Table 2.
SF-36 results: ANOVA to describe changes over time for regular scoring (0–100) and norm-based scaling, each
| (1) Preoperative M (SD) |
(2) 6 months M (SD) |
(3) 12 months M (SD) |
(4) 18 months M (SD) |
F | Df | p | η2 | |
|---|---|---|---|---|---|---|---|---|
| PF (Physical Functioning) | ||||||||
| NBS RS |
27.4 (±16.9) 52.4 (±25.9) |
35.9 (±17.1) 66.8 (±25.0) |
42.4 (±14.6) 76.7 (±22.7) |
44.7 (±13.9) 80.5 (±21.3) |
37.452 | 3 | <0.001** | 0.327 |
| RP (Role Physical) | ||||||||
| NBS RS |
33.0 (±15.3) 38.0 (±43.2) |
41.6 (±14.5) 61.7 (±43.1) |
44.9 (±14.2) 72.1 (±40.1) |
46.3 (±13.9) 75.3 (±41.0) |
22.109 | 2.571 | <0.001** | 0.223 |
| BP (Bodily Pain) | ||||||||
| NBS RS |
34.5 (±8.2) 38.4 (±21.1) |
41.0 (±9.4) 58.1 (±24.5) |
45.6 (±9.3) 67.9 (±24.8) |
46.5 (±10.5) 70.0 (±28.4) |
46.748 | 2.843 | <0.001** | 0.378 |
| GH (General Health) | ||||||||
| NBS RS |
46.6 (±10.9) 60.8 (±20.2) |
50.6 (±10.2) 68.3 (±19.8) |
51.7 (±10.6) 70.8 (±19.3) |
50.8 (±11.9) 68.8 (±22.8) |
10.469 | 2.906 | <0.001** | 0.121 |
| VT (Vitality) | ||||||||
| NBS RS |
43.0 (±11.7) 52.7 (±19.7) |
47.1 (±11.3) 59.6 (±18.9) |
48.9 (±11.3) 62.6 (±18.8) |
49.1 (±12.0) 63.0 (±20.5) |
10.093 | 2.764 | <0.001** | 0.117 |
| SF (Social Functioning) | ||||||||
| NBS RS |
41.6 (±13.1) 74.8 (±22.8) |
45.6 (±12.8) 81.8 (±21.7) |
46.4 (±13.4) 83.2 (±23.4) |
46.9 (±12.2) 83.9 (±21.7) |
6.093 | 2.865 | 0.001** | 0.074 |
| RE (Role Emotional) | ||||||||
| NBS RS |
38.8 (±19.1) 64.2 (±46.4) |
43.8 (±16.0) 75.9 (±39.9) |
46.3 (±14.5) 82.2 (±35.7) |
47.6 (±13.9) 85.4 (±34.1) |
10.612 | 2.178 | <0.001** | 0.121 |
| MH (Mental Health) | ||||||||
| NBS RS |
46.4 (±12.8) 68.6 (±20.1) |
48.3 (±12.0) 71.7 (±18.6) |
50.5 (±11.2) 75.1 (±17.7) |
50.4 (±11.9) 75.1 (±18.7) |
6.002 | 2.812 | .001** | 0.073 |
| PCS (Physical Component Summary Score) | ||||||||
| NBS RS |
30.2 (±13.4) – |
39.5 (±13.5) – |
44.5 (±12.9) – |
45.9 (±13.5) – |
40.993 | 2.368 | <0.001** | 0.350 |
| MCS (Mental Component Summary Score | ||||||||
| NBS RS |
46.0 (±14.9) – |
48.5 (±13.7) – |
49.3 (±12.6) – |
49.5 (±12.4) – |
3.761 | 2.543 | 0.017* | 0.047 |
NBS Norm-Based Scaling, RS Regular Scoring; Df corrected according to Levene-Test of Significance, if necessary