Table 2 Association of coliform contamination with lifestyle in two time periods
Characteristics | Total valid samples (N=240) | Lifestyle | ||
|---|---|---|---|---|
Mennonite (N = 62) | Non-Mennonite (N = 178) | P value | ||
Period #1 (N) | 180 | 41 | 139 | |
Water quality | 0.8 | |||
Potable (%) | 33 (18.3) | 7 (17.1) | 26 (18.7) | |
Polluted (%) | 147 (81.7) | 34 (82.9) | 113 (81.3) | |
GI health risk | 0.2 | |||
No risk (%) | 33 (18.3) | 7 (17.1) | 26 (18.7) | |
Low risk (%) | 70 (38.9) | 21 (51.2) | 49 (35.3) | |
High risk (%) | 77 (42.8) | 13 (31.7) | 64 (46.0) | |
Mean total coliform CFUs/100 ml (95 % CI) | 119.9 (108.1-131.6) | 98 (75.2–120.9) | 126.3 (110.9–141.7) | 0.1 |
Mean E. coli CFUs/100 ml (95 % CI) | 30.8 (22.7–38.9) | 15.2 (3.4–27.0) | 35.4 (25.4–45.3) | 0.052 |
Period #2 (N) | 60 | 21 | 39 | |
Water quality | 0.2 | |||
Potable (%) | 7 (11.7) | 1 (4.8) | 6 (15.4) | |
Polluted (%) | 53 (88.3) | 20 (95.2) | 33 (84.6) | |
GI health risk | 0.012 | |||
No risk (%) | 7 (11.7) | 1 (4.8) | 6 (15.4) | 0.2 |
Low risk (%) | 17 (28.3) | 2 (9.5) | 15 (38.5) | 0.018 |
High risk (%) | 36 (60.0) | 18 (85.7) | 18 (46.2) | 0.012 |
Mean total coliform CFUs/100 ml (95 % CI) | 1053.6 (915.8–1191.4) | 1426 (1154.9–1697.0) | 853.1 (698.9–1007.2) | 0.020 |
Mean E. coli CFUs/100 ml (95 % CI) | 184.8 (119.7–249.9) | 241.4(106.1–376.6) | 154.3 (80.5–228.2) | 0.014 |