Table 3:
Risk factors for Coprevalent and Incident Tuberculosis at Baseline and over 1-Year Follow-up
| Variable | RR | 95% CI |
|---|---|---|
| Intercept | 0.02 | (0.01–0.05) |
| Demographics | ||
| Male | 1.30 | (1.08–1.57) |
| Socioeconomic status | ||
| Poor roof | 1.00 | (0.64–1.56) |
| Overcrowded | 1.20 | (0.99–1.47) |
| Age groups | ||
| 0–9 yr | 3.54 | (1.44–8.67) |
| 10–19 yr | 2.13 | (0.81–5.64) |
| 20–29 yr | REF | — |
| 30–39 yr | 0.72 | (0.50–1.04) |
| 40–49 yr | 0.46 | (0.29–0.74) |
| 50+ yr | 0.73 | (0.51–1.03) |
| Exposure | ||
| SCPI | 1.71 | (1.33–2.19) |
| CPI | 0.98 | (0.69–1.39) |
| NI | REF | — |
| Interventions | ||
| BCG (0–9 yr) | 0.35 | (0.19–0.66) |
| BCG (10–19 yr) | 0.72 | (0.35–1.51) |
| BCG (20+ yr) | 0.95 | (0.49–1.86) |
Definition of abbreviations: BCG = bacillus Calmette-Guérin; CI = confidence interval; CPI = smear-negative and culture-positive index cases; NI = smear-negative and culture-negative index cases; RR = risk ratio; SCPI = smear-positive and culture-positive index cases.
Table shows RR and 95% CIs for risk factors for coprevalent and incident tuberculosis disease. Statistically significant responses (P < 0.05) are highlighted in bold. Coefficients for BCG vaccination are presented relative to nonvaccinated individuals in each age group. Because coprevalent tuberculosis cases could not be targeted for isoniazid preventive therapy, we adjust for the effect of isoniazid preventive therapy among this group but do not present this coefficient.