Table 3.
Bivariate and multivariate analyses of relationships between baseline characteristics and preterm delivery among pregnant women with HIV infection (n=113).
| Risk factor | Bivariate analysis | Multivariate analysis | ||
|---|---|---|---|---|
|
| ||||
| OR (95% CI) | P value | aOR (95% CI) | P value | |
| Age, y | 0.992 | |||
| <35 (n=55) | 0.97 (0.44–5.11) | NA | ||
| ≥35 (n=58) | 1.00 (ref.) | NA | ||
| Parity | 0.026 | 0.110 | ||
| Nulliparous (n=52) | 0.34 (0.73–3.26) | 0.81 (0.40–6.01) | ||
| Multiparous (n=61) | 1.00 (ref.) | 1.00 (ref.) | ||
| Occupation | 0.082 | |||
| Professional (n=47) | 1.46 (1.25–7.68) | NA | ||
| Nonprofessional (n=66) | 1.00 (ref.) | NA | ||
| Education | 0.777 | |||
| ≥High school (n=103) | 1.21 (0.32–4.55) | NA | ||
| <High school (n=10) | 1.00 (ref.) | NA | ||
| BMI | 0.618 | |||
| ≤24.9 (n=45) | 1.51 (1.16–9.49) | NA | ||
| ≥25.0 (n=68) | 1.00 (ref.) | NA | ||
| Duration of HIV diagnosis, mo | 0.012 | 0.087 | ||
| >12 (n=88) | 4.71 (1.33–7.61) | 1.34 (0.96–19.34) | ||
| ≤12 (n=25) | 1.00 (ref.) | 1.00 (ref.) | ||
| ART duration, mo | 0.007 | 0.161 | ||
| <10 (n=10) | 4.18 (2.24–7.83) | 3.14 (2.11–33.59) | ||
| ≥10 (n=103) | 1.00 (ref.) | 1.00 (ref.) | ||
| CD4+ count, cells/mm3 | 0.003 | 0.027 | ||
| <350 (n=50) | 9.46 (3.33–15.18) | 8.11 (4.21–15.50) | ||
| ≥350 (n=63) | 1.00 (ref.) | 1.00 (ref.) | ||
| Viral load, copies/mL | 0.139 | |||
| ≥1000 (n=34) | 3.11 (1.22–29.47) | NA | ||
| <1000 (n=79) | 1.00 (ref.) | NA | ||
| Selenium level | <0.001 | 0.031 | ||
| Low (n=23) | 11.04 (8.84–21.9) | 7.61 (4.37–18.89) | ||
| Normal (n=90) | 1.00 (ref.) | 1.00 (ref.) | ||
Abbreviations: OR, crude odds ratio; CI, confidence interval; aOR, adjusted odds ratio; BMI, body mass index (calculated as weight in kilograms divided by the square of height in meters); ART, antiretroviral treatment.