<p>Correlation of selected stress associated factors with vitamin D deficiency in Jordanian men and women</p>

Abstract

Background: To identify stress associated factors for vitamin D deficiency (VDD) in healthy Jordanian people based on serum 25(OH)D levels. Design: Prospective cohort study. Methods: Three hundred and seventy-one Jordanian men and women aged 17-52 years, who were identified as VD deficient 25(OH)D <30 ng/mL, were eligible to participate in the study. Serum vitamin 25(OH) D was measured using chemiluminescent immunoassay. Cortisol, parathyroid hormone, calcium, phosphate, fasting lipid profile, and blood glucose were also analyzed. Questionnaires were used to collect lifestyles parameters. Anthropometric parameters including: body mass index (BMI), waist (W) and hip (H) circumferences, W/H ratio (WHR) were also calculated. Results: The vast majority (91%) of the participants had vitamin D deficiency (25-(OH) D <30 ng/mL). Positive correlations were observed between vitamin D deficiency and the following anthropometric parameters in all study sample; gender (P=0.010), height (P=0.22), height/hip ratio (P=0.015) and waist/hip ratio (P=0.013). Lifestyle parameters that indicated very weak positive correlations with VDD were number of family members (P=0.011) and insufficient exposure to sunlight (P=0.023). The following clinical parameters showed weak or very weak correlations with VDD; serum cortisol (r=0.318), low density lipoprotein (r=0.246) and total cholesterol (r=0.133). Skin color and water pipe tobacco smoking were added to the multivariable stepwise regression analyses as they have been weakly correlated with VDD. These predictors together explained only 12.2% of the variance in serum cortisol levels in the VDD study sample. Conclusion: A weak positive association between VDD and elevated serum cortisol was observed in this study. Subcutaneous changes may be involved in that association but further studies are needed to clarify a potential role for adrenocorticotropic hormone (ACTH).

<p>Combined Effect Of Coffee Consumption And Cigarette Smoking On Serum Levels Of Vitamin B12, Folic Acid, And Lipid Profile In Young Male: A Cross-Sectional Study</p>

“…42 Many studies have positively addressed HCC and cigarette smoking as stress associated factors. 43,44 Accordingly, the variations of stress predictors such as LDL-C and TC were mostly coffee rate consumption dependent, as seen in prior associated studies. 44,45 In this context, our results confirmed the importance of the daily coffee consumption rate on an individual's health as noted in previous studies.…”

Monthly fluctuations in 25-hydroxy-vitamin D levels in day and rotating night shift hospital workers

“…Thus, poor quality of sleep in turn might influence 25OHD metabolism, because 25OHD receptors are widely distributed in different regions of the human brain, such as the hypothalamus, prefrontal cortex, central gray, substantia nigra and raphe nuclei, all of which have important roles in sleep regulation [25]. Finally, we cannot exclude a possible interaction between vitamin D and cortisol levels or stress-induced hormonal modifications, since it is very likely that rotating night shift hospital workers may suffer from high level of stress [26].…”

Vitamin D deficiency and associated factors in south Korean childbearing women: a cross-sectional study

“…We also found that stress levels affect vitamin D deficiency in women of childbearing age, consistent with the results of a study by Gwon et al which showed that perceived stress was a risk factor for low 25(OH) D levels in older women [ 12 ]. Abu-Samak et al also reported that there was a weak positive association between vitamin D deficiency and elevated serum cortisol, although it is difficult to determine a direct link between low 25(OH) D levels and stress [ 34 ]. In a similar study, vitamin D levels decreased with the subjective perception of depression [ 15 ], while higher serum 25(OH) D levels showed a higher probability of positive self-perceived mental health [ 16 ]).…”