Table 3.
The means and standard deviations for CCT 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 CCT values |
Observer 1 |
Observer 2 |
||
|---|---|---|---|---|
| USP | SP-2000P | z-ring CS4 | z-ring CS4 | |
| Mean ± SD* |
555.11 ± 35.83 |
535.82 ± 41.10 |
552.57 ± 36.83 |
554.97 ± 36.34 |
| Intra-observer repeatability (p-value) |
0.91 |
0.20 |
0.45 |
0.54 |
| |
Mean difference ± SD* |
Limits of agreement |
p-value |
|
| Inter-observer reproducibility with z-ring CS4** |
-2.40 ± 9.10 |
+39.90, -38.70 |
0.16 |
|
| USP vs. SP-2000P |
19.30 ± 19.60 |
+57.70, -19.20 |
|
|
| USP vs. z-ring CS4 |
2.50 ± 5.70 |
+16.30, -11.20 |
||
| SP-2000P vs. z-ring CS4 | -16.70 ± 18.60 | +23.70, -57.20 | ||
Standard deviation*.
Paired test**.