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Table 5 Pre- and one-year postoperative data and improvement from before to one year after surgery in Numeric Rating Scale (NRS) leg pain, NRS back pain, and Oswestry Disability Index (ODI) in obese patients with lumbar disc herniation (LDH) surgery in relation to body mass index (BMI; g/cm2) class. Number of patients included for each variable are presented as n1 to n3. Data are presented as means ± standard deviations and as mean differences, adjusted for age, smoking habits, sex, and baseline value for the evaluated variable, with 95% confidence intervals within brackets. Statistically significant differences are bolded

From: A study comparing outcomes between obese and nonobese patients with lumbar disc herniation undergoing surgery: a study of the Swedish National Quality Registry of 9979 patients

 

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

  1. *adjusted for age, smoking habits, sex, and baseline value for the evaluated variable