Table 4. Mapping models for patients with adolescent idiopathic scoliosis using main effects, squared terms of SRS-22r and patients' characteristics.
| Mapping Model (n = 227) | ||||||
|---|---|---|---|---|---|---|
| Main effects Model 1 |
Squared terms added Model 2 |
Clinical and demographic characteristics added Model 3 |
||||
| SRS-22r Domain | Coeff. | (95% C.I) | Coeff. | (95% C.I) | Coeff. | (95% C.I) |
| Constant | -0.094 | (-0.212,0.023) | -0.474 | (-1.158,0.210) | -0.366 | (-1.040,0.308) |
| Function / activity | 0.119 | (0.087,0.151) | 0.559 | (0.140,0.979) | 0.489 | (0.075,0.903) |
| Pain | 0.046 | (0.017,0.074) | -0.222 | (-0.449,0.005) | -0.221 | (-0.443,0.002) |
| Appearance | 0.020 | (0.001,0.040) | 0.020 | (0.001,0.039) | 0.023 | (0.005,0.042) |
| Mental Health | 0.037 | (0.015,0.059) | 0.035 | (0.013,0.057) | 0.037 | (0.016,0.058) |
| (Function / activity)2 | -0.050 | (-0.097,-0.002) | -0.042 | (-0.089,0.005) | ||
| Pain2 | 0.031 | (0.005,0.057) | 0.031 | (0.005,0.057) | ||
| Cobb angle | 0.001 | (0.001,0.002) | ||||
| Goodness-of-fit | ||||||
| R2 | 59.3% | 60.4% | 62.1% | |||
| Adj R2 | 58.6% | 59.3% | 60.9% | |||
| AIC | -536.647 | -538.734 | -546.650 | |||
| BIC | -519.567 | -514.822 | -519.321 | |||
| Predictive performance | ||||||
| RMSE | 0.073 | 0.072 | 0.071 | |||
| MAE | 0.053 | 0.052 | 0.052 | |||
| AE > 0.05 | 40.9% | 39.1% | 39.1% | |||
| AE > 0.10 | 18.7% | 16.4% | 15.1% | |||
Note: SRS-22r = Refined Scoliosis Research Society-22; AIC = Akaike information criteria; BIC = Bayesian information criteria; RMSE = root mean square error; MAE = mean absolute error; AE = absolute error; C.I. = Confidence Interval; Coeff. = Coefficient