Table 1.

Differences in participant's characteristics between waves in Sample 1.

	Wave 0 (N = 1413)	Wave 1 (N = 1620)
Depression (PHQ > 9); n (%)	154 (10.9%)	363 (22.4%)
Depressive symptoms, median (IQR)	3.0 (1.0, 6.0)	5.0 (2.0, 9.0)
Sociodemographic characteristics
Age, years, mean ± SD	44.7 ± 11.7	45.6 ± 12.2
Gender: women, n (%)	1079 (76.4%)	1210 (74.7%)
Education, n (%)
Lower	357 (25.3%)	364 (22.5%)
Undergraduate	296 (20.9%)	272 (16.8%)
Graduate or higher	760 (53.8%)	980 (60.6%)
Occupation, n (%)
Physician	379 (26.8%)	675 (41.7%)
Nurse or other medical staff	604 (42.7%)	595 (36.7%)
Management	234 (16.6%)	191 (11.8%)
Other	196 (13.9%)	159 (9.81%)
Work sector: private, n (%)	194 (13.7%)	322 (19.9%)
Risk factors for poor mental health
Daily informal caregiving, n (%)	764 (61.3%)	675 (41.7%)
Stress, n (%)	355 (25.2%)	877 (54.2%)
Chronic physical illness, n (%)	291 (22.9%)	478 (31.1%)
Change in function, n (%)	563 (39.8%)	599 (37.0%)
Contact with COVID-19 patients, n (%)
Yes	235 (16.6%)	1106 (68.9%)
No	886 (62.7%)	318 (19.8%)
I do not know	292 (20.7%)	182 (11.3%)
Patient prioritization, n (%)
Yes	88 (8.3%)	319 (20.0%)
No	823 (78.0%)	1049 (65.7%)
Does not apply	144 (13.6%)	229 (14.3%)
Experience of stigmatization, discrimination or violence, n (%)	420 (29.7%)	432 (27.0%)
Experience of death due to COVID-19, n (%)	153 (11.7%)	831 (52.1%)
Protective factors for mental health
Resilience, mean ± SD	3.4 ± 0.6	3.3 ± 0.7
Sufficient PPE, n (%)	844 (63.4%)	1133 (74.1%)
Trust in workplace, n (%)
Low	195 (13.8%)	219 (13.7%)
Moderate	516 (36.5%)	552 (34.6%)
High	702 (49.7%)	824 (51.7%)

The data is original, missing data on covariates not imputed.

PHQ Patient Health Questionnaire, PPE personal protective equipment, SD standard deviation, IQR interquartile range.