Table 1.

Mean Telomere Length (T/S Ratio) and 10-year Telomere Attrition for the Full Sample and by Sociodemographic Characteristics

		Exam 1		Exam 5		10-year attrition
	N	Mean (SD)	p-value	Mean (SD)	p-value	Mean (SD)	p-value
Full sample	1,169	0.92 (0.20)		0.71 (0.14)		−0.22 (0.19)
By Exam 1 age
45-54	362	0.98 (0.21)	<0.0001	0.76 (0.15)	<0.0001	−0.23 (0.20)	0.18
55-64	369	0.93 (0.19)		0.71 (0.13)		−0.23 (0.19)
65-74	331	0.86 (0.19)		0.67 (0.14)		−0.20 (0.19)
75-84	107	0.81 (0.18)		0.63 (0.10)		−0.20 (0.17)
By sex
Female	628	0.94 (0.20)	<0.0001	0.72 (0.15)	0.0007	−0.23 (0.18)	0.12
Male	541	0.89 (0.20)		0.69 (0.14)		−0.21 (0.20)
By race/ethnicity
White	315	0.94 (0.21)	0.03	0.71 (0.14)	0.14	−0.24 (0.20)	0.0009
African-American	345	0.89 (0.20)		0.72 (0.15)		−0.19 (0.19)
Hispanic	509	0.92 (0.21)		0.70 (0.14)		−0.23 (0.19)
By Exam 1 marital status
Married	680	0.93 (0.20)	0.0003	0.72 (0.15)	0.01	−0.23 (0.20)	0.07
Not married	489	0.89 (0.20)		0.69 (0.14)		−0.21 (0.19)
By Exam 1 household income
$0-$24,999	370	0.90 (0.21)	0.28	0.69 (0.13)	0.004	−0.23 (0.19)	0.59
$25,000-$49,999	404	0.92 (0.21)		0.71 (0.14)		−0.22 (0.20)
$50,000+	395	0.93 (0.20)		0.72 (0.15)		−0.21 (0.19)
By educational attainment
High school or less	478	0.92 (0.21)	0.41	0.70 (0.15)	0.27	−0.23 (0.19)	0.14
Some college	355	0.93 (0.20)		0.71 (0.14)		−0.22 (0.20)
College or more	336	0.90 (0.19)		0.71 (0.14)		−0.20 (0.18)

Notes: 10-year attrition = 10*(Exam 5 TL – Exam 1 TL)/(Exam 5 visit date – Exam 1 visit date). P-value based on t-test for variables with two categories and one-way ANOVA for variables with more than two categories. SD=standard deviation.