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Assessing Systemic Stress in Otolaryngology: Methodology and Feasibility of Hair and Salivary Cortisol Testing
Dane J Genther1, Mark L Laudenslager2, Yoon-Kyu Sung3
1Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, 601 N. Caroline St., Suite 6210, Baltimore, Maryland 21287, USA ; Center on Aging and Health, Johns Hopkins University, 2024 E. Monument St. Suite 2-700, Baltimore, Maryland 21205, USA.
Objective:
Elevated systemic stress is a predictor of adverse health outcomes, and stress can be objectively quantified by cortisol concentration. Despite its utility, such testing is rarely performed in otolaryngology. This manuscript provides details on the principles, methodology, and feasibility of performing laboratory assessments of hair and salivary cortisol to inform researchers wishing to incorporate these novel tests in future otolaryngologic studies.
Methods:
Participants were older adults with hearing impairment. One hair sample and eight saliva samples were collected. Feasibility of study design was assessed through rates of participation in hair and saliva sampling and protocol adherence for saliva collection. Area under the curve (AUC) was used to evaluate overall secretion, and cortisol awakening response (CAR) was used to evaluate the dynamic secretion response.
Results:
From 9/1/2013 to 12/31/2013, 26/30 (86.7%) eligible participants agreed to hair sampling. All 30 subjects agreed to collect saliva, with 29 (96.7%) adhering to the collection protocol. Mean AUC was 401.2 nmol/L per hour, and CAR was 4.5 nmol/L.
Conclusions:
Evaluating systemic stress in an otolaryngologic population using hair and saliva is feasible with acceptable participation and adherence. Repeat measurements over time will allow for evaluation of changes in systemic stress in relation to treatment.
