The effects of collection and storage conditions in the field on salivary testosterone, cortisol, and sIgA values

唾液 医学 内分泌学 内科学
作者
Stacy Rosenbaum,Lee T. Gettler,Thomas W. McDade,Nikola M. Belarmino,Christopher W. Kuzawa
出处
期刊:Annals of Human Biology [Informa]
卷期号:45 (5): 428-434 被引量:14
标识
DOI:10.1080/03014460.2018.1495263
摘要

Aim: To determine if field-typical storage and collection conditions are related to salivary testosterone (T), cortisol (cort) and secretory immunoglobulin A (sIgA) as measured using commercially available kits.Subjects and methods: This study assessed whether storage time (∼6 months to 1.5 years) at −35 °C impacted levels of the measured biomarkers (n = 10,247 samples). For a sub-set of T samples (n = 2954), we also evaluated the impact of collection conditions, such as time spent at room temperature in participants' homes (0–39 hours) and time spent in coolers (0.3–10 hours) in transit.Results: T was unrelated to storage and collection variables and there was no evidence of reduced sample fidelity at longer storage times. Cort samples stored at −35 °C for longer had significantly lower values, but the effect was small (β = −0.003 nmol/L/day, SE <0.001, p = 0.005). sIgA trended higher with longer storage at −35 °C (β = 0.84 µg/mL/day, SE = 0.45, p = 0.063). Collection and storage time variables did not improve the fit of any of the models except the one that evaluated cortisol.Conclusions: Salivary T was unaffected by extended storage at −35 °C and only a weak relationship was found between storage time and salivary cort or sIgA. Findings underscore the robustness of these biomarkers under field-typical freezer storage conditions.
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