Table 3

		R²	Std. error of the estimate	P Value	Coefficients β	Slope of the age group
Age	Average area of Collagen fibres	0.11	7.57	0.07	9.35	1.5
	Optic density of elastic fibres	0.80	4.33	0.000*	68.91	-4.93
	Epidermal thickness (µm)	0.03	51.85	0.3	88.13	-5.52
	Dermal thickness (µm)	0.01	407.53	0.4	799.3	6.3
	Number of hair follicles/field	0 .60	14.87	0.000*	59.78	-10.43
	Number of sebaceous glands/field	0.32	1.91	0.001*	7.16	-0.76

R²: R square; Std. error: Standard error; *statistically significant

Table 3: Regression analysis of the age (independent variable) versus the data of skin structures (dependent variables).