borderline significancep = 0.02
The results indicated that: Preoperative-only rehabilitation reduced hospital stay by −2.94 days [95% CI (−5.50, −0.37)], with moderate heterogeneity ( I 2 = 84%) and borderline significance (Z = 2.24, p = 0.02); Postoperative-only rehabilitation demonstrated a significant benefit [MD = −1.39 days, 95% CI (−1.74, −1.03), p < 0.00001], with low heterogeneity ( I 2 = 40%); Comprehensive perioperative rehabilitation yielded the largest reduction [MD = −3.01 days, 95% CI (−4.42, −1.59), p < 0.0001], with high heterogeneity ( I 2 = 93%).