Wen 2008.

Methods	Design: parallel group randomized trial Duration of study: not reported Follow‐up: 30 days
Participants	Country: People's Republic of China Setting: community (multicentre) Age: 6–70 years Sex: 79 male, 125 female Number included in study: 816 Inclusion criteria: faecal egg‐positive farmers and children > 6 years of age from rural areas Exclusion criteria: other diseases such as hepatic, renal, and cardiovascular diseases; and pregnant or lactating women Follow‐up: 0 (0%) Number positive for A lumbricoides: 204 Number included in review: 204
Interventions	Treatment strategy: screening and treat all included participants Group 1: ivermectin 0.1 mg/kg (1 tablet) single dose (n = 102) Group 2: albendazole 6.7 mg/kg (2 tablets) single dose (n = 102)
Outcomes	Outcomes included:Ascaris prevalence pre‐ and post‐treatment, cure rates, pre‐ and post‐treatment AM epg, ERR, adverse events Outcomes not included in review: anthelmintic efficacy for Trichuris, hookworm, and Enterobius vermicularis
Notes	Diagnostic technique: Kato‐Katz Funding support: World Health Organization
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Quote: "individuals confirmed with intestinal nematode infections were chosen and stratified by age, sex, and intensity of the infection, and then were randomly assigned into treatment groups."
Allocation concealment (selection bias)	Unclear risk	Details not reported.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Treatment drugs had different appearance.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Details not reported.
Incomplete outcome data (attrition bias) All outcomes	Low risk	All participants included in analysis.
Selective reporting (reporting bias)	Low risk	All stated outcomes were reported.
Other bias	Low risk	No obvious source of other bias.