Table 3.
Association of seasons with water quality and GI health risk
| Seasons | Total valid samples (N = 240) | Water quality | GI health risk | |||||
|---|---|---|---|---|---|---|---|---|
| Potable (N = 40) | Polluted (N = 200) | P value | No risk (N = 40) | Low risk (N = 87) | High risk (N = 113) | P Value | ||
| Seasons | 0.055* | 0.053* | ||||||
| Fall (%) | 60 (25) | 16 (40) | 44 (22) | 0.016** | 16 (40) | 24 (27.6) | 20 (17.7) | 0.016*** |
| Winter (%) | 42 (17.5) | 7 (17.5) | 35 (17.5) | 1.0** | 7 (17.5) | 17 (19.5) | 18 (15.9) | 0.8*** |
| Spring (%) | 38 (15.8) | 7 (17.5) | 31 (15.5) | 0.8** | 7 (17.5) | 14 (16.1) | 17 (15) | 0.9*** |
| Summer (%) | 100 (41.7) | 10 (25) | 90 (45) | 0.019** | 10 (25) | 32 (36.8) | 58 (51.3) | 0.008*** |
Fall september–november, Winter december–february, Spring march–april, Summer may–august, GI gastrointestinal
*P value for overall effect of season in model
**P value comparing percentages of potable vs. polluted samples collected in a specific season against all other seasons
***P value comparing percentages of no risk, low risk and high risk samples collected in a specific season against all other seasons