Study	Reason for exclusion
Araujo 1987	Not a RCT.
Baird 2011	Not a comparison of deworming with placebo or no treatment.
Beasley 1999	Treatment regimen comprised of albendazole for soil‐transmitted helminths and praziquantel against schistosomiasis vs placebo.
Bhargava 2003	Treatment regimen comprised of albendazole for soil‐transmitted helminths and praziquantel against schistosomiasis vs placebo.
Bhutta 2009	Population with significant comorbidity – 6 to 24 month old children with severe anaemia (<70 g/L). In population with severe anaemia.
Boivin 1993	Factorial‐designed RCT with children allocated to deworming and iron supplementation, and in which the analysis compares the results for the levamisole and iron group against all the other groups combined. Thus the analysis is confounded by the iron co‐intervention (Included in the Dickson 2000a Cochrane Review).
Cooper 2006	Trial of allergy with no outcomes of interest.
Cowden 2000	Not a RCT.
Croke 2014	3% (1097/37,165) of randomized participants were evaluated in 46% (22/48) of the original parishes from the initial Alderman 2006 (Cluster) trial. All children were offered treatment after the initial trial, and therefore potentially all of these children received treatment for deworming.
Diouf 2002	Intervention comprised mebendazole, vitamin A, and iron supplementation and metronidazole as a combined intervention vs placebo.
Evans 1986	Treatments randomized, but some placebo groups accessed treatment. Analysis was by the treatment received, and randomization was ignored (included in the Dickson 2000a Cochrane Review).
Fernando 1983	2 villages allocated to treatment or no treatment on the basis of a coin toss. Essentially a cluster‐RCT with 2 large clusters (Included in the Dickson 2000a Cochrane Review, which reported that no conclusions could be drawn from the results due to selective reporting).
Forrester 1998	Treatment regimen comprised of 3 days of albendazole vs 1 day of albendazole and 2 days of placebo vs 1 day of pyrantel and 2 days of placebo.
Friis 2003	Combined treatment regimen albendazole for soil‐transmitted helminths and praziquantel for Schistosoma mansoni vs placebo.
Gilgen 2001	Population consisted of adults.
Gupta 1982	Only two units of allocation for relevant comparison. Children randomly divided into 4 groups, "taking care that age distribution was similar in each group". The 4 groups were then allocated 1 of 4 different single treatment regimens; no details given.
Hadidjaja 1998	Cluster‐RCT with 2 units of allocation to mebendazole and placebo. Trial authors stated that there were differences in environmental sanitary conditions in the clusters (Included in the Dickson 2000a Cochrane Review, but it was noted that the groups were not comparable and there was high loss to follow‐up).
Hathirat 1992	Treatment regimen comprised of albendazole for soil‐transmitted helminths and iron vs placebo.
Jalal 1998	No relevant outcomes.
Jinabhai 2001a	Treatment regimen comprised of albendazole for soil‐transmitted helminths and praziquantel against schistosomiasis vs placebo.
Jinabhai 2001b	Treatment regimen comprised of albendazole for soil‐transmitted helminths and praziquantel against schistosomiasis vs placebo.
Karyadi 1996	Not a RCT.
Krubwa 1974	Not a RCT.
Kvalsvig 1991b	The researchers were unable to collect outcome data after treatment due to major floods in the area.
Latham 1990	Population with schistosomiasis treated with praziquantel.
Marinho 1991	Treatment regimen comprised of mebendazole and metronidazole vs placebo.
Mwaniki 2002	Treatment regimen albendazole for soil‐transmitted helminths and praziquantel for schistosomiasis vs placebo.
Ozier 2011	Not a comparison of deworming with placebo or no treatment.
Pollitt 1991	Not described as randomized; conference proceedings.
Rohner 2010	Treatment regimen albendazole for soil‐transmitted helminths and praziquantel for schistosomiasis vs placebo.
Steinmann 2008	No relevant outcomes.
Stephenson 1980	Treatment consisted of levamisole with no untreated controls.
Stephenson 1985	Treatment regimen metrifonate used to treat Schistosoma haematobium vs placebo.
Tanumihardjo 1996	No relevant outcomes.
Tanumihardjo 2004	The only randomization is the timing of the deworming medicine.
Taylor 2001	Treatment regimen albendazole for soil‐transmitted helminths and praziquantel for S. haematobium vs placebo.
Thein‐Hlaing 1991	3/21 intervention villages were not randomly allocated, and unclear how intervention and control villages were allocated as there was a large imbalance (8 intervention and 13 non‐intervention villages).
Uscátegui 2009	Trial in population with malaria.
Wright 2009	No relevant outcomes.
Yang 2003	Did not consider nutritional or cognitive outcome measures.