Table 3.

The linear combination of normalized variables for the 1PC^a by gender (chronological age excluded) and the relative contribution of each physiological variable to BA^b estimation.

	Women			Men
	Loading scores	Contribution (%)	Loading scores		Contribution (%)
Mean arterial blood pressurec	0.435	18.9	0.349		12.2
Glycated hemoglobin	0.408	16.7	0.324		10.5
Waist circumference	0.173	3.0	0.491		24.1
Forced expiratory volume in 1 second	–0.138	1.9	–0.309		9.5
Maximal oxygen consumption	–0.341	11.6	–0.475		22.6
Adiponectin	0.228	5.2	–0.046		0.2
High-density lipoprotein	0.390	15.2	–0.020		0.04
Total cholesterol	0.467	21.8	0.3804		14.5
suPARd	0.238	5.7	0.254		6.4
Eigenvaluee	2.79	N/Af	2.25		N/A
Explained variance %g	30.96	N/A	25.04		N/A

^a1PC: first principal component comprising the best fit line with the largest sum of squares distances.

^bBA: biological age.

^cMean arterial blood pressure = (1/3SBP + 2/3DBP), where SBP is systolic blood pressure and DBP is diastolic blood pressure.

^dsuPAR: soluble urokinase plasminogen activator receptor.

^eEigenvalue: the sum of squared distances for 1PC.

^fN/A: Not applicable.

^gExplained variance %: how many percent does the 1PC explain of the total variance in the data set.