Table 1.
Baseline demographic and clinical characteristics.
| Groups (n = 196) | FJI Group (n = 87) |
PRI Group (n = 109) |
p Value | |
|---|---|---|---|---|
| Gender | Men | 38% (33) | 44% (48) | 0.388 * |
| Woman | 62% (54) | 56% (61) | ||
| Age [yrs] | Mean ± SD | 66.2 ± 12.5 | 64.2 ± 11.6 | 0.248 † |
| Weight [kg] | Mean ± SD | 83.3 ± 16.7 | 83.5 ± 15.9 | 0.935 † |
| Height [m] | Mean ± SD | 1.7 ± 0.1 | 1.7 ± 0.1 | 0.254 † |
| BMI [kg/m2] | Mean ± SD | 28.8 ± 6.0 | 28.7 ± 5.1 | 0.883 † |
| Numeric rating scale (0–10) ‡ | Mean ± SD | 6.9 ± 1.2 | 7.1 ± 1.3 | 0.402 † |
| Oswestry Disability Index [%] (0–100) | Mean ± SD | 44.4 ± 13.2 | 47.3 ± 17.0 | 0.177 † |
| Grading of facet joint arthritis | Grade 3 | n.a. | ||
| (Fujiwara) | Grade 4 | |||
| Grading of nerve root compression | Moderate | 55% (48) | 56% (61) | n.a. |
| Severe | 45% (39) | 44% (48) |
* p-values from Fisher’s exact test; † p-values from Student’s t-test; ‡ numerical rating scale (NRS)overall including back and leg pain; SD—single standard deviation.