Table 2.
Unweighted and Weighted Risk Ratios (RRs), Risk Differences (RDs) and 95% CIs for the effect of fertility intentions on quarterly attendance at HIV clinical care visits among 850 women with HIV taking ART in Johannesburg, 2009–2011
| Unweighted | Weighted | |||
|---|---|---|---|---|
| RR (95% CI) | RD (95% CI) | RR (95% CI) | RD (95% CI) | |
| Short-term childbearing plans a | ||||
| yes | 0.98 (0.96, 1.00) | −0.02 (−0.05, 0.01) | 0.99 (0.96, 1.02) | −0.01 (−0.05, 0.02) |
| no | REF | REF | REF | REF |
| Any childbearing plans b | ||||
| yes | 1.00 (0.97, 1.03) | 0.00 (−0.04, 0.03) | 1.01 (0.96, 1.06) | 0.01 (−0.05, 0.06) |
| no | REF | REF | REF | REF |
| Currently trying to conceive (time-varying) c | ||||
| yes | 1.01 (0.98, 1.04) | 0.01 (−0.02, 0.04) | 1.03 (1.00, 1.06) | 0.03 (0.00, 0.05) |
| no | REF | REF | REF | REF |
Abbreviations. RR: risk ratio; RD: risk difference; CI: confidence interval; ART: Antiretroviral therapy
Weighted effect estimates account for censoring (mean=1.01; range 0.37–2.26) and confounding by age (≤30, >30 years), marital status (married or co-habitating/not married or co-habitating), time on ART (initiated ART ≤3 vs. >3 months before enrollment), partner fertility intentions (no partner, partner does not desire a/another child, partner unsure, partner desires a/another child) and any prior living children (yes/no) (mean=0.99; range 0.49–4.18)
Weighted effect estimates account for censoring (mean=1.00; range 0.40–1.73) and confounding by age (≤30, >30 years), marital status (married or co-habitating/not married or co-habitating), time on ART (initiated ART ≤3 vs. >3 months before enrollment), partner fertility intentions (no partner, partner does not desire a/another child, partner unsure, partner desires a/another child) and any prior living children (yes/no) (mean=0.97; range 0.34–3.19)
Weighted effect estimates account for censoring (mean=1.00; range 0.42–1.86), selection (mean=1.04; range 0.54–1.65), and confounding by age (≤30, >30 years), marital status (married or co-habitating/not married or co-habitating), time on ART (initiated ART ≤3 vs. >3 months before enrollment), partner fertility intentions (no partner, partner does not desire a/another child, partner unsure, partner desires a/another child) and any prior living children (yes/no) (mean=0.97; range 0.26–1.93)