Legesse 2002.

Methods	Design: parallel group randomized trial Duration of study: November 2000 Follow‐up: 21 days
Participants	Country: Ethiopia Setting: community Number included in study: 520 Age: 2–80 years Sex: 221 male, 299 female Inclusion criteria: not reported Exclusion criteria: not reported Lost at follow‐up: 52 (11.0%) Number positive for A lumbricoides: 387 Number included in review: 387
Interventions	Treatment strategy: screening and treat all included participants Group 1: mebendazole 100 mg twice a day for 3 days (n = 153) Group 2: albendazole 400 mg single dose (n = 234)
Outcomes	Outcomes included:Ascaris prevalence pre‐ and post‐treatment, cure rates, pre‐ and post‐treatment GM epg, ERR, adverse events Outcomes not included in review: anthelmintic efficacy for Trichuris andS mansoni
Notes	Diagnostic technique: Kato‐Katz Funding support: not reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Quote: "A sequentially numbered list of individuals positive for Ascaris lumbricoides and/or Trichuris trichiura infections was prepared. The list was randomly divided into treatment group using random numbers obtained from a random number table."
Allocation concealment (selection bias)	Unclear risk	Details not reported.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Different treatment schedule.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Details not reported.
Incomplete outcome data (attrition bias) All outcomes	Low risk	52 (11.0%) participants lost at follow‐up and not included in analysis.
Selective reporting (reporting bias)	Low risk	All stated outcome were reported.
Other bias	Low risk	No other obvious source of bias.