Association of G6PD status and haemolytic anaemia in patients receiving anti-malarial agents: a systematic review and meta-analysis

Table 4 Risk of bias of non-randomized studies for intervention with ROBINS-I

Study	Confounding	Selection of participants	Classification of interventions	Deviations from intended interventions	Missing data	Measurement of outcomes	Selection of reported result	Overall
Khoo et al. [26]	+ + +	+	+ + +	+ +	~	+ +	+ +	Serious risk
Kheng et al. [27]	+ +	+	+	+ +	+	+	+	Moderate risk

+ : low risk, + + : moderate risk, + + + : serious risk, + + + + : critical risk, ~ : no information
ROBINS I Risk of Bias in Non-Randomized Studies-of Interventions

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