Table 6.
Variance component estimates and ICCs for median CNR, PSC and Beta values
| Variance component estimates | Intraclass correlation coefficients | ||||||
|---|---|---|---|---|---|---|---|
| Subject | Site | Visit | Site*subject | Unexplained | ICC‐between‐site | ICC within‐site | |
| CNR Motor | 0.037 | 0.696 | 0.009 | 0.162 | 0.101 | 0.04 | 0.89 |
| CNR Sensory | 0.036 | 0.005 | 0.000 | 0.023 | 0.52 | 0.06 | 0.11 |
| PSC Motor | 0.091 | 0.280 | 0.000 | 0.145 | 0.098 | 0.15 | 0.84 |
| PSC Sensory | 0.031 | 0.063 | 0.002 | 0.059 | 0.026 | 0.17 | 0.85 |
| Beta Motor | 0.373 | 4.846 | 0.000 | 1.252 | 0.551 | 0.05 | 0.92 |
| Beta Sensory | 0.039 | 0.626 | 0.002 | 0.314 | 0.086 | 0.04 | 0.92 |
For ICC computations variance component estimates were calculated for the median CNR and PSC values as well as median beta regressors of each measurement. Values in the table show the respective estimates for each of the factors that were used to calculate between‐site and within‐site ICCs (see methods section for details). The obtained ICC values range from 0 to 1 with higher values signifying better reproducibility (agreement) and accordingly lower variability.