Similarly, a highly significant association was noted in all subgroups by study quality (low; RR = 0.29, 95%CI: 0.20–0.42, intermediate; RR = 0.69, 95%CI: 0.53–0.90, high; RR = 0.72, 95%CI: 0.64–0.81) (S8 Table, S4 Fig in S1 File ).
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Similarly, a highly significant association was noted in all subgroups by study quality (low; RR = 0.29, 95%CI: 0.20–0.42, intermediate; RR = 0.69, 95%CI: 0.53–0.90, high; RR = 0.72, 95%CI: 0.64–0.81) (S8 Table, S4 Fig in S1 File ).