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Table 4 General association of lifestyle with season and contamination without splitting into separate time periods

From: Comparison of coliform contamination in non-municipal waters consumed by the Mennonite versus the non-Mennonite rural populations

Characteristics

Total

Lifestyle

Mennonite

Non-Mennonite

P Value

Total water samples (%)

303

74 (24.4)

229 (75.6)

0.3

 Not-valid (%)

63 (20.8)

12 (16.2)

51 (22.3)

 

 Valid (%)

240 (79.2)

62 (25.8)

178 (74.2)

 

 Mean holding time in hours (95 % CI)

30 (23.1–36.9)

32.6 (13.9–51.3)

29.2 (22.2–36.2)

0.7

Seasons

   

0.007

 Fall (%)

82 (27.1)

13 (17.6)

69 (30.1)

0.034

 Winter (%)

52 (17.2)

18 (24.3)

34 (14.8)

0.060

 Spring (%)

47 (15.5)

18 (24.3)

29 (12.7)

0.016

 Summer (%)

122 (40.3)

25 (33.8)

97 (42.4)

0.2

Contamination scores in valid samples (N = 240)

 Water Quality

   

0.4

  Potable (%)

40 (16.7)

8 (12.9)

32 (18)

 

  Polluted (%)

200 (83.3)

54 (87.1)

146 (82)

 

 GI health risk

   

0.7

  No risk (%)

40 (16.7)

8 (12.9)

32 (18)

 

  Low risk (%)

87 (36.3)

23 (37.1)

64 (36)

 

  High risk (%)

113 (47.1)

31 (50)

82 (46.1)

 

Contaminant levels

 Mean total coliform CFUs/100 ml (95 % CI)

353.3 (267.2–439.4)

285.5 (200.7–370.4)

547.8 (325.8–769.9)

0.3

 Mean E. coli CFUs/100 ml (95 % CI)

69.3 (35.1–103.4)

91.8 (9.3–174.3)

61.4 (25.4–97.5)

0.8

  1. CI confidence interval, GI gastrointestinal, Fall september–november, Winter december–february, Spring march–april, Summer may–august