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Figure 1: Receiver operating characteristic curves to find the cut off value for stone size to predict postoperative complications and residual stones. (a) Area under the curve is 0.720 (0.661–0.779). The cut off for stone size was 30 mm with 57.1% sensitivity and 81.0% specificity to predict the postoperative complications. (b). Area under the curve is 0.767 (0.677–0.857). The cut off for stone size was 31 mm with 70.0% sensitivity and 81.5% specificity to predict the residual stones

Figure 1: Receiver operating characteristic curves to find the cut off value for stone size to predict postoperative complications and residual stones. (a) Area under the curve is 0.720 (0.661–0.779). The cut off for stone size was 30 mm with 57.1% sensitivity and 81.0% specificity to predict the postoperative complications. (b). Area under the curve is 0.767 (0.677–0.857). The cut off for stone size was 31 mm with 70.0% sensitivity and 81.5% specificity to predict the residual stones