不同种族和原籍的第一代移民中黑色素水平与维生素D的关系:一项加拿大全国性比较横断面研究。

Melanin levels in relation to vitamin D among first-generation immigrants from different ethnic groups and origins: A comparative national Canadian cross-sectional study.

作者信息

Yousef Said, Papadimitropoulos Manny, Faris MoezAlIslam, Hasan Hayder, Hossain Alomgir, Colman Ian, Manuel Douglas, Wells George A

机构信息

School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada.

Cardiovascular Research Methods Centre, University of Ottawa Heart Institute, Ottawa, ON, Canada.

出版信息

Front Med (Lausanne). 2023 Jan 9;9:992554. doi: 10.3389/fmed.2022.992554. eCollection 2022.

Abstract

INTRODUCTION

Immigrants to Western countries tend to have darker skin than native-born populations. We examined the relationship between skin melanin and serum vitamin D (vitD) [S-25(OH)D] levels and explored whether melanin levels explained S-25(OH)D variations between immigrants and native-born Canadians. This study offers novel findings as no such study has been conducted.

METHODS

We used a national cross-sectional population-based design with data from the Canadian Health Measures Survey (CHMS). Skin melanin levels among first-generation immigrants based on their ethnicity and origin/country of birth were compared with white and native-born populations. We assessed the association between S-25(OH)D and melanin after adjusting for independent variables related to S-25(OH)D, melanin level, and immigration status.

RESULTS

Of 11,579 participants, 21.9% were immigrants aged 3-79 years (mean age 39.23 years). Compared with non-immigrants, immigrants had lower S-25(OH)D levels (mean: 51.23 vs. 62.72; 95% CI: 8.37, 14.62; < 0.001) but higher melanin levels (mean []: 17.08 [0.25] vs. 16.29 [0.29]; 95% CI: -1.29, -0.281; = 0.004). Melanin did not differ by length of stay in Canada but was weakly positively correlated ( = 0.088, < 0.001) with S-25(OH)D. Sex (male), age (≥18 years), summer/fall seasons, sunlight exposure, sunscreen non-use, smoking, and alcohol consumption were associated with higher melanin levels, whereas indoor tanning use was not.

CONCLUSION

Skin melanin levels were associated with sociodemographic and behavioral characteristics. Immigrants had higher melanin levels, but melanin did not differ by length of stay in Canada. The weak positive correlation between melanin and S-25(OH)D suggested confounding factors may impact the relationship between melanin levels, S-25(OH)D, and immigration status.

摘要

引言

移民到西方国家的人群往往比本土出生的人群肤色更深。我们研究了皮肤黑色素与血清维生素D(维生素D)[S-25(OH)D]水平之间的关系,并探讨了黑色素水平是否能解释移民与加拿大本土出生人群之间S-25(OH)D的差异。由于此前尚未进行过此类研究,本研究提供了新的发现。

方法

我们采用了基于全国横断面人群的设计,使用来自加拿大健康措施调查(CHMS)的数据。将第一代移民根据其种族和出生来源/国家划分的皮肤黑色素水平与白人和本土出生人群进行比较。在对与S-25(OH)D、黑色素水平和移民身份相关的自变量进行调整后,我们评估了S-25(OH)D与黑色素之间的关联。

结果

在11579名参与者中,21.9%为3至79岁的移民(平均年龄39.23岁)。与非移民相比,移民的S-25(OH)D水平较低(平均值:51.23对62.72;95%置信区间:8.37,14.62;<0.001),但黑色素水平较高(平均值[]:17.08[0.25]对16.29[0.29];95%置信区间:-1.29,-0.281;=0.004)。黑色素水平在加拿大的停留时间上没有差异,但与S-25(OH)D呈弱正相关(=0.088,<0.001)。性别(男性)、年龄(≥18岁)、夏/秋季、阳光暴露、不使用防晒霜、吸烟和饮酒与较高的黑色素水平相关,而使用室内晒黑则无关。

结论

皮肤黑色素水平与社会人口学和行为特征相关。移民的黑色素水平较高,但黑色素水平在加拿大的停留时间上没有差异。黑色素与S-25(OH)D之间的弱正相关表明,混杂因素可能会影响黑色素水平、S-25(OH)D和移民身份之间的关系。

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