Table 3.

Spearman Correlations of Proteins and Polypeptides With Age in Healthy Adults

Analyte	All Adults (n = 160)		Men (n = 80)		Women (n = 80)
	r	p	r	p	r	p
GDF8 prodomain	.05	.52	.01	.93	.09	.39
GDF8 mature protein	−.08	.29	−.09	.38	−.06	.57
GDF11 prodomain	.30	.001	.14	.27	.47	.0004
GDF11 mature protein	.23	.004	.29	.009	.18	.10
FST315	.32	<.0001	.48	<.0001	.19	.09
FST303	−.06	.43	−.17	.14	.07	.55
WFIKKN1	−.21	.008	−.21	.06	−.19	.08
WFIKKN2	.18	.02	.22	.05	.14	.21