Table 2 Change in early postoperative physical activity and function from 6 weeks to 3 and 6 months after lumbar spine surgery
Outcome Variable | 6 weeks Mean (95% CI) | 3 months Mean (95% CI) | 6 months Mean (95% CI) | p-value* |
|---|---|---|---|---|
Physical activity | ||||
 Wear time (hours/day) | 15.2 (14.6; 15.7) | 15.0 (14.5; 15.6) | 15.2 (14.6; 15.7) | 0.81 |
 Steps/day | 3310 (2776; 3844) | 3705 (3292; 4119) | 3781 (3289; 4273) | 0.07 |
 Time in MVPA (minutes/week) | 0 | 0 | 0 | – |
Physical function | ||||
 ODI | 34.7 (30.0; 39.4) | 26.1 (21.3; 30.9) | 21.6 (16.7; 26.4) | <  0.05 |
 SF-12 Physical Health | 30.5 (27.6; 33.4) | 38.0 (35.0; 40.9) | 42.4 (39.4; 45.4) | <  0.05 |
 TUG (s) | 11.2 (10.0; 12.4) | 10.4 (9.6; 11.3) | 9.8 (9.0; 10.7) | <  0.05 |
 10 MW (m/s) | 1.04 (0.96; 1.12) | 1.12 (1.05; 1.19) | 1.19 (1.10; 1.27) | <  0.05 |