Table 2

Scatter plots and mean expected range of variability from each test-retest evaluation

Test-retest	Mean*	Difference*	SD*	95% CL*†	±95% CL (%)†
*Values expressed in μm
†95% confidence limits.
Intraobserver analysis
M1–M2	569.7	3.5	9.1	563.6–575.8	1.07
M1–M3	570.1	2.6	11.2	564.3–575.9	1.02
M2–M3	568.6	0.9	10.7	564.6–572.6	0.70
E1–E2	569.7	1.5	7.4	566.0–573.3	0.64
E1–E3	569.8	1.2	7.8	566.3–573.3	0.61
E2–E3	569.1	0.2	8.0	566.5–571.5	0.44
G1–G2	565.7	2.5	8.0	560.9–570.5	0.85
G1–G3	565.5	2.9	10.8	559.6–571.5	1.05
G2–G3	564.2	0.3	6.8	562.0–566.5	0.40
Mean	568.0	1.7	8.9	563.7–572.3	0.75
Interobserver analysis
M1–E1	570.9	1.0	11.0	566.8–575.1	0.72
M1–G1	569.2	4.4	15.9	560.2–578.2	1.57
E1–G1	568.7	3.4	11.2	562.1–575.3	1.16
M2–E2	568.4	0.9	11.5	564.2–572.6	0.74
M2–G2	566.2	3.5	10.7	559.6–572.7	1.15
E2–G2	566.6	4.4	11.0	559.0–574.3	1.34
M3–E3	569.0	0.3	12.8	565.0–572.9	0.69
M3–G3	566.4	4.7	12.9	558.1–574.8	1.47
E3–G3	566.6	5.0	9.0	559.0–574.2	1.34
M1–E2	570.2	2.5	12.0	564.2–576.1	1.04
M1–E3	570.3	2.2	11.7	564.7–575.9	0.98
M1–G2	567.9	7.0	12.5	557.4–578.5	1.86
M1–G3	567.8	7.3	12.5	556.9–578.6	1.92
M2–E1	569.2	2.5	10.9	563.6–574.8	0.98
M2–E3	568.5	1.2	11.1	564.1–572.9	0.77
M2–G1	567.4	0.9	14.3	562.5–572.4	0.88
M2–G3	566.0	3.8	11.4	558.9–573.1	1.25
M3–E1	569.6	1.6	13.8	564.1–575.1	0.97
M3–E2	568.8	0.1	13.5	564.9–572.7	0.69
M3–G1	567.9	1.8	17.0	561.3–574.5	1.17
M3–G2	566.6	4.3	13.1	558.5–574.7	1.43
E1–G2	567.4	6.0	9.6	558.7–576.1	1.54
E1–G3	567.2	6.3	9.5	558.2–576.3	1.59
E2–G1	567.9	1.9	12.5	562.5–573.4	0.96
E2–G3	566.5	4.8	10.8	558.6–574.3	1.39
E3–G1	568.1	2.1	12.8	562.3–573.8	1.02
E3–G2	566.8	4.7	10.0	559.2–574.3	1.33
Mean	568.0	3.3	12.0	561.3–574.7	1.18