Hair cortisol and self-perceived stress in adolescents with multi-system functional somatic disorders 2024 Nyengaard, Wyller et al

Abstract

Background
Long-term stress causing altered hypothalamic–pituitary–adrenal (HPA) axis dynamics with cortisol dysfunction may be involved in the pathophysiology of functional somatic disorders (FSD), but studies on adolescents with multi-system FSD are lacking. Therefore, we investigated: 1) whether hair cortisol concentration (HCC) differentiates adolescents with multi-system FSD from a) a population-based sample and b) a subgroup derived from the sample reporting a high physical symptom load, and 2) whether FSD population HCC is associated with primary symptom presentations and self-perceived stress.

Methods
We used data from a clinical sample with multi-system FSD (N = 91, age 15–19 years) and a population-based sample (N = 1,450, age 16–17 years) including a subgroup with top 10% total scores on physical symptoms (N = 147). Density plots and multiple linear regression were applied to compare HCC between groups. In the clinical sample, multiple linear regression was employed to assess the association between HCC and primary symptom clusters and self-perceived stress.

Results
Median HCC was lower in the clinical sample than in the population-based sample (β = 0.80 (95%CI: 0.66, 0.97)), but not significantly different from median HCC in the derived subgroup (β = 0.84 (95%CI: 0.66, 1.07)). In the clinical sample, HCC was not significantly associated with primary symptom clusters (F(2, 82) = 0.13, p = 0.88) or self-perceived stress (F(4, 83) = 1.18, p = 0.33).

Conclusion
Our findings indicate that HCC is lowered in adolescents with multi-system FSD but not significantly associated with primary symptom presentations or self-perceived stress. Future studies including multiple measures of HPA axis dynamics alongside psychological measures may further elucidate the role of long-term stress in FSD.

Open access, https://bmcpsychiatry.biomedcentral.com/articles/10.1186/s12888-024-05518-4

 

Was this study needed? No.

Will they stop claiming that stress plays a role in FND, because cortisol or not? No.

Will they keep searching for something, anything, to support their belief system? The conclusion says so with more demand for yet more useless studies about nothing.