Kristensen Sheila K, Larsen Sofus C, Olsen Nanna J, Fahrenkrug Jan, Heitmann Berit L
Research Unit for Dietary Studies at The Parker Institute, The Capital Region, Copenhagen, Denmark.
Research Unit for Dietary Studies at The Parker Institute, The Capital Region, Copenhagen, Denmark.
Psychoneuroendocrinology. 2017 Mar;77:182-185. doi: 10.1016/j.psyneuen.2016.12.016. Epub 2016 Dec 31.
Hair cortisol concentration (HCC) has been suggested as a promising marker for chronic stress. However, studies investigating the influence of hair dyeing and hair washing frequency on HCC have shown inconsistent results.
To examine associations between HCC and hair dyeing status or weekly hair washing frequency among women.
This cross-sectional study was based on data from 266 mothers participating in the Healthy Start intervention study. HCC was measured in the proximal end of the hair (1-2cm closest to the scalp) while hair dyeing status, frequency of hair washing and covariates were reported by the women. Linear regression analyses were applied to assess the associations between HCC and hair dyeing or weekly frequency of hair washing.
No statistically significant difference (p=0.91) in HCC was found between women who dyed hair (adjusted mean: 137pg/mg [95% CI: 122,153]) and women with natural hair color (adjusted mean: 139pg/mg [95% CI: 123,155]). Frequency of hair washing was not associated with HCC (β: -3.7 [95% CI: -9.0, 1.5; P=0.20]).
This study of 266 Danish women provides no evidence in support of an association between HCC and hair dyeing status or hair washing frequency.
头发皮质醇浓度（HCC）被认为是慢性应激的一个有前景的标志物。然而，研究头发染色和洗发频率对HCC影响的结果并不一致。
研究女性中HCC与头发染色状况或每周洗发频率之间的关联。
这项横断面研究基于266名参与“健康起步”干预研究的母亲的数据。在头发近端（最靠近头皮的1-2厘米处）测量HCC，同时由这些女性报告头发染色状况、洗发频率和协变量。应用线性回归分析来评估HCC与头发染色或每周洗发频率之间的关联。
染发女性（调整后均值：137pg/mg [95%可信区间：122,153]）和自然发色女性（调整后均值：139pg/mg [95%可信区间：123,155]）的HCC没有统计学上的显著差异（p = 0.91）。洗发频率与HCC无关（β：-3.7 [95%可信区间：-9.0, 1.5；P = 0.20]）。
这项对266名丹麦女性的研究没有提供证据支持HCC与头发染色状况或洗发频率之间存在关联。
