Chompook 2006 THA.

Methods	Case‐control study (matched)
Participants	Cases: attended health facility with diarrhoea and shigella isolated from rectal swab, n = 139 (after 53 not enrolled: not resident, not found, moved away, died, or time‐constraints), median age 5 years, 57% girls. Controls: individuals free from diarrhoea or dysentery during the 4 weeks prior to recruitment, matched for sex and age with the cases (within 3 months for children aged < 2 years; within 6 months for children aged < 5 years; within 12 months for children aged < 16 years old; and within 5 years for people aged ≥ 16 years), randomly selected from the population list of the HC where the case resided. n = 264 (after 7 moved and 2 refused), median age 5 years, 58% girls.
Interventions	Risk factors of interest: children not/sometimes using latrine vs always using latrine; child excreta disposal method (no data presented).
Outcomes	Diarrhoea (≥ 3 loose stools, or ≥ 1 watery, bloody, or mucoid stool in the 24 hours prior to visiting the health facility) with isolated Shigella
Notes	Location: semi‐urban, Kaengkhoi District, Saraburi Province, Thailand Length of recruitment: 2 years surveillance for Shigella (2000–2002) Publication status: journal and PhD thesis
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	NA
Allocation concealment (selection bias)	Unclear risk	NA
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	NA
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	NA
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	NA
Selective reporting (reporting bias)	Unclear risk	NA
Other bias	Unclear risk	NA
Similarity of baseline outcome measurements	Unclear risk	NA
Similarity of baseline characteristics	Unclear risk	NA
Adequate allocation of intervention concealment during the study	Unclear risk	NA
Adequate protection against contamination	Unclear risk	NA
Confounders adequately adjusted for in analysis/design	Unclear risk	NA
Recruitment bias	Unclear risk	NA
Baseline imbalance	Unclear risk	NA
Loss of clusters	Unclear risk	NA
Incorrect analysis	Unclear risk	NA