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Difference in the greyscale values of distinct lesions. The positive rates of the greyscale in distinct cervical tissues were significantly different (p < 0.05). Further two‐by‐two comparison showed that the positive rate in the CA group was higher than that in the cervicitis, LSIL, and HSIL, the HSIL group higher than the cervicitis group, and the LSIL group higher than the cervicitis group (p < 0.05).
