Fig. 5
P pooled analysis of ISR between IPFP resection and IPFP preservation. Legend: Three studies reported the ISR; we found some statistical heterogeneity between the two groups of ISR (x2 = 30.33; df = 2, P < 0.00001; I2 = 93%); thus, a random-effects model was used. The pooled results showed that patients in both groups experienced similar ISR (MD = − 0.03, 95% CI [− 0.12, 0.08], P = 0.87)