Sociodemographic characteristics of identified index cases
| Variable | Primary cases N=1257 |
| Sex | |
| Female | 638 (50.8) |
| Male | 619 (49.2) |
| Age (years) | |
| 14–18 | 9 (0.8) |
| 19–29 | 412 (32.8) |
| 30–59 | 755 (60.1) |
| >60 | 81 (6.4) |
| Occupation | |
| Healthcare worker | 109 (8.7) |
| Police/military/firefighter | 38 (3.0) |
| Construction worker | 16 (1.3) |
| Costumer/general services | 272 (21.6) |
| Essential office work | 211 (16.8) |
| Informal employment/looking for a job | 176 (14.0) |
| Public/private driver | 149 (11.9) |
| Teacher/auxiliary/student | 166 (13.2) |
| Other occupation* | 120 (9.6) |
| Socioeconomic strata | |
| High | 19 (1.5) |
| Middle high | 30 (2.4) |
| Middle | 161 (12.8) |
| Middle low | 619 (49.3) |
| Low | 364 (29.0) |
| Very low | 64 (5.0) |
| Report of at least one COVID-19-related symptom | |
| Yes | 539 (42.9) |
| No | 718 (57.1) |
| Contact with COVID-19 | |
| Yes | 329 (26.6) |
| No | 906 (73.4) |
| Type of healthcare insurance† | |
| Contributory | 1034 (83.3) |
| Subsidised | 115 (9.2) |
| Not affiliated | 198 (8.6) |
| Frequency of handwashing | |
| <10 times/day | 811 (64.7) |
| ≥10 times/day | 442 (35.3) |
| Duration of handwashing | |
| ≤20 s | 757 (60.4) |
| >20 s | 496 (39.6) |
| Use of facemasks during the day | |
| Always | 1035 (82.6) |
| Sometimes | 205 (16.4) |
| Never | 13 (1.0) |
| Household size | |
| ≤3 | 629 (50.0) |
| >3 | 628 (50.0) |
Missing information on 22 (1.8%) participants regarding contact with COVID-19; 90 (7.2%) participants regarding type of health insurance; 4 (0.3%) participants regarding frequency and duration of handwashing, use of facemasks during the day.
*Other occupations: cooks, musicians, technicians, veterinarians, among others; Socioeconomic strata as defined by the National Department of Statistics (DANE) of Colombia: 1 (very low strata) to 6 (high strata).
†According to health affiliation system in Colombia, people with formal employment are included in the contributory health system, while people working informally and unemployed have subsidised healthcare (public healthcare).