TABLE 5.
Postoperative Outcome and Achievement of MCID
| Duration of preoperative leg pain | <3 mo | 3–<12 mo | 12–24 mo | >24 mo | P |
|---|---|---|---|---|---|
| EQ-5D Δ, SD (n) | 0.478±0.364 (146) | 0.389±0.394 (145) | 0.247±0.411 (143) | 0.286±0.398 (144) | 0.000 |
| Oswestry Index Δ, SD (n) | −30.1±20.1 (140) | −25.8±20.3 (137) | −17.2±21.7 (138) | −16.5±19.2 (143) | 0.000 |
| Leg pain VAS Δ, SD (n) | −45.1±32.3 (149) | −44.3±34.2 (148) | −33.7±34.0 (150) | −28.9±34.9 (150) | 0.000 |
| Back pain VAS Δ, SD (n) | −28.8±29.7 (149) | −22,4±32.7 (148) | −15.1±31.0 (150) | −17.6±30.8 (150) | 0.01 |
| % achieving MCID | |||||
| EQ-5D MCID, n (%) | 113 (77.4) | 101 (69.7) | 75 (52.4) | 80 (55.6) | 0.000 |
| Oswestry Index MCID, n (%) | 105 (75.0) | 96 (70.1) | 73 (52.9) | 71 (49.7) | 0.000 |
| Leg pain VAS MCID, n (%) | 118 (79.2) | 107 (72.3) | 98 (65.3) | 90 (60.0) | 0.002 |
| Back pain VAS MCID, n (%) | 98 (65.8) | 83 (56.1) | 61 (40.7) | 74 (49.3) | 0.000 |