CALCA and juvenile polyposis syndrome: The pooled SN of PCT for PJI diagnosis was 0.441 [95% confidence interval (CI), 0.384–0.500] (Figure 4), the pooled SP was 0.852 (95% CI, 0.811–0.888) (Figure 5), the pooled PLR was 2.271 (95% CI, 1.808–2.853) (Figure 6), the pooled NLR was 0.713 (95% CI, 0.646–0.786) (Figure 7), and the pooled DOR was 5.756 (95% CI, 3.673–9.026) (Figure 8).