Table 1.
Demographic and clinical characteristics of cases by contact-based versus symptom-based surveillance
| Contact-based surveillance (n=87) | Symptom-based surveillance (n=292) | Unknown or other (n=12) | Total (n=391) | p value | |
|---|---|---|---|---|---|
| Sex | |||||
| Female | 63 (72%) | 131 (45%) | 10 (83%) | 204 (52%) | <0·0001 |
| Male | 24 (28%) | 161 (55%) | 2 (17%) | 187 (48%) | .. |
| Age | |||||
| 0–9 years | 13 (15%) | 6 (2%) | 1 (8%) | 20 (5%) | <0·0001 |
| 10–19 years | 5 (6%) | 6 (2%) | 1 (8%) | 12 (3%) | .. |
| 20–29 years | 11 (13%) | 23 (8%) | 0 (0%) | 34 (9%) | .. |
| 30–39 years | 15 (17%) | 71 (24%) | 1 (8%) | 87 (22%) | .. |
| 40–49 years | 9 (10%) | 49 (17%) | 2 (17%) | 60 (15%) | .. |
| 50–59 years | 10 (12%) | 63 (22%) | 1 (8%) | 74 (19%) | .. |
| 60–69 years | 20 (23%) | 60 (21%) | 6 (50%) | 86 (22%) | .. |
| ≥70 years | 4 (5%) | 14 (5%) | 0 (0%) | 18 (5%) | .. |
| Severity | |||||
| Mild | 18 (21%) | 82 (28%) | 2 (17%) | 102 (26%) | 0·03 |
| Moderate | 66 (76%) | 180 (62%) | 8 (67%) | 254 (65%) | .. |
| Severe | 3 (3%) | 30 (10%) | 2 (17%) | 35 (9%) | .. |
| Symptomatic | |||||
| No | 17 (20%) | 8 (3%) | 0 (0%) | 25 (6%) | <0·0001 |
| Yes | 70 (80%) | 284 (97%) | 12 (100%) | 366 (94%) | .. |
| Fever | |||||
| No | 25 (29%) | 34 (12%) | 2 (17%) | 61 (16%) | 0·0002 |
| Yes | 62 (71%) | 258 (88%) | 10 (83%) | 330 (84%) | .. |