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Cumulative meta-analysis (forest plots) of the TAUS accuracy and sensitivity between the advanced group and early group. (A) Difference in accuracy between the advanced and early groups. (B) Difference in sensitivity between the advanced and early groups. (C) SROC of 4 studies about TAUS specificity and sensitivity in discriminating advanced and early groups. SROC = summary receiver operating characteristics, TAUS = transabdominal ultrasound.
