Table 3. Risk factors of sub-patent P. falciparum infections*.
| Univariate analysis | Multivariate analysis | |||
|---|---|---|---|---|
| Variable | HR (95% CI) | p value | HR (95% CI) | p value |
| Age category | ||||
| < 4.9 years | 1 | 1 | ||
| 5–15 years | 1.39 (1.07–1.81) | 0.01 | 1.35 (1.04–1.6) | 0.01 |
| 16–30 years | 1.49 (1.25–1.78) | < 0.01 | 1.53 (1.23–1.89) | < 0.01 |
| ≥30 years | 1.3 (0.9–1.89) | 0.07 | 1.47 (0.9–1.91) | 0.1 |
| Gender | ||||
| Males | 1 | 1 | ||
| Female | 0.78 (0.7–1.15) | 0.31 | 0.79 (0.56–1.13) | 0.1 |
| Anaemia | ||||
| Normal | 1 | 1 | ||
| Mild | 1.4 (1.2–1.6) | < 0.01 | 1.4 (1.23–1.6) | < 0.01 |
| Moderate | 1.3 (0.9–1.7) | 0.1 | 1.3 (0.9–1.7) | 0.1 |
| Severe | 1.2 (0.8–1.9) | 0.3 | 1.3 (0.8–2.0) | 0.2 |
| LLIN use at night | ||||
| No | 1 | |||
| Yes | 0.9 (0.6–1.6) | 0.21 | - | - |
| Sleep outdoors | ||||
| No | 1 | |||
| Yes | 0.9 (0.5–0.80) | 0.8 | - | - |
| Travelled outside the village | ||||
| No | 1 | |||
| Yes | 1.4 (0.7–2.9) | 0.38 | - | - |
* Sub-patent infections: positive by nested PCR and negative by microscopy in asymptomatic individuals