Table 1.
Study population characteristics at visit 1 (July–October 2020)
| Sotuba | Bancoumana | Donéguébougou | Overall | |
|---|---|---|---|---|
| Sample size (n) | 594 | 965 | 1113 | 2672 |
| Individuals | 585 | 959 | 1113 | 2657 |
| Co-enrolled infantsa | 9 | 6 | 0 | 15 |
| Demographics (%, n) | ||||
| Sex, male | 43.3% 257/594 |
51.9% 501/965 |
52.3% 582/1113 |
50.3% 1343/2672 |
| Age, years (median, IQR) | 14 (8-25) | 15 (8-33) | 14 (6-35) | 14 (8-31) |
| Age, years (%, n) | ||||
| < 10 | 34.0% 202/594 |
28.9% 279/965 |
32.0% 356/1113 |
31.3% 837/2672 |
| 10 - 17 | 27.4% 163/594 |
29.4% 284/965 |
26.1% 290/1113 |
27.6% 737/2672 |
| ≥ 18 | 38.5% 229/594 |
41.7% 402/965 |
41.9% 467/1113 |
41.1% 1098/2672 |
| Medical factors (%, n) | ||||
| No co-morbid conditions | 96.4% 564/585 |
99.2% 951/959 |
99.3% 1105/1113 |
98.6% 2620/2657 |
| Co-morbid conditions | 3.6% 21/585 |
0.8% 8/959 |
0.7% 8/1113 |
1.4% 37/2657 |
| Obesity | 0.9% 5/585 |
0% 0/959 |
0.4% 5/1113 |
0.4%10/2657 |
| Diabetes | 0.9% 5/585 |
0% 0/959 |
0% 0/1113 |
0.2% 5/2657 |
| HIV/other immune deficiency | 0% 0/585 |
0% 0/959 |
0% 0/1113 |
0% 0/2657 |
| Hypertension | 2.7% 16/585 |
1.4% 13/965 |
0.2% 2/1113 |
1.2%31/2657 |
| Cardiovascular disease | 0.2% 1/585 |
0% 0/959 |
0.1% 1/1113 |
0.1% 2/2657 |
| Chronic pulmonary condition | 0% 0/585 |
0% 0/959 |
0%0/1113 | 0% 0/2657 |
| Chronic hepatic condition | 0% 0/585 |
0% 0/959 |
0% 0/1113 |
0% 0/2657 |
| Chronic hematological condition | 0% 0/585 |
0.1% 1/959 |
0% 0/1113 |
<0.1%1/2657 |
| Chronic kidney disease | 0% 0/585 |
0% 0/959 |
0% 0/1113 | 0% 0/2657 |
| Chronic neurological impairment/disease | 0% 0/585 |
0% 0/959 |
0% 0/1113 |
0% 0/2657 |
| Malignancy | 0% 0/585 |
0% 0/959 |
0.1% 1/1113 |
<0.1%1/2657 |
| BCG vaccination | 88.9% 520/585 |
70.2% 673/959 |
85.2% 948/1113 |
80.6% 2141/2657 |
| Antimalarial use (within 4 weeks of visit 1) | 3.6% 21/585 |
3.9% 37/959 |
0.1% 1/1113 |
2.2% 59/2657 |
| Smokerb | 2.9% 15/526 |
0.8% 7/904 |
4.4% 48/1089 |
2.8% 70/2519 |
| Pregnancy | 1.0% 6/585 |
1.6% 15/959 |
0.2% 2/1113 |
0.9% 23/2657 |
| Trimester 1 | 0.2% 1/585 |
0.1% 1/959 |
0.2% 2/1113 |
0.2% 4/2657 |
| Trimester 2 | 0.3% 2/585 |
0.9% 9/959 |
0% 0/1113 |
0.4% 11/2657 |
| Trimester 3 | 0.5% 3/585 |
0.5% 5/959 |
0% 0/1113 |
0.3% 8/2657 |
| Post-partum (< 6 weeks) | 0.2% 1/585 |
0.2% 2/959 |
0% 0/1113 |
0.1% 3/2657 |
| Social factors (%, n) | ||||
| Employed in healthcare setting | 1.2% 7/585 |
1.8% 17/959 |
4.9% 55/1113 |
3.0% 79/2657 |
| Household member employed in healthcare setting | 22.6% 132/585 |
21.2% 203/959 |
1.5% 17/1113 |
13.2% 352/2657 |
| Household member previously diagnosed with COVID-19 | 0% 0/585 |
0% 0/959 |
0% 0/1113 |
0% 0/2657 |
| Household size (mean, SD) | 10.2 (5.7) | 7.1 (4.1) | 6.8 (2.9) | 7.7 (4.3) |
Abbreviations: COVID-19, coronavirus disease 2019; HIV, human immunodeficiency virus; IQR, interquartile range; SD, standard deviation.
aInfants aged 6–12 months were co-enrolled with their mother, and a limited history was collected.
bSmoking status collected at visit 2.