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Table 2 Changes in EQ-5D and ODI over 2 years following lumbar spinal stenosis (LSS) surgery

From: Obese people benefit from lumbar spinal stenosis surgery as much as people of normal weight

  Before surgery P value* Change over 2 years P value*
  BMI   BMI  
  Normal
< 25
Overweight
25.0–29.9
Obese
≥30
  Normal
< 25
Overweight
25.0–29.9
Obese
≥30
 
Mean (±SD) Mean (±SD) Mean (±SD) Mean
(95% CI)
Mean
(95% CI)
Mean
(95% CI)
EQ-5D 0.49 (0.32) 0.48 (0.29) 0.43 (0.28) 0.41 0.23
(0.17 to 0.29)
0.22
(0.17 to 0.27)
0.22
(0.16 to 0.29)
0.92
ODI 28 (21) 30 (20) 36 (20) 0.001 − 17
(− 21 to − 14)
− 15
(− 18 to − 10)
− 14
(− 18 to − 10)
0.54
  1. *Adjusted for age and gender. P value represents change over 2 years in different BMI groups
  2. EQ-5D EuroQol-5D, ODI Oswestry Disability Index