Shorter Leukocyte Telomere Length in Midlife Women with Poor Sleep Quality

Table 1

Characteristics of the study sample (𝑛=245 unless otherwise noted).

Variable	Mean or %	SD
Age (years)	57.5	4.4
Race (% Caucasian)	84.5%
Body mass index (kg/m^2)	24.4	4.7
Household income (% ≥75 K/year)^a	67.2%
Perceived stress (PSS score)^b	23.2	6.0
Time in bed (hours)^c	8.0	1.0
Sleep duration (hours)^d	7.2	1.0
Sleep onset latency (minutes)	17.2	18.9
Sleep quality (1 = very bad, 5 = very good)	3.8	0.8
Telomere Length (T/S converted to base pairs)	5547.0	330.7

^a𝑛=235, ^b𝑛=241, ^c𝑛=238, ^d𝑛=243.