Table 3.
Patient satisfaction (global assessment) at 1-year follow-up in relation to pre-and postoperative HRLQoL, functional status, and pain
| EuroQol-5D (SD) |
Oswestry disability index (SD) |
Leg pain VAS (SD) |
Back pain VAS (SD) |
Estimated walking distance (SD) |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PO | FU | p-value | PO | FU | p-value | PO | FU | p-value | PO | FU | p-value | PO | FU | p-value | |
| Satisfied | 0.44 | 0.66 | < 0.001 | 45 | 22 | < 0.001 | 68 | 26 | < 0.001 | 54 | 24 | < 0.001 | 1.8 | 2.8 | < 0.001 |
| n 67 (65%) | (0.30) | (0.24) | (15) | (14) | (24) | (28) | (28) | (24) | (0.8) | (1.1) | |||||
| n = | 49 | 58 | 36 | 40 | 51 | 61 | 50 | 62 | 65 | 67 | |||||
| Undecided | |||||||||||||||
| n 25 (24%) | 0.33 | 0.49 | 0.007 | 50 | 43 | 0.2 | 70 | 58 | 0.08 | 57 | 53 | 0.6 | 1.5 | 2.0 | 0.005 |
| (0.28) | (0.25) | (17) | (21) | (21) | (30) | (28) | (30) | (0.8) | (1.1) | ||||||
| n = | 20 | 21 | 14 | 17 | 21 | 23 | 22 | 24 | 24 | 25 | |||||
| Dissatisfied | |||||||||||||||
| n 11 (11%) | 0.52 | 0.43 | 0.3 | 40 | 50 | 0.1 | 52 | 55 | 0.9 | 53 | 64 | 0.1 | 1.5 | 1.5 | 1.0 |
| (0.25) | (0.27) | (11) | (21) | (26) | (32) | (25) | (25) | (0.5) | (0.9) | ||||||
| n = | 7 | 7 | 7 | 6 | 8 | 11 | 8 | 11 | 10 | 11 | |||||
| pa | 0.2 | < 0.001 | 0.5 | < 0.001 | 0.2 | < 0.001 | 0.9 | < 0.001 | 0.2 | < 0.001 | |||||
| p b | 0.75 | < 0.001 | 0.45 | < 0.001 | 0.15 | < 0.001 | 0.93 | < 0.001 | 0.10 | < 0.001 | |||||
PO: preoperative; FU: 1-year follow-up; ODI: ; VAS: visual analog scale; SD: standard deviation.
pa: Kruskall Wallis equality of populations rank test; p b: test for trend across ordered groups.
Paired t-test was used to compare outcome measures within global assessment for change in Oswestry disability index, leg and back pain, and estimated walking distance. Wilcoxon matched-pairs signed rank test was used for change in EQ-5D, as this variable did not have a normal distribution according to the Shapiro-Wilk test.