title: Synchrony of diurnal cortisol pattern in couples.
abstract: Cortisol is a biomarker of stress reactivity, and its diurnal pattern is an indicator of general neuroendocrine health. Despite theories conceptualizing marital dyads as dynamic systems wherein spouses are interdependent in their physiology and stress coping, little is known about the daily processes in which spouses possibly influence each other in biological stress. Nineteen heterosexual couples provided saliva samples containing cortisol 4 times a day for 4 consecutive days. We used multilevel modeling to examine whether one's cortisol awaking response (CAR) and diurnal cortisol slope (DCS) predict those of the spouse's on the same day and/or on the next day. We found that spouses synchronize their DCS, such that on days when one experiences faster or slower decline in diurnal cortisol than usual, the spouse also experiences faster or slower decline than usual. For CAR, positive synchrony was only observed in couples reporting high levels of marital strain and disagreement. Cross-lagged regression analysis reveals stability in diurnal cortisol pattern. A steeper cortisol slope on a particular day predicts a steeper slope on the next day within an individual, but no significant cross-lagged relation was found between spouses. Couples reporting more spousal support tend to have stronger stability in CAR. These findings provide evidence that spouses are interdependent in their diurnal cortisol patterns on a day-to-day basis, and that these daily dynamics are associated with marital relationship quality. The study contributes to our understanding of marital processes and biobehavioral health. It also contributes methodologically to the advancement of longitudinal dyadic analysis.
authors: Human Development and Family Studies, Department of Human Ecology, University of California, Davis, CA 95616, USA. sweliu@ucdavis.edu
authors: Siwei
authors: S
authors: Liu
authors: Michael J
authors: MJ
authors: Rovine
authors: Laura Cousino
authors: LC
authors: Klein
authors: David M
authors: DM
authors: Almeida
mesh_terms: D000223:Adaptation, Psychological / Q000502:physiology; D000328:Adult; D002940:Circadian Rhythm / Q000502:physiology*; D005191:Family Characteristics; D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000378:metabolism*; D008297:Male; D008393:Marriage / Q000523:psychology / Q000706:statistics & numerical data; D012463:Saliva / Q000378:metabolism; D018454:Spouses / Q000523:psychology / Q000706:statistics & numerical data*; D013315:Stress, Psychological / Q000378:metabolism / Q000523:psychology
chemical_list: D006854:Hydrocortisone
references: Endocr Rev. 2000 Feb;21(1):55-89
references: 10696570
references: Psychoneuroendocrinology. 2004 May;29(4):516-28
references: 14749096
references: J Pers Soc Psychol. 2010 Jan;98(1):92-103
references: 20053034
references: Aging Ment Health. 2002 Aug;6(3):266-74
references: 12217095
references: Psychoneuroendocrinology. 2009 Nov;34(10):1423-36
references: 19647372
references: Int J Psychoanal. 1958 Sep-Oct;39(5):350-73
references: 13610508
references: Psychoneuroendocrinology. 2001 Feb;26(2):189-208
references: 11087964
references: J Pers Soc Psychol. 1983 Sep;45(3):587-97
references: 6620126
references: J Gerontol B Psychol Sci Soc Sci. 2010 Sep;65(5):513-25
references: 20647348
references: Health Psychol. 2008 Jan;27(1):15-25
references: 18230009
references: Psychosom Med. 2006 Sep-Oct;68(5):657-61
references: 17012518
references: Pers Soc Psychol Rev. 2011 Nov;15(4):367-93
references: 21693670
references: Psychosom Med. 2003 Mar-Apr;65(2):313-9
references: 12652000
references: J Physiol Paris. 2011 Dec;105(4-6):195-200
references: 21782020
references: Psychopharmacology (Berl). 2005 Oct;182(1):54-7
references: 15991000
references: Psychosom Med. 1984 May-Jun;46(3):183-97
references: 6739679
references: J Adolesc Health. 2012 Dec;51(6):623-8
references: 23174474
references: Am J Community Psychol. 1990 Jun;18(3):423-38
references: 2264558
references: Psychosom Med. 1995 Jan-Feb;57(1):23-31
references: 7732155
references: N Engl J Med. 2008 Jan 3;358(1):55-68
references: 18172175
references: Pers Soc Psychol Rev. 2008 May;12(2):141-67
references: 18453476
references: Emotion. 2012 Aug;12(4):748-62
references: 21910541
references: Stress. 2004 Mar;7(1):29-37
references: 15204030
references: J Gerontol B Psychol Sci Soc Sci. 2011 Jul;66 Suppl 1:i71-81
references: 21743054
references: Psychoneuroendocrinology. 2005 Feb;30(2):139-48
references: 15471612
references: Am J Primatol. 1991;23(1):37-54
references: 31952417
references: Psychoneuroendocrinology. 2007 Jan;32(1):80-6
references: 17127010
references: Psychol Bull. 2007 Jan;133(1):25-45
references: 17201569
references: Proc Natl Acad Sci U S A. 2006 Nov 7;103(45):17058-63
references: 17075058
references: J Clin Endocrinol Metab. 1997 Aug;82(8):2458-65
references: 9253318
references: Fam Process. 2013 Jun;52(2):284-98
references: 23763687
references: Dev Med Child Neurol. 2003 Apr;45(4):274-81
references: 12647930
references: J Fam Psychol. 2005 Mar;19(1):86-97
references: 15796655
references: Child Dev. 2003 Jul-Aug;74(4):1058-63
references: 12938702
references: Psychoneuroendocrinology. 2006 Oct;31(9):1131-7
references: 16997489
references: Psychoneuroendocrinology. 2006 Jun;31(5):664-79
references: 16584847
references: Psychol Aging. 2009 Dec;24(4):819-27
references: 20025398