Table 3 Univariate and multivariate analysis for risk factors of Blastocystis infection.
From: Incidence and risk factors of Blastocystis infection in an orphanage in Bangkok, Thailand
Characteristics | No. positive for Blastocystis | Person-months of follow up | IR (100 person-months) | IRR (95% CI) | |||
|---|---|---|---|---|---|---|---|
| Â | Â | Â | Â | Crude | p value | Adjusted | p value |
Sex | Â | Â | Â | Â | Â | Â | Â |
   Male | 29 | 1491.1 | 1.9 | 1 |  | 1 |  |
   Female | 17 | 1128.9 | 1.5 | 0.8 (0.4-1.5) | 0.408 | 0.7 (0.3-1.5) | 0.366 |
Age (months) | 46 | 2620.0 | 1.8 | 1.04 (1.03-1.05) | < 0.001 | 1.04 (1.03-1.05) | < 0.001 |
Nutritional status | Â | Â | Â | Â | Â | Â | Â |
   Normal nutrition | 37 | 1653.9 | 2.2 | 1 |  | 1 |  |
   Undernutrition | 4 | 655.8 | 0.6 | 0.3 (0.1-0.8) | 0.006 | 0.3 (0.1-0.9) | 0.044 |
   Overnutrition | 4 | 215.9 | 1.9 | 0.8 (0.2-2.3) | 0.851 | 0.5 (0.1-2.5) | 0.417 |
HIV infection | Â | Â | Â | Â | Â | Â | Â |
   No | 34 | 2116.9 | 1.6 | 1 |  | 1 |  |
   Yes | 10 | 444.4 | 2.3 | 1.4 (0.6-2.9) | 0.352 | 1.7 (0.6-4.9) | 0.313 |
Infected childcare worker(s) in the room | Â | Â | Â | Â | Â | Â | Â |
   No | 16 | 1613.8 | 0.9 | 1 |  | 1 |  |
   Yes | 24 | 723.4 | 3.3 | 3.3 (1.7-6.7) | 0.002 | 3.1 (1.3-7.6) | 0.014 |