Table 2 Baseline characteristics of participants
Factor | Total (n = 149) | Stand-alone expandable cage fusion (n = 69) | Screw-assisted fusion (n = 80) | P value |
|---|---|---|---|---|
Age (years), mean (SD) | 63.25 (8.37) | 61.78 (8.05) | 64.51 (8.50) | .15a |
Sex (%) | .36b | |||
Male | 38 (25.5) | M: 19 (27.54) | M: 19 (23.75) | |
Female | 111 (74.5) | F: 50 (72.46) | F: 61 (76.25) | |
Symptom duration (months), mean (SD) | 9.52 (10.40) | 10.86 (12.74) | 8.36 (7.75) | .14a |
Follow-up duration (months), mean (SD) | 72.91 (17.53) | 75.23 (14.23) | 70.91 (11.62) | .10a |
ASA-PS grade, %, mean (SD) | .82b | |||
1 | 13 (8.72) | 4 (10.14) | 6 (75) | |
2 | 144 (87.92) | 67 (86.96) | 77 (88.75) | |
3 | 5 (3.36) | 69 (2.9) | 1 (3.75) | |
No. of involved levels, %, mean (SD) | .45b | |||
2 | 141 (94.63) | 66 (95.65) | 75 (93.75) | |
3 | 8 (5.37) | 3 (4.35) | 5 (6.25) | |
Operative time/level, min, mean (SD) | 70.80 (17.01) | 58.48 (11.10) | 81.43 (13.75) | .00028a* |
Hospital stay, days, mean (SD) | 11.96 (2.85) | 14.10 (1.97) | 10.12 (2.10) | .00001a* |