Table 3.
Linear log odds ratios (OR) and 95% confidence intervals (CI) for selection bias in HIV seropositivity due to nonignorable missingness among 7,116 adult men in Zambia, 2007.
| Log OR | Selection bias (95% CI) |
Pa | |
|---|---|---|---|
| Intercept | −0.300 | (−3.542, 2.942) | 0.86 |
|
| |||
| Age (years) | 0.16 | ||
| 55 to 59 | 0.056 | (−1.946, 2.059) | |
| 50 to 54 | −1.113 | (−3.166, 0.941) | |
| 45 to 49 | −0.219 | (−2.198, 1.760) | |
| 40 to 44 | 0.837 | (−0.933, 2.607) | |
| 35 to 39 | −0.414 | (−2.228, 1.400) | |
| 30 to 34 | −0.342 | (−2.050, 1.367) | |
| 25 to 29 | −0.281 | (−1.898, 1.338) | |
| 20 to 24 | −0.850 | (−2.392, 0.693) | |
| 15 to 19 | (ref) | – | |
|
| |||
| Educational attainment (years) | −0.102 | (−0.178, −0.026) | 0.01 |
|
| |||
| Wealth quintile | – | 0.52 | |
| 5th (wealthiest) | −0.686 | (−2.529, 1.156) | |
| 4th | −0.579 | (−2.320, 1.162) | |
| 3rd | 0.166 | (−1.543, 1.875) | |
| 2nd | 0.142 | (−1.545, 1.830) | |
| 1st (poorest) | (ref) | – | |
|
| |||
| Location type of household | 0.44 | ||
| Countryside | 0.025 | (−1.021, −1.021) | |
| Town | −0.326 | (−1.148, 0.496) | |
| Small city | −0.923 | (−2.112, 0.267) | |
| Capital, large city | (ref) | – | |
a
P-value from Wald χ2 test.