Table 7.
CST factor model: Factor loadings of the sensor-based measures, corresponding domains and Cumulative Variance (CV) (Varimax Rotation).
| Domains | Dynamic Postural Impairment | Sit-to-Stand Jerkiness | ML Dynamic Postural Instability | Stand-to-Sit Jerkiness | AP Stand-to-Sit Weakness | AP Sit-to-Stand Weakness |
|---|---|---|---|---|---|---|
| Factors | CST1 | CST2 | CST3 | CST4 | CST5 | CST6 |
| Sts G RMS ML | −0.904 | −0.008 | −0.115 | −0.137 | −0.003 | −0.060 |
| Sts G Range ML | −0.846 | 0.031 | −0.16 | −0.045 | −0.032 | −0.292 |
| stS A RMS V | −0.836 | 0.118 | −0.195 | 0.259 | −0.103 | 0.101 |
| stS G RMS ML | −0.832 | −0.203 | −0.142 | −0.153 | −0.245 | −0.042 |
| Sts A Range V | −0.826 | 0.131 | −0.213 | 0.392 | 0.004 | 0.071 |
| Sts A RMS V | −0.809 | 0.128 | −0.176 | 0.393 | 0.086 | 0.148 |
| stS A Range V | −0.702 | 0.090 | −0.23 | 0.112 | −0.395 | −0.087 |
| stS G Range ML | −0.659 | −0.128 | −0.173 | −0.094 | −0.454 | −0.151 |
| Sts JS V | −0.207 | 0.909 | 0.084 | 0.208 | 0.118 | 0.084 |
| Sts JS AP | −0.054 | 0.909 | 0.071 | 0.238 | −0.102 | 0.133 |
| Sts JS ML | −0.047 | 0.897 | −0.032 | 0.205 | 0.15 | 0.127 |
| Duration Sts | 0.027 | 0.85 | 0.179 | 0.286 | 0.331 | 0.145 |
| SD Duration Sts | 0.154 | 0.718 | 0.024 | −0.109 | 0.026 | −0.081 |
| Total Duration | −0.039 | 0.706 | 0.173 | 0.529 | 0.277 | 0.243 |
| Sts A RMS ML | −0.055 | 0.019 | −0.938 | −0.048 | −0.131 | −0.161 |
| Sts A Range ML | −0.118 | 0.008 | −0.918 | 0.013 | −0.129 | −0.245 |
| Sts G RMS AP | −0.255 | −0.086 | −0.651 | −0.012 | −0.049 | −0.100 |
| stS A RMS ML | −0.126 | −0.140 | −0.644 | −0.111 | −0.402 | −0.049 |
| Sts G Range AP | −0.394 | −0.085 | −0.638 | 0.084 | −0.037 | −0.106 |
| stS A Range ML | −0.116 | −0.056 | −0.511 | −0.075 | −0.504 | −0.110 |
| stS JS AP | −0.162 | 0.226 | 0.043 | 0.905 | 0.098 | −0.122 |
| stS JS ML | −0.106 | 0.291 | −0.234 | 0.859 | 0.123 | 0.218 |
| stS JS V | −0.348 | 0.304 | 0.059 | 0.836 | 0.143 | 0.173 |
| Duration stS | −0.097 | 0.404 | 0.161 | 0.778 | 0.197 | 0.338 |
| SD Duration stS | 0.210 | −0.080 | 0.151 | 0.595 | −0.125 | 0.090 |
| stS A Range AP | −0.138 | −0.164 | −0.292 | −0.070 | −0.859 | −0.193 |
| stS A RMS AP | −0.208 | −0.304 | −0.295 | −0.136 | −0.764 | −0.284 |
| Sts A Range AP | −0.084 | −0.216 | −0.304 | −0.239 | −0.229 | −0.842 |
| Sts A RMS AP | −0.138 | −0.215 | −0.315 | −0.276 | −0.224 | −0.786 |
| stS G Range AP | −0.320 | −0.055 | −0.402 | −0.056 | −0.342 | 0.068 |
| stS G RMS AP | −0.221 | −0.134 | −0.449 | −0.110 | −0.317 | 0.105 |
| CV% | 19 | 35 | 50 | 64 | 73 | 80 |
| Relevant factor loadings (absolute value > 0.5) are bolded | ||||||
ACRONYMS: A: Accelerometer; AP: Antero-Posterior; CV: Cumulative Variance; G: Gyroscope; ML: Medio-Lateral; NJS: Normalized Jerk Score; RMS: Root Mean Square; SD: Standard Deviation; Sts: Sit to Stand; stS: Stand to Sit; V: Vertical.