Table 1.
Baseline characteristics of enrolled participants.
| Intervention arm | Control arm | |
|---|---|---|
| Index patients | n = 164 | n = 149 |
| Gender, Male | 105 (64.0) | 86 (57.7) |
| Index patient age group | ||
| ≤14 years | 4 (2.4) | 10 (6.7) |
| 15–24 years | 22 (13.4) | 17 (11.4) |
| 25–34 years | 58 (35.4) | 35 (23.5) |
| 35–49 years | 47 (28.7) | 44 (29.5) |
| ≥50 years | 33 (20.1) | 43 (28.9) |
| Type of COVID test used | ||
| Rapid diagnostic test | 161 (98.2) | 128 (85.9) |
| Polymerase chain reaction | 3 (1.8) | 21 (14.1) |
| Number of listed contacts, median (IQR) | 5 (3, 5) | 5 (3, 7) |
| Declared contacts | n = 854 | n = 849 |
| Gender | ||
| Male | 378 (44.3) | 361 (44.6) |
| Female | 476 (55.7) | 449 (55.4) |
| Not available | 0 | 39 |
| Contact age group | ||
| ≤14 years | 91 (10.7) | 91 (10.7) |
| 15–24 years | 170 (19.9) | 155 (18.3) |
| 25–34 years | 286 (33.5) | 194 (22.9) |
| 35–49 years | 217 (25.4) | 213 (25.1) |
| ≥50 years | 90 (10.5) | 196 (23.1) |
| Link with the index patient | ||
| Child | 150 (17.7) | 129 (18.1) |
| Husband/Wife | 39 (4.6) | 44 (6.2) |
| Other family member | 245 (28.8) | 201 (28.2) |
| Non-family member | 415 (48.9) | 339 (47.5) |
| Not available/missing | 5 | 136 |
| Did the index provide a phone number? | ||
| Yes, valida | 854 (100.0) | 743 (87.9) |
| Yes, not valid | 0 (0.0) | 12 (1.4) |
| No | 0 (0.0) | 90 (10.7) |
| Not available/missing | 0 | 4 |
| Type of contact | ||
| Had contact (1-m radius) with a confirmed case | 554 (68.7) | 272 (39.0) |
| Living in the same household | 175 (21.7) | 293 (42.0) |
| Staff who provided direct personal or clinical care | 42 (5.2) | 49 (7.0) |
| More than one meter or open space | 35 (4.3) | 84 (12.0) |
| Not available/missing | 48 | 151 |
Data are presented as n (%) unless otherwise stated.
IQR, interquartile range.
a
Phone numbers inside the range of numbers considered for use by the country’s telecom authorities; doesn’t mean they were active.