Social relationships, sleep quality, and interleukin-6 in aging women.
This study examined the interplay of social engagement, sleep quality, and plasma levels of interleukin-6 (IL-6) in a sample of aging women (n = 74, aged 61-90, M age = 73.4). Social engagement was assessed by questionnaire, sleep was assessed by using the NightCap in-home sleep monitoring system and the Pittsburgh Sleep Quality Index, and blood samples were obtained for analysis of plasma levels of IL-6. Regarding subjective assessment, poorer sleep (higher scores on the Pittsburgh Sleep Quality Index) was associated with lower positive social relations scores. Multivariate regression analyses showed that lower levels of plasma IL-6 were predicted by greater sleep efficiency (P < 0.001), measured objectively and by more positive social relations (P < 0.05). A significant interaction showed that women with the highest IL-6 levels were those with both poor sleep efficiency and poor social relations (P < 0.05). However, those with low sleep efficiency but compensating good relationships as well as women with poor relationships but compensating high sleep efficiency had IL-6 levels comparable to those with the protective influences of both good social ties and good sleep.
Friedman
Elliot M
EM
Robert Wood Johnson Health & Society Scholars Program, Department of Population Health Sciences, University of Wisconsin, Madison, WI 53726, USA. friedman1@wisc.edu
Hayney
Mary S
MS
Love
Gayle D
GD
Urry
Heather L
HL
Rosenkranz
Melissa A
MA
Davidson
Richard J
RJ
Singer
Burton H
BH
Ryff
Carol D
CD
D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000097:blood* / Q000502:physiology*; D005260:Female; D006801:Humans; D015850:Interleukin-6 / Q000097:blood*; D007398:Interpersonal Relations; D008875:Middle Aged; D012890:Sleep / Q000502:physiology*; D011795:Surveys and Questionnaires
D015850:Interleukin-6