Variable | Completed 6-month follow-up of physical capacity tasks (n = 93) | Drop-outs (n = 25) | Completed 6-month follow-up of physical capacity tasks AND construct-specific GPE scales (n = 57) |
---|---|---|---|
Age, mean (SD) | 46.5 (8.0) | 43.0 (9.2) | 47.2 (8.4) |
Gender, n (%) | |||
 Men | 42 (45.2) | 13 (52.0) | 26 (45.6) |
 Women | 51 (54.8) | 12 (48.0) | 31 (54.4) |
Education level, n (%) | |||
 Elementary school | 6 (6.5) | 1 (4.0) | 5 (8.8) |
 High school | 38 (40.1) | 13 (52.0) | 22 (38.6) |
 University or college | 36 (38.7) | 6 (24.0) | 21 (36.8) |
 Vocational education | 12 (12.9) | 5 (20.0) | 9 (15.8) |
 Missing information | 1 (1.1) | 0 (0.0) | 0 (0.0) |
BMI, mean (SD) | 26.2 (3.6) | 26.9 (4.0) | 26.1 (3.7) |
Back pain duration, n (%) | |||
 3–12 months | 8 (8.6) | 1 (4.0) | 3 (5.3) |
 > 1 year to ≤2 years | 17 (18.3) | 3 (12.0) | 11 (19.3) |
 > 2 years | 66 (71.0) | 21 (84.0) | 41 (71.9) |
 Missing information | 2 (2.1) | 0 (0.0) | 1 (1.8) |
Previous back surgery, n (%) | |||
 0 occasions | 83 (89.2) | 24 (96.0) | 55 (96.4) |
 1 occasion | 7 (7.5) | 0 (0.0) | 1 (1.8) |
 2 occasions | 2 (2.2) | 1 (4.0) | 1 (1.8) |
 Missing information | 1 (1.1) | 0 (0.0) | 0 (0.0) |
Current surgical procedure, n (%) | |||
 Instrumented posterior fusion | 88 (94.6) | 14 (56.0) | 55 (96.5) |
 Instrumented anterior interbody fusion | 1 (1.1) | 0 (0.0) | 0 (0.0) |
 Instrumented combined posterior and interbody fusion | 4 (4.3) | 1 (4.0) | 2 (3.5) |
 Did not go through fusion surgery | 0 (0.0) | 10 (40.0) | 0 (0.0) |
Number of fusion levels, n (%) | |||
 One level | 55 (59.1) | 9 (36.0) | 34 (59.7) |
 Two levels | 33 (35.5) | 6 (24.0) | 21 (36.8) |
 Three levels | 5 (5.4) | 0 (0.0) | 2 (3.5) |
 Did not go through fusion surgery | 0 (0.0) | 10 (40.0) | 0 (0.0) |
Work status, n (%) | |||
 Working | 54 (58.1) | 19 (76.0) | 33 (57.8) |
 Part-time sick leave | 15 (16.1) | 0 (0.0) | 9 (15.8) |
 Fulltime sick leave | 17 (18.3) | 5 (20.0) | 12 (21.1) |
 Unemployed | 4 (4.3) | 1 (4.0) | 2 (3.5) |
 Missing information | 3 (3.2) | 0 (0.0) | 1 (1.8) |
Comorbidity, n (%) | |||
 Neurological disorder | 0 (0.0) | 0 (0.0) | 0 (0.0) |
 Heart disease | 0 (0.0) | 0 (0.0) | 0 (0.0) |
 Other disease that affects walking ability | 2 (2.2) | 4 (16.0) | 2 (3.5) |
 Other disease that causes pain | 4 (4.4) | 2 (8.0) | 1 (1.8) |
5-min walk, mean (SD) | 422.3 (82.4) | 402.2 (82.4) | 419.7 (87.6) |
1-min stair climbing, mean (SD) | 105.3 (24.8) | 99.4 (23.4) | 104.9 (26.7) |
50-ft walk, mean (SD) | 9.2 (2.8) | 9.4 (2.6) | 9.4 (3.3) |
Timed up-and-go, mean (SD) | 7.8 (3.0) | 8.2 (2.6) | 8.2 (3.6) |
Disability, ODI, mean (SD) | 35.8 (11.5) | 40.7 (14.8) | 34.6 (12.7) |
Back pain intensity, VAS, mean (SD) | 60.0 (19.9) | 65.1 (17.1) | 56.7 (20.5) |
Leg pain intensity, VAS, median (IQR) | 29.8 (3.4–55.0) | 59.5 (7.0–71.4) | 29.2 (3.7–59.8) |
Depression, HADS, mean (SD) | 5.0 (3.5) | 6.9 (3.6) | 4.6 (3.5) |
Kinesiophobia, TSK, mean (SD) | 37.3 (8.6) | 41.6 (7.1) | 37.5 (9.0) |
Pain catastrophizing, PCS, mean (SD) | 21.8 (7.9) | 26.4 (7.9) | 22.5 (7.5) |