Table 3.
Multivariable logistic regression analysis of risk factors for filarial antigenaemia in the total population. Likelihood-ratio test for random effect vs fixed effect model, final model (P = 0.005)
| Variable | Category | Full model | Final model | ||
|---|---|---|---|---|---|
| Adj OR (95% CI) | P | Adj OR (95% CI) | P | ||
| Age (ref: 5–10 years-old) | 11–20 | 2.72 (1.42–5.20) | 0.002 | 3.03 (1.59–5.75) | 0.001 |
| 21–35 | 5.19 (2.53–10.65) | <0.001 | 5.46 (2.68–11.12) | 0.001 | |
| > 35 | 8.23 (4.05–16.73) | <0.001 | 9.12 (4.47–18.61) | <0.001 | |
| Sex (ref: female) | Male | 1.82 (1.25–2.66) | 0.002 | 1.75 (1.20–2.53) | 0.003 |
| Village (ref: Mbumkimi) | Misay | 0.92 (0.54–1.56) | 0.758 | ||
| Bednets (ref: yes) | No | 1.46 (0.99–2.14) | 0.056 | 1.57 (1.06–2.33) | 0.023 |
| Latrines (ref: no) | Yes | 0.88 (0.54–1.43) | 0.609 | ||
| Fishing (ref: no) | Yes | 1.27 (0.83–1.94) | 0.277 | ||
| Occasional stay in the bush (ref: no) | Yes | 1.35 (0.86–2.11) | 0.186 | 1.45 (0.92–2.28) | 0.105 |
| Agriculture activity (ref: no) | Yes, same side | 2.10 (1.07–4.11) | 0.031 | 2.15 (1.11–4.17) | 0.024 |
| Yes, other side | 2.07 (1.15–3.71) | 0.015 | 2.21 (1.25–3.90) | 0.006 | |
| Previous AH treatment (ref: yes) | No | 1.77 (1.13–2.77) | 0.012 | 1.82 (1.16–2.87) | 0.010 |
| na | 2.10 (0.89–4.96) | 0.090 | 2.05 (0.84–4.94) | 0.111 | |
| Population density (ref: low) | Intermediate | 0.99 (0.57–1.71) | 0.969 | ||
| High | 1.31 (0.77–2.25) | 0.322 | |||
| na | 1.51 (0.59–3.87) | 0.387 | |||
| Distance to Nsitim River (ref: > 400 m) | 300–400 m | 1.40 (0.84–2.34) | 0.198 | 1.41 (0.89–2.21) | 0.140 |
| 0–300 m | 2.44 (0.99–6.01) | 0.052 | 2.78 (1.14–6.74) | 0.024 | |
| Distance to Kwilu River (ref: > 400 m) | 300–400 m | 0.64 (0.32–1.30) | 0.216 | ||
| 0–300 m | 1.23 (0.64–2.36) | 0.543 | |||
| Number of household members | 1.04 (0.93–1.18) | 0.475 | |||
Abbreviations: Adj OR, adjusted odds ratio; AH, anthelmintic drug; CI, confidence interval; na, not available