Table 3.

Pathologist’s characteristics, clinical experience and ratings of difficulty and confidence on melanocytic skin lesions as predictor variables and average zoom, maximum zoom, and zoom variance as outcome variables. Contrast specifies the difference in the mean outcome among a predictor variable’s categories. For example, 0.39 indicates that mean of maximum zoom for pathologists in the older age group (50-64 years) was 0.39 magnification level higher than for pathologists in the younger age group (40-49 years). As reflected in Table 1, experience, caseload, difficulty, and confidence rating were analyzed as ordinal variables to investigate trends and thus contrast represents the difference in the mean outcome comparing groups one apart on the ordinal scale.

Pathologists’ demographics, clinical characteristics and ratings of difficulty and confidence on melanocytic skin lesions	Average zoom		Maximum zoom		Zoom variance
	Contrast	P-value	Contrast	P-value	Contrast	P-value
Pathologists’ demographics
Gender (Female vs. Male)	0.03	0.878	0.05	0.825	0.22	0.290
Age (50–64 vs. 20–49)	0.29	0.192	0.39	0.068	0.41	0.038
Clinical experience level
Board certification or Fellowship training (Yes vs. No)	−0.62	0.003	−0.45	0.037	−0.45	0.030
Experience with melanocytic skin lesions	0.12	0.286	0.12	0.266	0.16	0.100
Caseload of melanocytic skin lesionsa	−0.35	0.015	−0.29	0.039	−0.31	0.017
Ratings on melanocytic skin lesions
Difficulty levela	−0.05	0.765	−0.03	0.849	−0.09	0.534
Confidence levela	−0.21	0.044	−0.19	0.059	−0.17	0.075

^aOrdinal variable, summarized in Table 1.