Table 1.
Baseline characteristics of 489 tuberculosis (TB) patients and 305 household contact controls without TB in Dar es Salaam, Tanzania
| Characteristics n (%) | All |
TB patients |
Controls |
p |
|---|---|---|---|---|
| (n = 794) | (n = 489) | (n = 305) | ||
| Age (years), median (IQR) | 33.0 (26.1–41.2) | 33.0 (27.0–40.0) | 32.0 (25.7–42.4) | 0.7 |
| Age groups (years) | 0.096 | |||
| <25 | 153 (19.3) | 82 (16.8) | 71 (23.3) | |
| 25–34 | 290 (36.5) | 188 (38.4) | 102 (33.4) | |
| 35–44 | 205 (25.8) | 132 (27) | 73 (23.9) | |
| ≥45 | 146 (18.4) | 87 (17.8) | 59 (19.3) | |
| Male, sex | 484 (61.0) | 336 (68.7) | 148 (48.5) | <0.001 |
| HIV-positive | 168 (21.2) | 140 (28.6) | 28 (9.2) | <0.001 |
| Education level | 0.19 | |||
| No/primary | 285 (35.9) | 168 (34.4) | 117 (38.4) | |
| Secondary/University | 509 (64.1) | 321 (65.6) | 188 (61.6) | |
| Occupation | 0.25 | |||
| Employed | 509 (64.1) | 321 (65.6) | 188 (61.6) | |
| Current smoker | 0.053 | |||
| Yes | 104 (13.1) | 73 (14.9) | 31 (10.2) | |
| People in the household | 0.22 | |||
| >3 people | 204 (25.7) | 133 (27.2) | 71 (23.3) | |
| Weight (kg), median (IQR) | 54.0 (48.0–61.0) | 51.0 (45.5–57.0) | 59.0 (53.0–67.0) | <0.001 |
| BMI (kg/m2), median(IQR) | 20.1 (17.5–23.4) | 18.3 (16.5–20.4) | 24.0 (21.7–27.9) | <0.001 |
| BMI categories (kg/m2) | <0.001 | |||
| Normal/obese ≥18 | 517 (65.1) | 227 (46.4) | 290 (95.1) | |
| Underweight <18 | 277 (34.9) | 262 (53.6) | 15 (4.9) | |
| Body fat percentage (%) | 9.92 (7.5–14.4) | 9.41 (6.8–13.5) | 11 (8.5–15.8) | <0.001 |
| Hb level (g/dL), median (IQR) | 12.1 (10.4–13.3) | 11.4 (9.9–12.7) | 12.8 (11.5–14.2) | <0.001 |
| TB categories | ||||
| New | 477 (97.5) | 477 (97.5) | NA | NA |
| Retreatment | 12 (2.5) | 12 (2.5) | NA | |
BMI, body mass index; IQR, interquartile range; Hb, haemoglobin; HIV, human immunodeficiency virus; NA, not applicable.