Table 6.
Summary of the linear regression models better fittinga each general mental health state (MHS) indicator (N = 5,013).
| MHS indicator | Predictors | Estimate | Std. Error | t-value | p-value b | 95% CI | |
|---|---|---|---|---|---|---|---|
| 2.5% | 97.5% | ||||||
| Self-perceived health | Intercept | 7.63 | 0.16 | 46.19 | < 0.001 | 7.31 | 7.96 |
| Age | −0.07 | 0.01 | −12.00 | < 0.001 | −0.08 | −0.06 | |
| Prevalence of COVID-19: intermediate | −0.31 | 0.10 | −2.98 | 0.003 | −0.51 | −0.11 | |
| Prevalence of COVID-19: low | −0.21 | 0.13 | −1.57 | 0.12 | −0.47 | 0.05 | |
| Mental disorder history: yes | 0.31 | 0.11 | 2.87 | 0.004 | 0.10 | 0.53 | |
| Suicide attempt history: no | −1.51 | 0.10 | −14.63 | < 0.001 | −1.71 | −1.30 | |
| Suicide attempt history: yes | −0.13 | 0.18 | −0.70 | 0.48 | −0.48 | 0.23 | |
| Quarantine sub-periods: 2. 2nd pre-ext. | 0.19 | 0.17 | 1.09 | 0.28 | −0.15 | 0.52 | |
| Quarantine sub-periods: 3. 1st ext. | 0.64 | 0.15 | 4.30 | < 0.001 | 0.35 | 0.93 | |
| Quarantine sub-periods: 4. 2nd/3rd ext. | 1.45 | 0.16 | 8.82 | < 0.001 | 1.13 | 1.77 | |
| Quarantine sub-periods: 5. 4th ext. | 1.33 | 0.16 | 8.16 | < 0.001 | 1.01 | 1.65 | |
| Quarantine sub-periods: 6. 5th ext. | 1.46 | 0.14 | 10.63 | < 0.001 | 1.19 | 1.73 | |
| Psychological discomfort | Intercept | 4.10 | 0.09 | 45.26 | < 0.001 | 3.92 | 4.28 |
| Age | −0.03 | 0.003 | −8.66 | < 0.001 | −0.03 | −0.02 | |
| Prevalence of COVID-19: intermediate | −0.19 | 0.06 | −3.27 | 0.001 | −0.30 | −0.07 | |
| Prevalence of COVID-19: low | −0.14 | 0.07 | −1.96 | 0.05 | −0.29 | 0.0003 | |
| Mental disorder history: yes | 0.17 | 0.06 | 2.90 | 0.004 | 0.06 | 0.29 | |
| Suicide attempt history: no | −0.57 | 0.06 | −10.04 | < 0.001 | −0.68 | −0.46 | |
| Suicide attempt history: yes | −0.14 | 0.10 | −1.40 | 0.16 | −0.33 | 0.05 | |
| Quarantine sub-periods: 2. 2nd pre-ext. | −0.01 | 0.09 | −0.06 | 0.95 | −0.19 | 0.18 | |
| Quarantine sub-periods: 3. 1st ext. | 0.22 | 0.08 | 2.73 | 0.007 | 0.06 | 0.38 | |
| Quarantine sub-periods: 4. 2nd/3rd ext. | 0.72 | 0.09 | 8.01 | < 0.001 | 0.54 | 0.90 | |
| Quarantine sub-periods: 5. 4th ext. | 0.67 | 0.09 | 7.54 | < 0.001 | 0.50 | 0.85 | |
| Quarantine sub-periods: 6. 5th ext. | 0.73 | 0.07 | 9.75 | < 0.001 | 0.59 | 0.88 | |
| Social functioning and coping | Intercept | 3.53 | 0.09 | 37.73 | < 0.001 | 3.35 | 3.72 |
| Age | −0.04 | 0.003 | −12.78 | < 0.001 | −0.05 | −0.03 | |
| Prevalence of COVID-19: intermediate | −0.12 | 0.06 | −2.09 | 0.04 | −0.24 | −0.01 | |
| Prevalence of COVID-19: low | −0.07 | 0.08 | −0.88 | 0.38 | −0.22 | 0.08 | |
| Mental disorder history: yes | 0.14 | 0.06 | 2.26 | 0.02 | 0.02 | 0.26 | |
| Suicide attempt history: no | −0.94 | 0.06 | −16.11 | < 0.001 | −1.05 | −0.83 | |
| Suicide attempt history: yes | 0.01 | 0.10 | 0.11 | 0.91 | −0.19 | 0.21 | |
| Quarantine sub-periods: 2. 2nd pre-ext. | 0.19 | 0.10 | 1.98 | 0.05 | 0.002 | 0.38 | |
| Quarantine sub-periods: 3. 1st ext. | 0.42 | 0.08 | 4.95 | < 0.001 | 0.25 | 0.58 | |
| Quarantine sub-periods: 4. 2nd/3rd ext. | 0.73 | 0.09 | 7.82 | < 0.001 | 0.55 | 0.91 | |
| Quarantine sub-periods: 5. 4th ext. | 0.66 | 0.09 | 7.11 | < 0.001 | 0.47 | 0.84 | |
| Quarantine sub-periods: 6. 5th ext. | 0.73 | 0.08 | 9.34 | < 0.001 | 0.58 | 0.88 | |
| Psychological distress | Intercept | 31.99 | 0.36 | 89.11 | < 0.001 | 31.29 | 32.70 |
| Age | −0.18 | 0.02 | −13.90 | < 0.001 | −0.20 | −0.15 | |
| Mental disorder history: yes | 2.32 | 0.25 | 9.34 | < 0.001 | 1.83 | 2.80 | |
| Suicide attempt history: no | −5.09 | 0.23 | −21.80 | < 0.001 | −5.54 | −4.63 | |
| Suicide attempt history: yes | 1.31 | 0.41 | 3.20 | 0.001 | 0.51 | 2.12 | |
| Quarantine sub-periods: 2. 2nd pre-ext. | 0.13 | 0.39 | 0.34 | 0.73 | −0.63 | 0.89 | |
| Quarantine sub-periods: 3. 1st ext. | 0.16 | 0.34 | 0.49 | 0.62 | −0.50 | 0.83 | |
| Quarantine sub-periods: 4. 2nd/3rd ext. | 2.22 | 0.37 | 6.02 | < 0.001 | 1.50 | 2.95 | |
| Quarantine sub-periods: 5. 4th ext. | 2.11 | 0.35 | 5.97 | < 0.001 | 1.42 | 2.80 | |
| Quarantine sub-periods: 6. 5th ext. | 2.63 | 0.31 | 8.44 | < 0.001 | 2.02 | 3.24 | |
Std. Error, Standard error; 95% CI, 95% Confidence Interval; Prevalence of COVID-19 (Sites of residence by prevalence of COVID-19 cases): Low, up to 10 confirmed cases of COVID-19 per 100,000 inhabitants; Intermediate, between 11 and 25 confirmed cases of COVID-19 per 100,000 inhabitants; High, > 50 confirmed cases of COVID-19 per 100,000 inhabitants; Mental disorder history: yes, Presence of mental disorder history; no, Absence of mental disorder history; Suicide attempt history: yes, Presence of suicide attempt history; no, Absence of suicide attempt history; Quarantine sub-periods: 1. 1st pre-ext., First week of quarantine before extension, including participants answering during 17–23 March 2020; 2. 2nd pre-ext., Second week of quarantine before extension, including participants answering during 24–29 March 2020; 3. 1st ext., Sub-period after the first quarantine extension, including participants answering during 30 March to 10 April 2020; 4. 2nd/3rd ext., Sub-period after the second quarantine extension and including the third extension, with participants answering during 11 April to 08 May 2020; 5. 4th ext., Sub-period after the fourth quarantine extension, including participants answering during 09–23 May 2020; 6. 5th ext., Sub-period after the fifth quarantine extension, including participants answering during 24 May to 04 June 2020.
Best fitted model according to multiple linear regressions: stepwise selection (direction: both) by using the exact Akaike's Information Criterion (AIC) to compare additive fitted models.
Exact p-values are informed, except for p-values under 0.001, which are informed as <0.001. Statistically significant p-values are highlighted in bold.