Comment on ‘Randomized Intervention Study of Solar Disinfection of Drinking Water’

In their recent paper du Preez et al. report the “first trial to show evidence of the effects of SODIS on childhood anthropometry, with a statistically significant difference in the height-for-age of children on SODIS (0.8 cm 95% CI 0.7 cm to 1.6 cm, P = 0.031) compared with children in the control
group”. The authors claim that their findings should then alleviate concerns that the reported lower rates of diarrhea in users of SODIS is largely or totally due to reporting (courtesy) bias. In making this claim the assumption is that that measurement of height of children or length of babies is an objective outcome measure. It is not.

Comment on ‘Randomized Intervention Study of Solar Disinfection of Drinking Water in the Prevention of Dysentery in Kenyan Children Aged Under 5 Years’. P. R. Hunter, J. Bartram, S. Cairncross. 2012. Environmental Science & Technology 46:5, pp. 3035–3035. doi.org/10.1021/es204500c