Table 4 Final multivariable logistic regression of young mother’s HIV infection using the development and validation data sets for Model Three from the 2010, 2011–2012, and 2012–2013 prevention of mother-to-child transmission surveys, South Africa
Development Data Set (N = 4676) | Validation Data Set (N = 2690) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Risk factor | Coefficient | Odds Ratio (95% CI) | P-value | Score (coefficient*10) | Coefficient | Odds Ratio (95% CI) | P-value | Score (coefficient*10) | |
Age of mother (years) | < 20 | 0 | 1 | - | 0 | 0 | 1 | - | 0 |
20–24 | 0.98 | 2.67 (1.98–3.61) | < 0.001 | 10 | 0.85 | 2.34 (1.82–3.02) | < 0.001 | 9 | |
Planned pregnancy | No | 0.43 | 1.53 (1.15–2.03) | 0.003 | 4 | ||||
Yes | 0 | 1 | - | 0 | |||||
Knowledge of weeks pregnant when received last HIV test result | No | 0 | 1 | - | 0 | ||||
Yes | 0.92 | 2.52 (1.56–4.06) | < 0.001 | 9 | |||||
Knowledge of HIV status of child’s father | No | 0.81 | 2.26 (1.76–2.89) | < 0.001 | 8 | 0.62 | 1.86 (1.50–2.32) | < 0.001 | 6 |
Yes | 0 | 1 | - | 0 | 0 | 1 | - | 0 | |
Income from family | No | 0.38 | 1.46 (1.04–2.06) | 0.029 | 4 | ||||
Yes | 0 | 1 | - | 0 | |||||