Table 4.
Logistic regression analysis of Plasmodium vivax infection explanatory variables
| P. vivax (molecularly diagnosed; 98.5% sub-microscopic) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Univariable model | Multivariable model | ||||||||
| N* | PvPR† | OR | 95% CI‡ | P | AOR | 95% CI‡ | P | ||
| Sex | Female | 1,086 | 6.2% | Reference | Not selected | ||||
| Male | 977 | 7.2% | 1.17 | (0.83–1.66) | 0.3700 | ||||
| Age (year) | 2,061 | 6.6% | 0.99 | (0.98–1.00) | 0.2600 | ||||
| Exposure (year)§ | 2,050 | 6.6% | 0.89 | (0.85–0.92) | < 0.0001 | ||||
| Ethnicity‖ | Other | 103 | 4.9% | Reference | Reference | ||||
| Betsileo | 455 | 5.7% | 1.55 | (0.52–6.55) | 0.3600 | 0.98 | (0.32–4.27) | 0.0074 | |
| Merina | 1,505 | 7.0% | 1.92 | (0.70–7.92) | 2.01 | (0.71–8.44) | |||
| Water distance (m)¶ | 2,063 | 6.6% | 1.00 | (1.00–1.00) | 0.4100 | Not selected | |||
| Insecticide-treated bednet ownership | No | 242 | 14.9% | Reference | Reference | ||||
| Yes | 1,810 | 5.6% | 0.34 | (0.23–0.51) | < 0.0001 | 0.46 | (0.30–0.71) | 0.0004 | |
| Health center | Center | 775 | 0.8% | Reference | Reference | ||||
| North | 492 | 15.0% | 22.69 | (10.64–58.85) | < 0.0001 | 22.68 | (10.51–59.26) | < 0.0001 | |
| South | 796 | 7.2% | 9.89 | (4.59–25.77) | 8.41 | (3.88–22.03) | |||
| Fever# | No | 1904 | 6.4% | Reference | Not selected | ||||
| Yes | 111 | 9.9% | 1.62 | (0.80–2.98) | 0.1400 | ||||
Only two P. vivax infections were identified by light microscopy.
*
–# See notes from Table 3.