Table 2.
Results of negative binomial regression.
| Variable | Category | IRR (95% CI) | p value |
|---|---|---|---|
| Age | 15-19 | 1 | |
| 20-24 | 2.34 (0.46, 11.8) | 0.304 | |
| 25-29 | 3.95 (0.91, 17.15) | 0.067 | |
| 30-34 | 4.56 (1.07, 19.34) | 0.040∗ | |
| 35-39 | 4.21 (0.97,18.28) | 0.055 | |
| 40-44 | 4.61(1.03, 20.66) | 0.046∗ | |
| 45-49 | 2.47 (0.49, 12.51) | 0.275 | |
|
| |||
| Educational attainment | No education | 1 | |
| Incomplete primary | 0.05 (0.02, 0.12) | <0.001∗ | |
| Complete primary | 0.17 (0.07, 0.42) | <0.001∗ | |
| Incomplete secondary | 0.52 (0.15,1.84) | 0.312 | |
| Complete secondary | 0.53 (0.18,1.58) | 0.254 | |
| Higher | 10.04(1.12,89.71) | 0.039∗ | |
|
| |||
| Wealth index | Poorest | 1 | |
| Poorer | 0.06 (0.03,0.12) | <0.001∗ | |
| Middle | 0.12 (0.06, 0.24) | <0.001∗ | |
| Richer | 0.26 (0.14,0.5) | <0.001∗ | |
| Richest | 0.45 (0.24,0.86) | 0.016∗ | |
|
| |||
| Place of residence | Rural | 1 | |
| Urban | 0.615 (0.56-0.67) | <0.001∗ | |
∗Significance at 5%. IRR: incidence rate ratio.