Table 1

Risk of bias assessment on social support interventions to improve DR-TB treatment outcomes

Study	Selection bias	Design	Confounders	Blinding	Data collection method	Withdrawals and dropouts	Global rating
Li et al11	Strong	Moderate	Strong	Moderate	Moderate	Strong	Moderate
Yin et al19	Moderate	Moderate	Strong	Moderate	Moderate	Moderate	Moderate
Luyirika et al38	Moderate	Weak	Weak	Weak	Moderate	Strong	Weak
Oyieng'o et al39	Moderate	Moderate	Weak	Moderate	Strong	Strong	Moderate
Taneja et al40	Strong	Moderate	Moderate	Moderate	Moderate	Strong	Moderate
Baral et al41	Moderate	Moderate	Strong	Moderate	Moderate	Strong	Moderate
Brust et al42	Strong	Moderate	Weak	Moderate	Moderate	Strong	Moderate
Acha et al43	Strong	Moderate	Weak	Moderate	Moderate	Strong	Moderate
Mohr et al44	Moderate	Moderate	Strong	Weak	Moderate	Strong	Moderate
Sripad et al45	Strong	Moderate	Moderate	Moderate	Moderate	Strong	Moderate
Bhatt et al46	Strong	Moderate	Strong	Moderate	Moderate	Strong	Moderate

DR-TB, drug-resistant tuberculosis.