Obese class I BMI 30.0–34.9 | Obese class II BMI 35.0–39.9 | Obese class III BMI ≥ 40.0 | Group comparison improvement | |||||||
---|---|---|---|---|---|---|---|---|---|---|
n1 = 1329 | n1 = 304 | n1 = 57 | ||||||||
n2 = 1328 | n2 = 307 | n2 = 57 | ||||||||
n3 = 1332 | n3 = 305 | n3 = 57 | ||||||||
Pre-operative | Post-operative | Improvement* | Pre-operative | Post-operative | Improvement* | Pre-operative | Post-operative | Improvement* | p-value | |
NRS leg pain (n = 1690)1 | 6.7 ± 2.4 | 2.3 ± 2.8 | 4.4 (4.3, 4.6) | 7.0 ± 2.5 | 3.1 ± 3.2 | 3.8 (3.5, 4.1) | 6.8 ± 2.2 | 2.1 ± 2.7 | 4.6 (3.9, 5.3) | < 0.001 |
NRS back pain (n = 1692)2 | 5.0 ± 2.9 | 2.8 ± 2.8 | 2.3 (2.1, 2.4) | 5.6 ± 3.0 | 3.2 ± 2.9 | 2.2 (1.9, 2.5) | 5.4 ± 2.7 | 2.8 ± 2.8 | 2.6 (1.9, 3.3) | 0.50 |
ODI (n = 1694)3 | 50 ± 17 | 22 ± 19 | 29 (28, 29) | 53 ± 19 | 27 ± 20 | 25 (22, 27) | 51 ± 17 | 25 ± 21 | 27 (22, 32) | < 0.01 |