Table 4.
Prevalence of and 95% confidence intervals (CI) for HIV seropositivity among 7,116 adult men in Zambia according to method of adjustment for HIV testing non-participation.
| Prevalence | (95% CI) | |
|---|---|---|
| Unadjusted | ||
| Complete case analysis | 12.2% | (11.2%, 13.1%) |
|
| ||
| Adjusteda | ||
| Inverse probability weighting | 12.4% | (11.5%, 13.3%) |
| Outcome regression | 12.5% | (11.8%, 13.2%) |
| Doubly robust estimator | 12.5% | (11.6%, 13.4%) |
| Heckman-type selection | 21.0% | (19.8%, 22.2%) |
| Instrumental variable | ||
| Fixed effects | 21.1% | (16.2%, 25.9%) |
| Mixed effects | 21.2% | (12.6%, 29.8%) |
a
All adjustment methods considered the following set of covariates: age (in 5-year categories), wealth (in quintiles), educational attainment (in years) and location type of household.