Glasses of unboiled tap water/day | Case n = 101 (%)* | Control n = 121 (%)* | Matched OR | 95% CI |
---|---|---|---|---|
*Data regarding daily consumption of unboiled tap water were not available for 12 cases and 120 controls. | ||||
0–2 | 9 (9) | 43 (35) | Ref | – |
3–4 | 23 (23) | 32 (26) | 1.4 | 0.2 to 9.5 |
5–6 | 28 (28) | 29 (24) | 3.9 | 1.1 to 22.5 |
>7 | 41 (41) | 18 (15) | 12.3 | 1.9 to 552.4 |