| LBP cross-sectional | LBP longitudinal | NP cross-sectional | NP longitudinal |
---|---|---|---|---|
Patients: n | 548 | 211 | 191 | 71 |
Underweight (BMI < 18 kg/m2): n (%) | 11 (2)a | 5 (2)a | 6 (3)a | 4 (6)a |
Lean (BMI 18- < 25 kg/m2): n (%) | 198 (36) | 83 (39) | 94 (49) | 33 (46) |
Overweight (BMI 25- <30Â kg/m2): n (%) | 194 (35) | 79 (37) | 61 (32) | 24 (34)a |
Obesity class I (BMI 30- < 35 kg/m2): n (%) | 94 (18) | 31 (15)a | 22 (12)a | 7 (10)a |
Obesity class II–III (BMI ≥ 35 kg/m2): n (%) | 51 (9) | 13 (6)a | 8 (4)a | 3 (4)a |