Table 1.
Comparison of clinical outcomes between satisfied and dissatisfied subgroups at short-term follow-up by univariate analysis
| Variable | All patients (n=226) | Functional improvement (n = 226) |
Relief of back pain |
Relief of leg pain |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Satisfied (n=158) | Dissatisfied (n=68) | p-value | Satisfied (n=202) | Dissatisfied (n=24) | p-value | Satisfied (n=199) | Dissatisfied (n=27) | p-value | |||
| ODI score | |||||||||||
| Baseline | 45.3 ± 20.1 | 49.6 ± 21.0 | 35.6 ± 13.6 | < 0.001** | 45.6 ± 20.1 | 43.4 ± 20.5 | 0.615 | 46.1 ± 20.0 | 40.1 ± 20.6 | 0.148 | |
| At 3 months | 12.3 ± 12.6 | 7.1 ± 6.7 | 24.2 ± 14.8 | < 0.001** | 10.3 ± 10.4 | 28.7 ± 17.1 | < 0.001** | 9.8 ± 9.6 | 30.6 ± 16.1 | < 0.001** | |
| SF-36 PF score | |||||||||||
| Baseline | 51.7 ± 23.8 | 47.8 ± 24.8 | 60.7 ± 18.5 | < 0.001** | 51.7 ± 23.6 | 51.5 ± 26.3 | 0.967 | 50.6 ± 23.4 | 59.3 ± 25.5 | 0.077* | |
| At 3 months | 90.3 ± 12.6 | 93.8 ± 6.4 | 82.1 ± 18.3 | < 0.001** | 92.2 ± 7.7 | 73.8 ± 26.5 | 0.002** | 92.7 ± 6.7 | 72.6 ± 25.7 | < 0.001** | |
| SF-36 BP score | |||||||||||
| Baseline | 46.5 ± 19.3 | 43.9 ± 20.3 | 52.5 ± 15.3 | 0.002** | 46.0 ± 19.6 | 50.5 ± 16.5 | 0.286 | 45.6 ± 19.5 | 53.1 ± 16.7 | 0.058* | |
| At 3 months | 87.1 ± 14.0 | 91.9 ± 8.7 | 75.9 ± 17.4 | < 0.001** | 89.8 ± 10.3 | 63.8 ± 19.0 | < 0.001** | 90.2 ± 9.2 | 64.2 ± 20.8 | < 0.001** | |
| EQ-5D score | |||||||||||
| Baseline | 0.52 ± 0.23 | 0.48 ± 0.25 | 0.62 ± 0.14 | < 0.001** | 0.52 ± 0.24 | 0.56 ± 0.15 | 0.365 | 0.51 ± 0.23 | 0.58 ± 0.19 | 0.137 | |
| At 3 months | 0.90 ± 0.13 | 0.94 ± 0.09 | 0.82 ± 0.18 | < 0.001** | 0.93 ± 0.10 | 0.72 ± 0.22 | < 0.001** | 0.93 ± 0.09 | 0.71 ± 0.22 | < 0.001** | |
| VAS-back score | |||||||||||
| Baseline | 3.96 ± 2.47 | 3.99 ± 2.55 | 3.90 ± 2.31 | 0.815 | 3.80 ± 2.51 | 5.30 ± 1.60 | < 0.001** | 3.85 ± 2.49 | 4.82 ± 2.24 | 0.056* | |
| At 3 months | 0.95 ± 1.29 | 0.66 ± 0.92 | 1.63 ± 1.71 | < 0.001** | 0.60 ± 0.70 | 3.96 ± 1.20 | < 0.001** | 0.68 ± 0.84 | 2.96 ± 2.07 | < 0.001** | |
| VAS-leg score | |||||||||||
| Baseline | 5.43 ± 2.00 | 5.67 ± 2.03 | 4.86 ± 1.81 | 0.005** | 5.42 ± 2.00 | 5.50 ± 2.04 | 0.856 | 5.46 ± 2.04 | 5.19 ± 1.69 | 0.500 | |
| At 3 months | 0.96 ± 1.43 | 0.51 ± 0.83 | 2.02 ± 1.91 | < 0.001** | 0.68 ± 1.04 | 3.29 ± 2.07 | < 0.001** | 0.52 ± 0.70 | 4.19 ± 1.33 | < 0.001** | |
Values are presented as mean±standard deviation.
ODI, Oswestry Disability Index; SF-36 PF; 36-item Short Form Health Survey physical function; SF-36 BP, 36-item Short Form Health Survey bodily pain; EQ-5D, European quality of life-5 dimensions; VAS, visual analogue scale.
*
p<0.1.
**
p<0.05.