TABLE 3.
Final multivariable model for giardiasis, based on data for 99 cases and 204 controlsa
| Variables included | Adjusted OR (95% CI)b | P |
|---|---|---|
| Traveling abroad (outside UK) | 9.59 (2.75–33.51) | 0.001 |
| Swimming in swimming pool | 2.79 (1.40–5.54) | 0.002 |
| Doing gardening | 0.21 (0.09–0.54) | 0.001 |
| Weekly frequency of raw fruit consumption (per event) | 0.85 (0.78–0.93) | 0.001 |
| Eating salad or raw vegetables | 0.35 (0.16–0.79) | 0.009 |
| Male | 0.78 (0.38–1.58) | 0.539 |
| Age | 0.179 | |
| 0–4 yr | Reference | |
| 5–14 yr | 0.74 (0.18–3.03) | |
| 15–44 yr | 2.32 (0.88–6.12) | |
| 45–64 yr | 1.22 (0.45–3.32) | |
| ≥65 yr | 1.79 (0.59–5.42) |
a
The numbers of cases and controls refer to those with complete variable data (e.g., without missing data for any of the variables retained in the model). Model statistics were as follows: model χ212 = 60.49, P < 0.001; Nagelkerke R2 = 0.25; Hosmer-Lemeshow χ28 = 13.24, P = 0.104.
b
OR, odds ratio; CI, confidence interval.