Table 4 Responder analysis (patients achieving MCID)
| Â | Before matching | After matching | ||||
|---|---|---|---|---|---|---|
Patients achieving MCID at 1 year (%) | Difference between groups | Patients achieving MCID at 1 year (%) | Difference between groups | |||
|  | Physical therapy (n = 38) (95% CI) | Surgery (n = 186) (95% CI) | Physical therapy minus Surgery (95% CI) | Physical therapy (n = 33) (95% CI) | Surgery (n = 33) (95% CI) | Physical therapy minus Surgery (95% CI) |
Zurich claudication questionnaire | ||||||
 Symptom severity | 57.9 | 66.1 | −8.2 (− 25.2 to 8.3) | 57.6 | 63.6 | −6.1 (− 28.6 to 17.2) |
 Physical function | 42.1 | 67.2 | −25.1 (− 41.3 to −7.8)* | 42.4 | 60.6 | −18.2 (− 40.2 to 5.9) |
 Satisfaction | 94.7 | 76.9 | 17.9 (5.7 to 26.1)* | 93.9 | 78.8 | 15.2 (−2.4 to 31.0) |
Numerical rating scale | ||||||
 Back pain | 29.0 | 52.7 | −23.7 (−38.6 to −6.8)* | 30.3 | 45.5 | −15.1 (− 36.8 to 8.3) |
 Leg pain | 52.6 | 58.1 | −5.4 (−22.5 to 11.5) | 51.5 | 54.6 | −3.0 (−26.2 to 20.5) |
 Leg numbness | 39.5 | 50.5 | −11.1 (−27.3 to 6.2) | 39.4 | 45.5 | −6.0 (−28.9 to 17.4) |
Japanese orthopedic association back pain evaluation questionnaire | ||||||
 Pain-related disorders | 47.1 | 70.2 | −23.2 (−40.5 to −5.8)* | 44.8 | 69.0 | −24.1 (−46.6 to 1.5) |
 Lumbar dysfunction | 44.1 | 46.9 | −2.7 (− 20.3 to 15.3) | 44.8 | 25.8 | 19.0 (−5.3 to 41.1) |
 Gait disturbance | 45.7 | 68.9 | −23.2 (−40.1 to −5.3)* | 45.2 | 53.1 | −8.0 (−31.3 to 16.4) |
 Social life dysfunction | 34.2 | 49.7 | −15.5 (− 31.1 to 1.7) | 36.4 | 39.4 | −2.6 (− 25.7 to 20.0) |
 Psychological disorders | 13.2 | 32.8 | −19.6 (−30.9 to −5.0)* | 12.1 | 21.2 | −9.1 (−26.7 to 9.5) |
SF-36 | ||||||
 Physical functioning | 29.0 | 58.6 | −29.7 (−44.4 to −12.7)* | 33.3 | 42.4 | −9.1 (−31.2 to 14.1) |
 Bodily pain | 55.3 | 69.9 | −14.6 (−31.4 to 2.1) | 51.5 | 60.6 | −9.1 (−31.8 to 14.6) |
 Role physical | 36.8 | 56.5 | −19.6 (−35.5 to −2.3)* | 34.4 | 48.4 | −14.0 (−36.6 to 10.2) |
 Role emotional | 23.7 | 49.5 | −25.8 (−39.7 to −9.3)* | 19.4 | 44.8 | −25.5 (−46.3 to −1.6)* |
 Mental health | 31.6 | 41.4 | −9.8 (−25.1 to 7.1) | 33.3 | 36.4 | −3.0 (−25.3 to 19.6) |
 Social functioning | 23.7 | 45.7 | −22.0 (−35.9 to −5.6)* | 29.6 | 33.3 | −3.7 (− 26.9 to 20.2) |
 Vitality | 34.2 | 44.1 | −9.9 (−25.5 to 7.2) | 36.4 | 30.3 | 6.1 (−16.5 to 27.9) |
 General health | 23.7 | 34.4 | −10.7 (−24.6 to 5.5) | 21.2 | 21.2 | 0 (−19.7 to 19.7) |