Variable | Level | OR (95% CI) | P |
---|---|---|---|
Frequency of washing container | Weekly | 1 | Â |
Monthly | 3.45 (1.16–10.29) | 0.026 | |
Never | 3.60 (0.93–13.95) | 0.064 | |
Total dissolved solids, TDS (log10 mg/l) |  | 8.60 (1.57–46.84) | 0.013 |
Dissolved oxygen, DO (mg/l) |  | 0.59 (0.34–1.00) | 0.052 |
pH |  | 2.01 (0.91–4.42) | 0.089 |