Table 2.

Dermal Thickness Averages, Measurement Errors, and Reliability by Image Categorization

		Rater 1		Rater 2			Rater 1	Rater 2	Inter-rater
	N	Mean (SD)	SEM	Mean (SD)	SEM	p*	ICC**	ICC**	ICC***
All	63	1.64 (0.42)	0.05	1.74 (.35)	0.04	<0.01	0.94	0.98	0.86
95% CI							0.91–0.96	0.97–0.99	0.75–0.92
S. Axis	31	1.70 (0.47)	0.08	1.78 (0.36)	0.06	0.16	0.92	0.98	0.83
95% CI							0.86 –0.96	0.97 – 0.99	0.66 – 0.92
L. Axis	32	1.58 (0.37)	0.06	1.69 (0.28)	0.05	<0.01	0.97	0.98	0.90
95% CI							0.94 –0.98	0.96 – 0.99	0.70 – 0.96
Floating	31	1.75 (0.37)	0.07	1.78 (0.30)	0.05	0.61	0.88	0.97	0.75
95% CI							0.78 – 0.94	0.95 – 0.99	0.48 – 0.88
Surface	32	1.53 (0.45)	0.08	1.70 (0.35)	0.06	<0.01	0.97	0.98	0.92
95% CI							0.95 – 0.99	0.97 – 0.99	0.51 – 0.97
S. Axis x Floating	15	1.84 (0.41)	0.11	1.82 (0.34)	0.09	0.80	0.78	0.98	0.63
95% CI							0.48 – 0.92	0.95 – 0.99	0.17 – 0.88
S. Axis x Surface	16	1.56 (0.49)	0.12	1.74 (0.39)	0.10	<0.01	0.98	0.99	0.93
95% CI							0.95 – 0.99	0.97 – 1.0	0.30 – 0.98
L. Axis x Floating	16	1.66 (0.30)	0.08	1.74 (0.26)	0.06	0.08	0.97	0.97	0.89
95% CI							0.93 – 0.99	0.93 – 0.99	0.68 – 0.96
L. Axis x Surface	16	1.51 (0.42)	0.10	1.65 (0.32)	0.08	<0.01	0.96	0.98	0.90
95% CI							0.92 – 0.99	0.96 – 0.99	0.57 – 0.97

S. Axis = Short Axis; L. Axis = Long Axis; SEM= Standard Error of the Mean, and 95% confidence interval (CI) is assumed.

^*p-value for paired t-test between rater 1 and rater 2 on same image; due to missing values, data not equally paired by site for short/long or floating/surface, so comparison between values within rater for these variables should not be made using these data.

^**two-way mixed effects model for consistency;

^***two-way random effects model for agreement