Table 2.
Proportion and number of circumcised clients in different age groups, by arm and region.
| Region | |||
| Both regions (primary analysis) | Njombe | Tabora | |
| Proportion of clients aged 20–34 years (primary analysis) | |||
| Intervention arm (n = 6191) | 1462a (17.7%)b | 212 (11.3%) | 1250 (27.5%) |
| Control arm (n = 3926) | 493 (13.0%) | 153 (14.7%) | 340 (11.5%) |
| Prevalence ratioc (95% CI) | 1.36 (0.93–1.98) | 0.77 (0.37–1.61) | 2.39 (1.66–3.43) |
| P value | P = 0.11 | P = 0.44 | P < 0.001 |
| P value for interaction by region | P = 0.006 | ||
| Mean number of clients aged 20–34 years (SE) | |||
| Intervention arm (n = 6191) | 146d (42) | 42 (9) | 250 (51) |
| Control arm (n = 3926) | 49 (10) | 31 (6) | 68 (15) |
| Mean difference (%; 95% CI) | 97 (40–154) | 12 (−14–38) | 182 (44–320) |
| P value | P = 0.002 | P = 0.32 | P = 0.02 |
| P value for interaction by region | P = 0.006 | ||
| Proportion of clients aged ≥20 years | |||
| Intervention arm (n = 6191) | 1928 (25.5%) | 393 (19.1%) | 1535 (34.1%) |
| Control arm (n = 3926) | 601 (16.0%) | 188 (18.3%) | 413 (14.0%) |
| Prevalence ratio (95% CI) | 1.60 (1.09–2.34) | 1.05 (0.49–2.22) | 2.44 (1.71–3.49) |
| P value | P = 0.02 | P = 0.89 | P < 0.001 |
| P value for interaction by region | P = 0.03 | ||
| Mean number of clients aged ≥20 years (SE) | |||
| Intervention arm (n = 6191) | 193 (50) | 78 (28) | 307 (61) |
| Control arm (n = 3926) | 60 (12) | 38 (7) | 82 (18) |
| Mean difference (%; 95% CI) | 133 (59–207) | 41 (−35–117) | 224 (57–391) |
| P value | P = 0.002 | P = 0.22 | P = 0.02 |
| P value for interaction by region | P = 0.02 | ||
| Mean number of clients, all ages (SE) | |||
| Intervention arm (n = 6191) | 619 (110) | 359 (51) | 879 (133) |
| Control arm (n = 3926) | 393 (83) | 205 (32) | 580 (110) |
| Mean difference (%; 95% CI) | 227 (33–420) | 154 (12–297) | 299 (-102–699) |
| P value | P = 0.03 | P = 0.04 | P = 0.12 |
| P value for interaction by region | P = 0.44 | ||
| Proportion of clients aged 20–29 years | |||
| Intervention arm (n = 6191) | 1237 (14.5%) | 164 (8.9%) | 1073 (23.6%) |
| Control arm (n = 3926) | 416 (11.0%) | 133 (12.8%) | 283 (9.5%) |
| Prevalence ratio (95% CI) | 1.31 (0.88–1.95) | 0.69 (0.33–1.47) | 2.49 (1.64–3.76) |
| P value | P = 0.16 | P = 0.29 | P = 0.001 |
| P value for interaction by region | P = 0.003 | ||
CI, confidence interval; SE, standard error.
aTotal number of clients aged 20–34 years (over all clusters).
bGeometric mean of cluster-level proportions.
cRatio of geometric mean of cluster-specific prevalence in intervention and control arm.
dArithmetic mean number of clients with the outcome per cluster.