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(A) Pooled estimates of positive predictive value of the M-CHAT-R/F questionnaire – all studies. (B) Pooled estimates of negative predictive value of the M-CHAT-R/F questionnaire. Studies are listed based on quality from “good” to “poor.” *, Denotes studies related as “poor” quality. +, Denotes studies that assessed a random sample of screen-negative children.
