Association of daily stressors and salivary cortisol in spinal cord injury.
OBJECTIVE
Examine the diurnal variation of salivary cortisol in adults with spinal cord injury (SCI) and the effect of stressors on cortisol and mood.


METHODS
Ecological momentary assessment (EMA) to capture cortisol, stress, and mood from 25 persons with SCI and 26 without SCI. Data were analyzed using linear mixed models.


RESULTS
There were no systematic differences between groups on missing data. Diurnal variation of cortisol of participants with SCI reflected an expected pattern. No significant group differences for cortisol diurnal pattern, stress, or mood; when group interactions were significant, results indicated lower cortisol reactivity to stress in participants with SCI. Stress had a significant impact on positive, negative and agitated moods.


CONCLUSIONS
Stress in daily life and its association with cortisol and mood were largely similar between persons with and without SCI. A key methodological contribution is the demonstration of using EMA to collect biological and behavioral data in the field from participants with SCI. The use of EMA in rehabilitation psychology research has great potential to advance our understanding of the dynamics of daily life with disability.
Kalpakjian
Claire Z
CZ
Department of Physical Medicine and Rehabilitation.
Farrell
Debra J
DJ
Department of Physical Medicine and Rehabilitation.
Albright
Kathie J
KJ
Department of Physical Medicine and Rehabilitation.
Chiodo
Anthony
A
University of Michigan.
Young
Elizabeth A
EA
Department of Psychiatry.
D000203:Activities of Daily Living / Q000523:psychology; D000339:Affect; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000378:metabolism*; D008297:Male; D008824:Michigan / Q000453:epidemiology; D008875:Middle Aged; D010865:Pilot Projects; D012463:Saliva / Q000378:metabolism*; D012650:Self Disclosure; D013119:Spinal Cord Injuries / Q000453:epidemiology / Q000378:metabolism* / Q000523:psychology*; D013315:Stress, Psychological / Q000453:epidemiology / Q000378:metabolism* / Q000523:psychology*
D006854:Hydrocortisone
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