Fig. 5

AWH, anterior wall height; PWH, posterior wall height; CA, Cobb angle. AWH and PWH were significantly increased on day 1 after surgery in both groups but were slightly lower at the follow-up assessment. Moreover, the PWH loss of correction in the PKCPP group was significantly less than that in the simple group at the last follow-up visit (P < 0.001). The CA was significantly decreased in both groups on day 1 after surgery, but there were no significant differences in the CA (P = 0.71). However, the postoperative CA loss at correction in the PKCPP group was significantly less than that in the simple group at the last follow-up visit (P < 0.05)