Environmental Engineering Reference
In-Depth Information
and discrepancies between community-based fi eld workers' and supervisors' records
were found for fi ve (0.5%) of all visits.
Baseline Characteristics
At baseline the households in the different study arms were well balanced on multiple
other factors suggesting successful randomization (Table 1). The main types of water
sources for household chores and drinking were similar in both arms as was the dis-
tance to the source (median distance 50 m and 30 m in the control and intervention
arms, respectively). Storing water for longer than 2 d was more common among the
intervention (26.8%) than the control arm (13.9%). Nearly 30% of all households re-
ported treating water regularly before drinking. Boiling was the most common water
treatment before the trial (20.2% in both arms).
Table 1. Baseline community and household characteristics of a community-randomized trial of
SODIS.
Category
Description
n Chil-
dren or
House-
holds
Control 11
Clusters
n Chil-
dren or
House-
holds
Interven-
tion 11
Clusters
Demography
Community size: n of households [mean (SD)] −
50 (20)
58 (20)
Household size: n of household members [mean
(SD)]
N=222
6.2 (2.1)
N=262
6.3 (2.6)
n of children < 5 y per household [mean (SD)]
1.8 (0.7)
1.7 (0.8)
n of children < 5 y per community [mean (SD)] −
35.3 (6.6)
41.4 (9.9)
Female household head [n (%)]
20 (9.0)
14 (5.4)
Closest child caregiver (female)
223 (99.5) −
266 (99.6)
Age of closest child caregiver (y) [mean (SD)]
31(9)
30 (10)
n of children < 1 y
65 (4.7)
67 (4.1)
n of children < 5 y
369 (26.6) −
426 (25.9)
Education
Household chief: reported years of education
[mean (SD)]
N=167
4.1 (2.6)
N=178
4.2 (2.4)
Closest child caregiver: reported years of educa-
tion [mean SD)]
N=179
2.5 (1.9)
N=198
2.7 (1.8)
Socio-
economic
variables
Main occupation of the household chief as farmer
N=208
180 (86.5)
N=228
207 (90.8)
Ownership of truck, car, or motorbike
12 (5.8)
14 (6.2)
Ownership of radio
129 (86.1) −
194 (85.1)
Ownership of bicycle
109 (52.4) −
121 (53.1)
Ownership of television
24 (11.5)
15 (6.6)
n of rooms in the house [mean (SD)]
2.9 (1.4)
2.8 (1.2)
 
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