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Table 1

Water use characteristics of both filter groups

Ceramic filter (n = 20)Nerox filter (n = 210)Significance test
Type of water supply    
 Irrigation canal 13 (65%) 182 (87%) χ2 = 51 P < 0.001 
 Seepage water (well or hand pump) – 25 (12%) 
 Village pond 7 (35%) 3 (1%) 
What do you use the filtered water for?    
 Drinking 11 (55%) 152 (72%) χ2 = 2.7 P = 0.10 
 Drinking + cooking 9 (45%) 58 (28%) 
How often do you fetch water?    
 More than once a day 3 (15%) 16 (8%) χ2 = 2.3 P = 0.69 
 Once a day 17 (85%) 183 (87%) 
 Every second day – 11 (6%) 
How often did you clean the filter?    
 Once per day 17 (85%) 192 (91%) χ2 = 3.1 P = 0.69 
 Every second day 3 (15%) 12 (6%) 
 Once a week – 4 (2%) 
 Once a month – 1 (0.5%) 
 Never – 1 (0.5%) 
When did you stop using the filter?    
 Still using it – 21 (10%) χ2 = 10.2 P = 0.07 
 2 weeks to 1 month ago 5 (25%) 41 (20%) 
 1 month to 2 months ago 7 (35%) 47 (22%) 
 2 months to 3 months ago 6 (30% 50 (24%) 
 More than 3 months ago 2 (10%) 52 (24%) 
Ceramic filter (n = 20)Nerox filter (n = 210)Significance test
Type of water supply    
 Irrigation canal 13 (65%) 182 (87%) χ2 = 51 P < 0.001 
 Seepage water (well or hand pump) – 25 (12%) 
 Village pond 7 (35%) 3 (1%) 
What do you use the filtered water for?    
 Drinking 11 (55%) 152 (72%) χ2 = 2.7 P = 0.10 
 Drinking + cooking 9 (45%) 58 (28%) 
How often do you fetch water?    
 More than once a day 3 (15%) 16 (8%) χ2 = 2.3 P = 0.69 
 Once a day 17 (85%) 183 (87%) 
 Every second day – 11 (6%) 
How often did you clean the filter?    
 Once per day 17 (85%) 192 (91%) χ2 = 3.1 P = 0.69 
 Every second day 3 (15%) 12 (6%) 
 Once a week – 4 (2%) 
 Once a month – 1 (0.5%) 
 Never – 1 (0.5%) 
When did you stop using the filter?    
 Still using it – 21 (10%) χ2 = 10.2 P = 0.07 
 2 weeks to 1 month ago 5 (25%) 41 (20%) 
 1 month to 2 months ago 7 (35%) 47 (22%) 
 2 months to 3 months ago 6 (30% 50 (24%) 
 More than 3 months ago 2 (10%) 52 (24%) 
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