Thanks for sharing! I haven’t looked much into this, but it does seem a puzzle. Gun to my head, I would hazard a guess that (a) probably a lot of studies are underpowered to detect the smaller non-diarrheal effect sizes, and (b) a plausible mechanisms that may be worth looking more at is the parental channel (e.g. if WASH interventions make parents less ill → better care + more income and less malnutrition/​access to healthcare for children).
Hi Nick,
Thanks for sharing! I haven’t looked much into this, but it does seem a puzzle. Gun to my head, I would hazard a guess that (a) probably a lot of studies are underpowered to detect the smaller non-diarrheal effect sizes, and (b) a plausible mechanisms that may be worth looking more at is the parental channel (e.g. if WASH interventions make parents less ill → better care + more income and less malnutrition/​access to healthcare for children).