Environmental Engineering Reference
In-Depth Information
Table 2.
(Continued)
Health Condition
Class or Parameter
n
Control
n
Intervention
Diarrhoea prevalence
Age class
Children
Mean (50)
Children Mean (50)
n Days ill/(child x year)
< 1
16
27.4 (28.3)
15
42.3 (40.7)
1-2
67
31.4 (42.2)
70
23.0 (26.1)
2-3
67
19.0 (47.5)
82
16.4 (28.4)
3-4
77
11.7 (24.5)
75
7.3 (9.7)
4-5
71
9.5 (15.1)
80
6.2 (12.4)
5-6
50
6.9 (11.8)
53
7.7 (10.4)
Total
a
349
16.5 (32.8)
376
13.5 (22.4)
Diarrhoea illness
Days spent ill
Children
Percent
Children Percent
0 d
97
27.8
126
33.5
1-2 d
50
14.3
42
11.2
3-7 d
91
26.1
80
21.3
8-14 d
49
14.0
59
15.7
15-21 d
27
7.7
33
8.8
22-40 d
18
5.2
21
5.6
> 40 d
17
4.9
15
4.0
Total
349
100
376
100
Diarrhoea illness duration
Episode duration
Episodes
Percent
Episodes Percent
1 day
250
28.2
191
23.6
2-3 d
303
34.2
292
36.1
4-7 d
258
29.1
250
30.9
8-13 d
54
6.1
59
7.3
> 13 d
22
2.5
16
1.9
Total
887
100
808
100
Prevalence of other symptoms
(d/(child xyear])
Children
Mean (50)
Children Mean (50)
Vomit 349 5.5 (13.2) 376 4.0 (8.9)
Fever 349 21.0 (33.0) 376 15.1 (19.8)
Cough 349 41.9 (48.3) 376 30.9 (39.4)
Eyes irritation 349 12.8 (29.8) 376 8.3 (19.5)
' Includes one child per treatment arm with unknown age. SO, standard deviation. doi:1 0.1371/journal.pmed.1
000125.t002
A multivariable model adjusting for age, sex, baseline-existing water treatment
practices, and child hand washing was consistent in its estimate of effect (RR = 0.74,
95% CI 0.50-1.11). We repeated the analysis by including confounding covariates
in the order of occurrence of the variables in Table 3 to confi rm that the conclusions
were not sensitive to the choice of covariates. None of the models yielded signifi cant
results for the effect of SODIS (all p-values>0.1) or resulted in meaningful changes
in estimates of ORs. Figure 2 shows the relationship between study time and diarrhea
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