Table 4.

Descriptive statistics and inter-rater reliability of L*, a*, and b* values

		Black (n = 63)				White (n = 57)					Total Sample (N = 120)
Membrane	ICC	M	Mdn	SD	Min	Max	M	Mdn	SD	Min	Max	M	Mdn	SD	Min	Max
Epidermal
†L*	0.99	51.9	49.9	12.1	31.8	82.2	75.3	75.1	6.4	42.5	84.9	62.8	69.4	15.3	31.8	84.9
†a*	0.99	17.7	16.9	5.4	6.5	36.6	19.9	19.3	6.4	6.5	35.8	18.7	17.8	6.0	6.5	36.6
b*	0.99	20.2	19.6	9.3	−6.5	49.9	20.7	20.2	8.9	−3.0	50.6	20.5	19.8	9.1	−6.5	50.6
Mucous
†L*	0.92	32.2	45.6	15.7	15.5	74.7	52.0	53.1	13.2	74.7	74.7	50.6	49.4	10.8	15.5	74.7
†a*	0.95	16.7	29.6	7.6	11.7	46.6	32.7	35.4	10.0	11.0	57.6	32.3	31.8	8.2	11.0	57.6
†b*	0.94	12.3	21.2	7.4	−11.4	47.4	22.6	24.8	9.2	−1.2	56.2	22.3	22.5	9.0	−11.4	56.2
Vaginal
†L*	0.95	60.3	61.6	8.6	40.2	76.7	53.6	54.3	12.1	28.8	73.7	57.2	59.2	10.8	28.8	76.7
a*	0.93	32.6	32.7	5.6	20.9	46.6	32.0	30.7	7.7	10.1	59.4	32.3	31.8	6.6	10.1	59.4
b*	0.98	20.1	20.7	10.2	−16.9	50.8	18.7	18.2	10.0	−7.5	58.9	19.5	19.8	10.1	−16.9	58.9

^†Mean difference between Black and White subgroups, p < 0.05; ICC = Intraclass correlation coefficient, estimate of interrater reliability of skin color measurements.