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Table 2 Paired t test on BMI and KOOS pre- and post-op

From: Bariatric surgery improves knee function and not knee pain in the early postoperative period

  Pre-op (mean, SD) Post-op (mean, SD) p value (95% CI)
BMI 42.8 (5.7) 34.4 (5.3) < 0.01
KOOS (total score) 66.0 (19.9) 89.3 (8.91) < 0.01
Knee stiffness 50.2 (18.4) 52.0 (19.1) 0.694
Knee pain 70.3 (24.38) 79.9 (25.9) 0.147
Daily function 67.2 (26.51) 78.5 (28.9) 0.167
Sports function 54.3 (23.41) 77.0 (20.2) < 0.01
QOL related to knee 60.2 (27.68) 80.3 (21.9) 0.004
  1. Pre-op preoperative, Post-op postoperative, BMI body mass index, KOOS knee osteoarthritis outcomes score, QOL quality of life