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. Author manuscript; available in PMC: 2016 Dec 1.
Published in final edited form as: J Surg Res. 2014 Nov 6;199(2):688–697. doi: 10.1016/j.jss.2014.10.055

Table 3.

Modified Scale: Correlation and Variance by Category.

Statistical Parameter Category
Surface Appearance Height Color
Cronbach’s Alpha 0.88 0.87 0.82
Intraclass Correlation1 (95% Confidence Interval) 0.59 (0.52 – 0.67) 0.56 (0.48 – 0.64) 0.46 (0.38 – 0.57)
Po 0.52 0.54 0.43
CV ± SEM 0.19 ± 0.11 0.20 ± 0.12 0.24 ± 0.10
Variance ± SEM 0.32 ± 0.26 0.30 ± 0.24 0.41 ± 0.26
1

Based on standardized items.