Abstract
Background
COVID-19 pandemic has major ramifications for global health and economy, with growing concerns about economic recession and implications for mental health. Here we investigated the associations between pandemic-related income loss with financial strain and mental health trajectories over a 1-month course, in two independent cohorts.
Methods
Two independent studies were conducted in the U.S and in Israel at the beginning of the outbreak (March-April 2020, T1; study I: N = 2904, study II: N = 1267) and at a 1-month follow-up (T2; study I: N = 1318, study II: N = 241). Mixed-effects models were applied to assess associations among COVID-19-related income loss, financial strain, and pandemic-related worries about health, with anxiety and depression, controlling for multiple covariates including pre-COVID-19 income.
Results
In both studies, income loss and financial strain were associated with greater depressive symptoms at T1, above and beyond T1 anxiety, worries about health, and pre-COVID-19 income. Worsening of income loss was associated with exacerbation of depression at T2 in both studies. Worsening of subjective financial strain was associated with exacerbation of depression at T2 in one study (US).
Conclusions
Income loss and financial strain were uniquely associated with depressive symptoms and their exacerbation over time, above and beyond pandemic-related anxiety. In times when a myriad of stressors are affecting mental health worldwide, our findings reveal specific links between the economic impact of COVID-19 and psychiatric outcomes.
Keywords: COVID-19, Economy, Depression, Financial strain, Mental health
1. Introduction
COVID-19 pandemic has major ramifications for global health (Holmes et al., 2020). To reduce virus spread, countries have ordered strict measures to impose social distancing (Parmet and Sinha, 2020). While such preventive measures are effective in reducing transmission, their economic costs are overwhelming (Bureau of Labor Statistics, 2020; World Bank, 2020a, 2020b; World Health Organization, 2020). By June 2020, the pandemic has yielded at least 68 million additional “poverty-years”, equivalent to 68 million people falling into poverty for the following year (Decerf et al., 2020), with greater unemployment, which is a major risk factor for worsened mental health (Zimmerman and Katon, 2005). Unemployment increases psychological strain as, besides the loss of income, it is accompanied with loss of social contact, status and sense of competence (Goldman-Mellor et al., 2010). Thus, the economic climate in mid-2020 poses an imminent threat to mental health deterioration (Van Hal, 2015), adding to the health-related stress invoked by the pandemic. Notably, economic stress was specifically associated with seeking mental health help due to depression in past recessions (Gili et al., 2013), and there are growing concerns regarding the implication of COVID-19-related economic slowdown on depression and consequent suicide risk (Reger et al., 2020).
The current COVID-19 crisis hits hard on global mental health. In China, high levels of anxiety and depression were associated with worries about income, job, study or inability to pay loans (Li et al., 2020). In a large study conducted in the UK, people who were unemployed or had no income (e.g. were full-time students) during the pandemic were more distressed than those employed. Furthermore, people who lost their job during the pandemic expressed greater increase in distress than individuals who were already unemployed before COVID-19 (Pierce et al., 2020a). A recent Dutch study showed similar results comparing students and job seekers with paid employees (van der Velden et al., 2020). Studies from the U.S reported higher rate of depressive symptoms during the pandemic compared with pre-pandemic (Ettman et al., 2020; Twenge and Joiner, 2020), highlighting low income, lack of savings (Ettman et al., 2020) and unemployment (Fitzpatrick et al., 2020) as risk factors for depression. These findings might reflect the link between COVID-19-related decrease in financial security and deterioration in mental health; however, these studies did not address the specificity of financial concerns to mental health beyond other concerns such as COVID-19 health-related worries (Pierce et al., 2020a; van der Velden et al., 2020). In a study from Switzerland, the impact of financial concerns on internalizing symptoms among young adults exceeded that of health-related concerns (Shanahan et al., 2020). This finding is in line with a report that young people are less physically threatened by the virus, but are more vulnerable to losing their job (Sanchez et al., 2020). While data on mental health during the current pandemic is mounting, most studies to date were either cross-sectional (Pappa et al., 2020; Salari et al., 2020) or compared current reaction with pre-pandemic situation, capturing one specific moment in the course of the pandemic. Longitudinal data on trends in mental health during the pandemic are scarce, and there is need for longitudinal data to clarify the link between finances and mental health, as well as their trajectories during COVID-19 (Czeisler, 2020; Holmes et al., 2020).
We recently described a crowdsourcing platform (covid19resilience.org) that collected data on COVID-19-related stress (worries) and mental health. In a population primarily composed of US and Israel participants sampled during the acute pandemic outbreak (Barzilay et al., 2020). In the current research, we investigated the specific association between self-reported financial consequences of COVID-19 and mental health (anxiety and depression) during the pandemic, over and above the impact of health-related concerns. We further analyzed data from an independent study conducted in Israel. In each study we investigated (1) cross sectional associations between financial hardship and concurrent mental health and (2) mental health trajectories over a month during the pandemic. We hypothesized that loss of income (objective financial hardship) and perceptions of financial strain (the subjective feeling of economic well-being (Wilkinson, 2016) would be associated with increased anxiety and depression symptoms and would predict the exacerbation of symptoms over time above and beyond COVID-19-health-related concerns. We further tested whether financial stressors would be uniquely associated with depression, above and beyond their effect on anxiety symptoms.
2. Methods
2.1. Cohort 1
2.1.1. Participants and procedure
Participants were ascertained through a crowdsourcing website (https://covid19resilience.org/) that collected data on COVID-19-related stress (worries), resilience and mental health (Barzilay et al., 2020). At the end of the survey, participants received personalized feedback on their responses. The feedback was meant to incentivize participants to complete the survey carefully. Participants were offered the opportunity to leave their email address and be contacted for follow up surveying. The study was advertised through, 1) the researchers’ social networks, including emails to colleagues around the world; 2) social media; 3) the University of Pennsylvania and Children's Hospital of Philadelphia internal notifications and websites; and 4) organizational mailing lists. The survey was available in English and Hebrew. The results presented are based on data collected from April 6th to May 5th, 2020 for the baseline cross sectional analysis (T1); Participants who left their email address in T1 and consented to be re-contacted received an email inviting them to participate in a longitudinal survey between May 12th and June 21st (T2). Participation required responders to provide online consent. The study was approved by the Institutional Review Board of the University of Pennsylvania.
2.1.2. Measures
Anxiety and depression were measured using the Generalized Anxiety Disorder-7 (GAD-7) questionnaire (Spitzer et al., 2006) and Patient Health Questionnaire-2 (PHQ-2) (Arroll et al., 2010), respectively. COVID-19-related worries (self-contracting COVID-19, family contracting COVID-19, financial burden due to COVID-19) were measured on a 5-point Likert-type scale (from not at all to a great deal). Participants were also asked whether they had lost their job or whether their pay/hours were reduced since the beginning of the outbreak (collapsed into a binary income loss measure [yes/no]).
2.2. Statistical analysis
2.2.1. Cross sectional models
Linear mixed-effects models were applied to investigate associations of financial hardship with mental health (anxiety and depression symptoms) as the dependent variable. In the first model, we considered income loss (yes/no) as the independent variable. In the second model, we considered the COVID-19-related financial strain (stress/worry) as the independent variable, contrasted against the stress of self-contracting COVID-19, which served as the reference variable for pandemic-related worries. This model also included the stress of a family member contracting COVID-19. Symptom type (anxiety or depression) was addressed as within-person repeated measure. Models included multiple potential confounders: age, gender, pre-COVID-19 annual income (in USD [ordinal measure]), relationship status, living alone, country of origin and date of survey completion.
2.2.2. Longitudinal models
For the longitudinal analysis we used linear mixed-effects models with the symptoms as the key dependent variable, where change over time could be observed due to the longitudinal nature of the data. Model 1 included dynamics (change) in income loss from T1 to T2. Change in income loss consisted of four possible values (1-0, 0-0, 1-1, 0-1; 0=no loss; 1=loss), where income loss at T2 was considered as deterioration in financial situation (even if already reported at T1, due to expected regression to the mean). Model 2 considered change in worries between T1 and T2 and was calculated as the difference in responses between time-points. Symptom type (anxiety or depression) was addressed as within-person repeated measure. Covariates were the same as cross-sectional models in addition to duration between T1 and T2.
All analyses were performed using the lmerTest package (Kuznetsova et al., 2017) in R.
3. Cohort 2
3.1. Participants and procedure
Participants were adult Israelis recruited through a survey link distributed among the researchers’ social media network (WhatsApp contacts and in public groups on Facebook). Data were collected between March 18th and 26th (T1), and again between April 22nd and May 7th (T2, for participants who agreed to be re-contacted for longitudinal surveying through email). All surveys were conducted in Hebrew. Participation required providing online consent. The study was approved by the Institutional Review Board of Sheba Medical Center.
3.2. Measures
We screened for anxiety and depression with the Hebrew version of the Patient-Reported Outcomes Measurement Information System (PROMIS) Anxiety and Depression modules (Bevans et al., 2014; Mosheva et al., 2020). COVID-19-related stressors (worries) were compiled from questions that have been shown to be pertinent to mental health in previous research on the SARS and N1H1 pandemics (Imai et al., 2010), and were measured on a 4-point Likert-type scale (From not at all to always). Sociodemographic questions were the same as in Cohort 1 with the exception of income (from considerably below average to considerably above average) and income loss (from no income loss to extreme income loss) that were measured on a 5-point Likert-type scale.
3.3. Statistical analysis
We employed similar models as described in Cohort 1 with a few alterations: The key dependent variables in the cross-sectional and longitudinal models were PROMIS scores (instead of GAD7/PHQ2). Income loss was on a 5-point scale (instead of binary in Cohort 1), therefore change in income loss was also calculated as the difference in responses between T1 and T2.
3.4. Sensitivity analyses
To address potential biases that might have been influenced due to the attrition in both samples, we compared the participants who completed the follow-up survey with participants who did not. Binary measures (such as sex distribution, country of origin etc.) were tested using Z-test for two samples proportions, and Cohen's h was computed to assess effect sizes. Continuous measures (such as age and clinical questionnaires) were tested using t-test for two independent samples, and Cohen's d was computed to assess effect sizes.
To address effects of country (US/Israel) in Cohort 1, we added a stratified analysis by country run separately on US and Israel participants from Cohort 1.
4. Results
4.1. Cohort 1
4.1.1. Sample characteristics
Cross sectional data (T1) was collected from 5717 participants who completed the resilience survey and the COVID-19-related questions. Of them, 2904 people opted in to complete GAD-7 and PHQ-2, and were included in this study. Participants were mostly female (n = 2259, 77.8%) with mean age of 41.97 (SD = 13.55; range 18 to 91). 815 participants (28.1%) were in the top income category (annual income>$150,000), 556 (19.0%) reported they experienced income loss, and 223 (7.7%) endorsed the top category of financial worries due to COVID-19. In the longitudinal survey (T2), data was obtained from 1318 participants (54.8% response rate out of n = 2404 that were re-contacted after providing their email in T1). Prevalence of females (n = 1077, 81.7%), mean age (M = 40.79, SD = 13.59), income loss (n = 246, 18.7%) and high financial strain (n = 99, 7.5%) resembled T1. Cohort characteristics are presented in Table 1 .
Table 1.
Cohort 1 (Penn) | Cohort 2 (Sheba) | |||
---|---|---|---|---|
T1 data | Demographics | N | 2904 | 1267 |
Data collected between | April 6th–May 5th, 2020 | March 18th–26th, 2020 | ||
US/Israel | 2111 / 597 | 0/1267 | ||
Age, mean in years (SD) | 41.97 (13.55) | 35.21 (12.26) | ||
Female, n (%) | 2259 (77.8%) | 687 (54.2%) | ||
Married/living with partner, n (%) | 1976 (68.0%) | 768 (60.6%) | ||
Living alone during COVID-19, n (%) | 546 (18.8%) | 404 (31.9%) | ||
COVID-19 related stress | Pre-COVID-19 income, measure | Annual income brackets in $ | Considerably below (1) – considerably above (5) average | |
Top income category, n (%) | 815 (28.1%) | 148 (11.7%) | ||
COVID-19 related stress, measure | Not at all (1) – Great deal (5) | Not at all (1) – Always (4) | ||
Contracting COVID-19, top category, n (%) | 226 (7.8%) | 52 (4.1%) | ||
Family contracting COVID-19, top category, n (%) | 641 (22.1%) | 230 (18.2%) | ||
Financial measures | Financial strain due to COVID-19, top category, n (%) | 223 (7.7%) | 226 (17.8%) | |
Income loss, measure | Lost job / Reduced pay / Reduced hours | 5-point Likert scale | ||
Income loss, n (%) | 556 (19.0%) | 501 (39.5%) | ||
T2 data | N | 1318 | 241 | |
Demographics | Data collected between | May 12th – June 6th | April 22nd – May 7th | |
Days from T1 to T2, mean (SD) | 31.6 (5.4) | 37.0 (4.0) | ||
US/Israel | 1028/210 | 0 / 241 | ||
Age, mean in years (SD) | 40.79 (13.59) | 37.72 (12.60) | ||
Female, n (%) | 1077 (81.7%) | 166 (68.9%) | ||
Financial measures | Financial strain due to COVID-19, top category, n (%) | 99 (7.5%) | 33 (13.7%) | |
Income loss, n (%) | 246 (18.7%) | 102 (42.3%) |
4.1.2. Cross sectional association of financial factors with mental health
Higher pre-COVID-19 income was negatively associated with overall anxiety and depression (GAD7 and PHQ2) symptom load (β = -0.02, SE < .01, t (14070) = -3.41, p < 0.001). Income loss during COVID-19 (losing job or reduced pay) was associated with greater depressive symptoms, but not anxiety (Fig. 1 A, Table 2 , income loss by symptom type (anxiety/depression) interaction, p < 0.0001) and had no main effect on general (anxiety and depression) symptom load (p = 0.738).
Table 2.
Cohort 1 | Cohort 2 | |||||
---|---|---|---|---|---|---|
Standardized β (SE) | t | p | Standardized β (SE) | t | p | |
Model 1: Objective financial hardship | ||||||
Income- main effect on symptoms load (anxiety and depression) | -0.02 (0.01) | -3.41 | <0.001 | -0.02 (0.02) | -1.37 | 0.168 |
Income loss- main effect on symptoms load (anxiety and depression) | 0.01 (0.04) | 0.33 | 0.738 | 0.08 (0.02) | 4.90 | <0.0001 |
Specific effect of income loss on depression# | 0.14 (0.02) | 8.19 | <0.0001 | 0.06 (0.01) | 8.75 | <0.0001 |
Model 2: Subjective financial strain | ||||||
Overall COVID-19 worries- main effect on symptoms load (anxiety and depression) | 0.13 (0.01) | 13.35 | <0.0001 | 0.11 (0.01) | 7.86 | <0.0001 |
Worries about family contracting COVID-19- specific effect on Depression@ | -0.01 (0.01) | -1.03 | 0.304 | -0.02 (0.02) | -1.19 | 0.232 |
Worries about finance- specific effect on Depression@ | 0.17 (0.02) | 10.35 | <0.0001 | 0.15 (0.02) | 6.08 | <0.0001 |
Values were derived from linear mixed-effects models with financial hardship (objective in Model 1; subjective in Model 2) as independent variables, and standardized symptoms load (standardized PHQ-2 + GAD-7 scores in Cohort 1, PROMIS Anxiety and Depression scores in Cohort 2) as dependent variable. Models are adjusted for age, sex, relationship status, income and country of origin. Effect sizes are represented with standardized effect coefficients (β). SE= Standard error.
Modeled as the interaction between income loss and type of symptom domain (anxiety/depression).
Modeled as the interaction between worry type (family contracting COVID-19/financial concern about impact of COVID-19, contrasted against worries to self-contract COVID-19 as reference) and type of symptom domain (anxiety/depression).
COVID-19-related worries (self-contracting, family contracting and financial worries) were associated with greater symptom load (β = 0.13, SE = 0.01, t (15280) = 13.35, p < 0.0001). Financial worries were specifically associated with depressive symptoms (Table 2, financial worries by symptom type interaction, p < 0.0001).
4.1.3. Longitudinal association of 1-month dynamics in financial factors with mental health trajectories
Income loss at T2 was associated with 1-month increase in general symptoms load (β = 0.26). The increase in anxiety symptoms was steeper than that of depression symptoms (Fig. 2 A, Table 3 ).
Table 3.
Cohort 1Mean (SD) days from T1: 31.6 (5.4) | Cohort 2Mean (SD) days from T1: 37.0 (4.0) | |||||
---|---|---|---|---|---|---|
Standardized β (SE) | t | p | Standardized β (SE) | t | p | |
Model 1: Trajectory of objective financial hardship | ||||||
Income loss trajectory- main effect on increase in symptoms load (anxiety and depression) | 0.26 (0.02) | 14.66 | <0.0001 | 0.01 (0.05) | 0.23 | 0.817 |
Income loss trajectory- specific effect on increase in depression# | -0.07 (0.02) | -4.89 | <0.0001 | 0.07 (0.03) | 2.76 | 0.005 |
Model 2: Trajectory of subjective financial strain | ||||||
Overall COVID-19 worries trajectory- main effect on increase in symptoms load (anxiety and depression) | 0.13 (0.02) | 6.20 | <0.0001 | 0.07 (0.04) | 1.65 | 0.098 |
Worries about family contracting COVID-19 trajectory- specific effect on increase in depression@ | 0.05 (0.04) | 1.06 | 0.285 | 0.01 (0.09) | -0.03 | 0.975 |
Worries about finance trajectory- specific effect on increase in depression@ | 0.07 (0.03) | 2.10 | 0.035 | 0.02 (0.08) | 0.32 | 0.741 |
Values were derived from linear mixed-effects models with financial hardship (objective in Model 1; subjective in Model 2) as independent variables, and standardized symptoms load (standardized PHQ-2 + GAD-7 scores in Cohort 1, PROMIS Anxiety and Depression scores in Cohort 2) as dependent variable. Models are adjusted for age, sex, relationship status, income and country of origin. Effect sizes are represented with standardized effect coefficients (β). SD= Standard deviation. SE= Standard error.
Modeled as the interaction between trajectory of income loss and change in type of symptom domain (anxiety/depression).
Modeled as the interaction between trajectory of change in worry type (family contracting COVID-19/financial concern about impact of COVID-19, contrasted against worries to contract COVID-19) and type of symptom domain (anxiety/depression).
Increase in COVID-19-related worries between T1 and T2 was associated with an increase in general symptoms load (β = 0.13, SE = 0.02, t (7176) = 6.20, p < 0.0001). Increase in financial worries was specifically associated with depressive symptoms (increase in financial worries by symptom type interaction, p < 0.035). Full model statistics are summarized in Table 3.
4.2. Cohort 2
4.2.1. Sample characteristics
We conducted similar analysis on a replication cohort from Israel. Of the 1376 participants that clicked the survey link and initiated the survey, 1267 people completed PROMIS and COVID-19-related questions, and were included in this study. Participants were majority female (n = 687, 54.2%) with mean age of 35.21 (SD = 12.26). 142 participants (11.7%) were in the top income category (reporting their income to be considerably above average), 501 (39.5%) reported that they experienced income loss, and 226 (17.8%) endorsed the top category of financial worries due to COVID-19. In the longitudinal survey, data was obtained from 241 participants out of n = 485 that agreed to participate in the follow up study (49.7% response rate). Compared with T1, the follow up sample included higher prevalence of females (n = 166, 68.9%) and lower prevalence of people who endorsed the top category for COVID-19-related financial strain (33, 13.7%). Other factors such as age (M = 37.32, SD = 12.60) and rates of income loss (n = 102, 42.3%) were similar to those of the T1 sample. Cohort characteristics are presented in Table 1.
4.2.2. Cross sectional association of financial factors with mental health
Higher pre-COVID-19 income had no association with general symptoms (PROMIS depression and anxiety) load (β = 0.02, SE = 0.02, t (2192) = -1.37, p = 0.168). Income loss during COVID-19 was associated with overall higher symptom load (Table 1, standardized effect=0.08, p < 0.0001). The association of income loss with depression was greater than the association with anxiety (Fig. 1B, income loss by symptom type interaction, p < 0.0001).
COVID-19-related worries (self-contracting, family contracting and financial worries) were associated with greater symptoms load (β = 0.11, SE = 0.01, t (6535) = 7.86, p < 0.0001). Financial worries were specifically associated with depressive symptoms (Table 2, financial worries by symptom type interaction, p < 0.0001).
4.2.3. Longitudinal (1-month) association of dynamics in financial factors with mental health trajectories
A negative trend in financial situation (i.e., worsening of income loss by T2 compared to T1) was associated with 1-month increase in depression (β = 0.07, p = 0.005), but had no association with increase in general symptoms load (p = 0.817, Fig. 2B, Table 3).
COVID-19-related worries had a trend-level effect on increase in general symptoms load (β = 0.07, p = 0.098). Increase in financial worries had no specific association with depressive symptoms (increase in financial worries by symptom type interaction, p = 0.741). Full model statistics are summarized in Table 3.
5. Sensitivity analyses
Overall, participants who completed the follow-up surveys had significant differences in baseline characteristics compared with participants who did not, with small to medium effect sizes. In Cohort 1, the follow-up subsample included a higher rate of females (p < 0.001, h = 0.57), more participants from the US (p < 0.001, h = 0.23), higher pre-COVID-19 income (p < 0.001, d = 0.16), lower depression (p = 0.039, d = 0.08) and younger age (p = 0.047, d = 0.07, Supplementary Table 1). In Cohort 2, the follow-up subsample included higher percentage of females (p < 0.001, h = 0.37) and were older in age (p = 0.003, d = 0.21, Supplementary Table 2).
Supplementary Table 3 presents the cross-sectional stratified analysis performed on Cohort 1, separately for participants from the US and Israel. Overall, cross-sectional results resembled those of the entire cohort, especially among participants from the US, which demonstrated a specific effect of income loss (p = 0.003) and financial worries (p < 0.001) on depressive symptoms, above and beyond anxiety. Participants from Israel demonstrated a specific effect of financial worries on depression, above and beyond anxiety (p = 0.005), but such association was not replicated regarding income loss. In the longitudinal analysis, no significant effects were found in either stratum (see Supplementary Table 4).
6. Discussion
Across two independent studies, we found a specific link between financial factors and depression, above and beyond anxiety, which was greater than the association between health-related worries and depression. In cross-sectional analyses of data collected from over 4000 participants, both loss of income and financial worries had unique effects on depression in the two studies. In longitudinal analyses of ~1500 participants, participants from both cohorts who reported a negative trend in income loss reported an increase in depressive symptoms over time. A specific effect of income loss and of financial worries on longitudinal worsening of depressive symptoms, independent of anxiety, was observed in one of two studies. Our findings are in line with data from previous global crises like the 2008 recession that showed a link between financial factors and increase in depression (Economou et al., 2013).
The abrupt loss of income (during the pandemic) was associated with overall more anxiety and depressive symptoms, but was associated more strongly with depression than anxiety symptoms, in both cohorts. This dissociation between anxiety and depression may indicate that acute loss of income is a specific risk factor for depression during the pandemic. Our results from Cohort 2 suggest that recent income loss (measured on a 5-point Likert scale) contributes not only to initial depressive response (data collected at the onset of the pandemic), but may also cause its amplification over time, with a 1-month exacerbation in depressive symptoms associated with worsening in income loss. While we observed an increase in depressive symptoms in Cohort 1 over time in association with income loss, this effect was also observed with worsening of anxiety, even to a larger extent. It is possible that demographic differences between the two cohorts may explain this difference in findings, as Cohort 1 was sampled from a wealthier population that was likely to have more “financial buffering” capacity (i.e., savings, other financial resources beyond salary), and therefore the impact on depression may not have been pronounced. It is also possible that the binary measure that we had used in Cohort 1 to capture income loss (losing job/reduced pay) did not allow sufficient variability in the data to specifically link the worsening of income loss with depression. Our results are in line with recent COVID-19-related data (Ettman et al., 2020) and with previous findings from economic crises, which associated unemployment and financial difficulties (e.g., mortgage repayment difficulties, evictions, financial shortage ranging from difficulty in paying loans to paying at the supermarket, etc.) with increased depression and help-seeking behaviors (Economou et al., 2013; Gili et al., 2013).
The link we observed between COVID-19 stress (worries) and depression was specific to financial worries. Health-related worries about contracting COVID-19 or family contracting it were associated with general symptoms load, but not depression specifically. This finding controlled for pre-COVID-19 income, suggesting that the objective financial situation only partly explains variability in depressive symptoms, and that worries about the financial situation may be a sensitive marker (red flag) for depressive symptoms during the pandemic. Coupled with the finding that objective income loss is tied to depressive symptoms and that the results replicated across two independent cohorts, our data converge to support the specific link between financial stressors and depressive symptoms. Previous works have shown that financial strain—the subjective stress about financial concerns—is associated with deterioration in mental health, even more than objective inability to meet financial requirements (Selenko and Batinic, 2011; Wilkinson, 2016).
The urgent need for solid scientific data on the pandemic's effect on health has spurred concerns regarding validity and generalizability of COVID-19-related publications (Pierce et al., 2020b). That our cross-sectional results were replicated across two independent cohorts is a strength of the current study, and enables generalization of the findings beyond a local perspective. It also mitigates the risk that our conclusions ensue from a type I error. The cohorts differed in terms of demographics - Cohort 1 being multinational (primarily US and Israel), composed mainly of highly educated people, enriched with healthcare providers and having a high prevalence of women compared with Cohort 2, which had a larger proportion of students and young adults, was more balanced in terms of gender distribution, and composed of Israeli population exclusively. In addition, that the two studies used different measurements and still results generally replicated across studies further supports the generalizability of our findings to other populations globally and augurs well for the internal validity of the data.
In light of the urgent dilemma of lockdown versus reopening, with the tradeoff between health and economy (The Guardian, 2020), the results of this study may have several implications for policymakers. We show here that the economic impact, which is strongly driven by lockdown policies, may have significant mental health implications like increase in depression. Due to the rising concerns regarding increased suicide risk in the face of the pandemic (Reger et al., 2020), the possible link between the financial impact of COVID-19 and depressive symptoms may be an indicator for policy makers as they determine policies of reopening the economy. Thus, our study emphasizes the importance of maintaining balance between necessary social distancing and minimization of economic slowdown. In addition, our findings can guide clinicians as they encounter patients during the pandemic, suggesting that healthcare providers should actively probe patients for a change for the worse in their income, and ask them specifically about their subjective stress regarding the financial impact of COVID-19. Our results may suggest that these financial stressors are sensitive markers for the development of depression. Importantly, our results suggest that the impact of income loss and financial strain on depressive symptoms are independent of pre-COVID-19 income. We therefore suggest that people from all backgrounds who report stress about their financial situation during the pandemic, including those with high income, are vulnerable to the effects of the financial crisis on mental health, and therefore no one should be overlooked for their increased risk for depression.
This study had several limitations. First, the sampling was not random, rather we employed a “snowball” recruitment in both cohorts through the investigators’ social networks. Therefore, potential biases that were reported recently in online surveys during COVID-19 should be considered (Pierce et al., 2020b). Specifically, regarding the financial situation of the current study's participants, the online nature of the study might have led to underrepresentation of low-income families with limited access to the internet, a possibility which limits findings’ generalizability. Second, we had substantial attrition between T1 and T2 in both studies, especially in Cohort 2, where we were likely underpowered to test longitudinal trajectories. Therefore, a type II error is possible. In the sensitivity analysis performed on Cohort 1, we found that some of our results, especially longitudinal effects, were not replicated when we tested participants from each country separately. This might derive from power loss due to attrition and stratification of the data, which did not enable us to detect associations in the dynamics of financial hardships with depression. In addition, this attrition might have led to several biases in the longitudinal results. A comparison between participants of the longitudinal studies with participants who did not participate in the follow-up surveys have indicated several differences between the groups, most notably sex distribution. In all sociodemographic and clinical measures, between-group differences were small to very small in terms of effect sizes, with sex being the only characteristic with medium effect size, yet possible biases should be acknowledged. Third, in Cohort 1, the measure for income loss was binary, which limited us in assessing variability in the trajectory over time. Lastly, our study employed online crowdsourcing data collection, with all of its inherent limitations as participants were not interviewed in person (Behrend et al., 2011). Still, arguably even when accounting for the limitations mentioned above, that overall, the association between objective (income loss) and subjective (financial worries) financial factors with depressive symptoms was replicated in two independent studies mitigates most concerns regarding generalizability of our findings.
To conclude, we provide converging evidence to suggest a specific association between financial stressors and depression during a global pandemic. A decrease in income during this time, as well as perceived financial strain, can lead to deterioration in mental health and might generate depression in a specific manner. Our findings may suggest that the “financial COVID-19” could have a serious impact on health, specifically mental health, and this impact should be taken into account while policy makers try to protect physical health. In light of the growing concern about increase in suicide following the pandemic (Reger et al., 2020), our findings provide empirical data collected during the pandemic that may help the efforts to improve early detection of and intervention with people at increased risk for depression. Future research could focus on early interventions that will enable mental health services to offer timely help to people who were financially harmed by the pandemic.
Statements
Funding sources
This study was supported by the National Institute of Mental Health (NIMH) grants K23-MH120437 (RB), R01-MH119219 (REG, RCG), R01-MH117014 (RCG), the US-Israel Binational Science Foundation Grant No. 2017369 (REG, DG and RB), Foundation Dora, Kirsh Foundation and the Lifespan Brain Institute of Children's Hospital of Philadelphia and Penn Medicine, University of Pennsylvania. DMG was funded in part by the Zuckerman STEM Leadership Program. The funding sources had no role in the study design, collection, analysis, or interpretation of data, the writing of the article, or decision to submit the article for publication.
Statement of ethics
The study was approved by the Institutional Review Boards of the University of Pennsylvania and Sheba Medical Center.
Study protocols and data sharing
Data collected for this study includes individual participants’ data. Data cannot be publicly accessible due to Institutional Review Board guidelines. We are open to collaborations with other researchers upon contacting us.
Author contributions
All authors significantly contributed to, reviewed and approved the final manuscript.
Conceiving and designing the study: NHP, TMM, DG, ID, DMG, LAB, LKW, MLS, RG, RCG, REG, IMP, RB.
Data collection: NHP, GED, EV, MHH, NM, RB.
Statistical analyses: TMM.
Data interpretation: NHP, TMM, DG, GED, ID, DMG, LAB, NM, LKW, EV, MHH, MLS, RG, RCG, REG, IMP, RB.
Writing of the manuscript draft: NHP, TMM, IMP, RB.
Critical revision for important intellectual content: DG, DMG, LAB, LKW, RCG, REG.
Declaration of Competing Interest
RB serves on the scientific board and reports stock ownership in ‘Taliaz Health’, with no conflict of interest relevant to this work. All other authors have no conflicts of interest do declare.
Acknowledgment
We thank participants of covid19resilience.org for their contribution to data generation. We wish to thank Amit Lewinthal, Shira Bursztyn and Dana Basel for their assistance in collecting the data. Special acknowledgment to Prof. Avner De-Shalit from the Hebrew University of Jerusalem, for his consultancy and enlightening insights.
Footnotes
Supplementary material associated with this article can be found, in the online version, at doi:10.1016/j.jad.2021.04.054.
Appendix. Supplementary materials
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