Table 1 The means and standard deviations for ECD measurements obtained using the SP-2000P and z-ring CS4, intra-observer repeatability, inter-observer reproducibility (z-ring CS4 only), and comparison between SP-2000P vs. z-ring CS4 (mean differences, limits of agreement, paired t -test, un-paired test, and p-values)
Analysis of ECD values | Observer 1 | Observer 2 | |
|---|---|---|---|
SP-2000P | z-ring CS4 | z-ring CS4 | |
Mean ± SD* | 3115.50 ± 279.70 | 3167.50 ± 264.75 | 3192.63 ± 249.42 |
Intra-observer repeatability (p-value) | 0.22 | 0.99 | 0.13 |
Mean difference ± SD* | Limits of agreement | p-value | |
Inter-observer reproducibility with z-ring CS4** | 25.10 ± 128.92 | +304, -354.20 | 0.30 |
Comparison between SP-2000P vs. z-ring CS4† | -52.10 ± 97.90 | +139.80, -243.90 | 0.46 |