Table 3.

Comparison of the thickness of stratum corneum.

Grade	Gender				P value (in between male and female SS-OCT images)
	Male		Female
	Sample size of image data (n)	Thickness of stratum corneum (μm) Median (range)†	Sample size of image data (n)	Thickness of stratum corneum (μm) Median (range)†
Grade 0	300	44.8 (37.9–53.9)	325	41.7 (31.6–51.0)	0.001
Grade 1	250	44.2 (28.7–54.7)	500	40.0 (34.1–49.2)	0.001
Grade 2	450	35.2 (23.6–45.9)	650	25.7 (17.3–39.6)	0.009
Grade 3	275	18.5 (10.5–22.3)	400	11.2 (6.0–17.7)	0.023
Overall P value		0.001		0.001
Post hoc multiple grade comparison
0 versus 1		0.363		0.679
0 versus 2		0.003		0.001
0 versus 3		0.001		0.001
1 versus 2		0.109		0.001
1 versus 3		0.004		0.001
2 versus 3		0.008		0.001

  ^†Values are expressed as median (minimum–maximum).