Table 4.
Severity-specific algorithms for converting SF-36 data into AQoL scores
| Model | Predictor | β | SE | t | Sig. |
| SF-36 Subscale | |||||
| NIHSS = 0–5 | (Constant) | 0.0364 | 0.0423 | 0.86 | 0.390 |
| Physical Function (PF) | 0.0074 | 0.0014 | 5.24 | 0.000 | |
| Bodily Pain (BP) | 0.0006 | 0.0004 | 1.81 | 0.072 | |
| Social Function (SF) | 0.0022 | 0.0007 | 3.12 | 0.002 | |
| PF*PF | -5.25*10-5 | 1.22*10-5 | -4.29 | 0.000 | |
| PF*Mental Health (MH) | 2.90*10-5 | 1.36*10-5 | 2.13 | 0.034 | |
| Vitality (VI)*VI | -1.69*10-5 | 7.20*10-6 | -2.35 | 0.019 | |
| VI*Role Physical (RP) | 3.79*10-5 | 9.47*10-6 | 4.00 | 0.000 | |
| General Health (GH)*MH | 2.49*10-5 | 8.61*10-6 | 2.89 | 0.004 | |
| GH*RP | -3.07*10-5 | 7.89*10-6 | -3.89 | 0.000 | |
| SF*MH | -1.61*10-5 | 9.71*10-6 | -1.66 | 0.097 | |
 |
0.6346 | F566,364 = 2.14 | 0.000 | ||
| Obs = 941 | Ids = 567 | F10,364 = 22.34 | 0.000 | ||
| R2within = 0.38 | R2between = 0.69 | R2overall = 0.67 | |||
| NIHSS ≥ 6 | (Constant) | 0.0744 | 0.0781 | 0.95 | 0.343 |
| BP*SF | -2.23*10-5 | 7.60*10-6 | -2.93 | 0.004 | |
| PF | 0.0081 | 0.0023 | 3.52 | 0.001 | |
| RP | -0.0030 | 0.0013 | -2.29 | 0.024 | |
| MH*MH | -2.80*10-5 | 1.29*10-5 | -2.17 | 0.032 | |
| VI | -0.0053 | 0.0031 | -1.68 | 0.096 | |
| SF*PF | 7.89*10-5 | 2.41*10-5 | 3.27 | 0.002 | |
| PF*PF | -0.0001 | 1.49*10-5 | -8.38 | 0.000 | |
| PF*RP | -7.79*10-5 | 1.86*10-5 | -4.20 | 0.000 | |
| MH*RP | 6.49*10-5 | 2.82*10-5 | 2.30 | 0.000 | |
| SF*SF | 1.84*10-5 | 6.65*10-6 | 2.77 | 0.007 | |
| VI*MH | 8.90*10-5 | 4.27*10-5 | 2.09 | 0.040 | |
| GH*MH | 1.85*10-5 | 9.26*10-6 | 1.99 | 0.049 | |
|
- | - | - | ns | |
| Obs = 117 | Ids = 96 | F12,95 = 35.12 | 0.000 | ||
| R2overall = 0.50 | |||||
| SF-36 Item | |||||
| NIHSS = 0–5 | (Constant) | -0.2424 | 0.0757 | -3.20 | 0.001 |
| Item 2 (general health change) | -0.0408 | 0.0153 | -2.67 | 0.008 | |
| Item 3b (moderate activities) | 0.0584 | 0.0156 | 3.74 | 0.000 | |
| Item 3d (several flights stairs) | 0.0321 | 0.0154 | 2.09 | 0.038 | |
| Item 3h (walking 1/2 km) | 0.0384 | 0.0159 | 2.42 | 0.016 | |
| Item 3j (bathing/dressing) | 0.0934 | 0.0175 | 5.35 | 0.000 | |
| Item 4a (other activities) | 0.0590 | 0.0215 | 2.74 | 0.006 | |
| Item 4b (accomplished less) | -0.0386 | 0.0220 | -1.75 | 0.080 | |
| Item 9b (nervous) | 0.0195 | 0.0072 | 2.70 | 0.007 | |
| Item 9f (felt down) | 0.0159 | 0.0085 | 1.88 | 0.061 | |
| Item 9i (tired) | 0.0250 | 0.0069 | 3.60 | 0.000 | |
| Item 10 (social activities, time) | 0.0224 | 0.0068 | -3.20 | 0.001 | |
|
0.6378 | F567,363 = 2.05 | 0.000 | ||
| Obs = 942 | Ids = 568 | F11,363 = 20.68 | 0.000 | ||
| R2within = 0.39 | R2between = 0.69 | R2overall = 0.67 | |||
| NIHSS ≥ 6 | (Constant) | 0.0331 | 0.0427 | 0.77 | 0.441 |
| Item 3a (vigorous activities) | -0.1897 | 0.0497 | -3.82 | 0.000 | |
| Item 3b (moderate activities) | -0.2940 | 0.1393 | -2.11 | 0.037 | |
| Item 3d (several flights stairs) | 0.1462 | 0.0623 | 2.35 | 0.021 | |
| Item 3g (walking > 1 km) | 0.2080 | 0.0828 | 2.51 | 0.014 | |
| Item 3j (bathing/dressing) | 0.0901 | 0.0251 | 3.58 | 0.001 | |
| Item 6 (social activities, extent) | -0.0139 | 0.0082 | -1.69 | 0.094 | |
| Item 9c (down in dumps) | 0.0135 | 0.0068 | 1.99 | 0.050 | |
| Item 11c (expect worse health) | 0.0163 | 0.0066 | 2.46 | 0.016 | |
|
- | - | - | ns | |
| Obs = 117 | Ids = 96 | F8,95 = 15.44 | 0.000 | ||
| R2overall = 0.37 | |||||