Baseline characteristics for patients that underwent lumbar spinal surgery between 2007 and 2010 that required subsequent additional operations
| DDD | LSS with DS fusion, all ages | LSS with DS fusion, age <60 years | LSS with DS decompression | LSS without DS decompression | |
| n | 40 | 157 | 33 | 81 | 557 |
| Age (years), mean (SD) | 45.7 (9.89) | 62.9 (8.88) | 50.9 (5.14) | 67.6 (9.37) | 64.1 (10.7) |
| BMI (kg/m2), mean (SD) | 26.4 (3.15) | 27.2 (4.27) | 26.9 (3.83) | 26.7 (4.37) | 27.9 (3.92) |
| Women, n (%) | 12 (30) | 109 (69.4) | 22 (66.7) | 50 (61.7) | 234 (42) |
| Follow-up time (years), mean (SD) | 12 (1.0) | 11.6 (1.0) | 11.6 (1.0) | 12.1 (1.0) | 12 (1.1) |
For LSS with DS, data for all patients as well as data for the subgroup of patients younger than 60 years are presented.
BMI, body mass index; DDD, degenerative disk disease; DS, degenerative spondylolisthesis; LSS, lumbar spinal stenosis.