Table 4: Cox proportional hazards regression-determinants of virological failure.
| Variable e | Hazard ratio | 95% CI (HR) | P-value |
| Age group | |||
| Paediatric (< 15 years) | (base) | ||
| Adult (≥ 15 years) | 1.61 | [1.19; 2.16] | 0.002* |
| Gender | |||
| Female | (base) | ||
| Male | 1.04 | [0.89; 1.21] | 0.609 |
| Regimen type | |||
| EFV | (base) | ||
| NVP | 0.82 | [0.70; 0.96] | 0.012* |
| HIV stage | |||
| Stage 1 | (base) | ||
| Stage 2 | 0.94 | [0.76; 1.16] | 0.560 |
| Stage 3 | 0.94 | [0.77; 1.14] | 0.517 |
| Stage 4 | 0.92 | [0.70; 1.22] | 0.586 |
| Any non-communicable disease? | |||
| No | (base) | ||
| Yes | 1.08 | [0.87; 1.34] | 0.466 |
| Adherence to ART | |||
| No | (base) | ||
| Yes | 0.74 | [0.62; 0.87] | < 0.001* |
| Baseline BMI | |||
| Normal | (base) | ||
| Obese | 0.95 | [0.76; 1.19] | 0.671 |
| Overweight | 1.05 | [0.86; 1.28] | 0.628 |
| Underweight | 1.09 | [0.82; 1.46] | 0.540 |
*significant. Shows Cox Proportional Hazards regression model evaluating the adjusted effect of the patient's baseline characteristics on the risk of virological failure at the next time.