Healthy changes in some cardiometabolic risk factors accompany the higher summertime serum 25-hydroxyvitamin D concentrations in Iranian children: National Food and Nutrition Surveillance
| Autor: | Bahareh Nikooyeh, Tirang R. Neyestani, Majid Hajifaraji, Zahra Abdollahi, Hamid Alavi-Majd, Forouzan Salehi, Amir Hossein Yarparvar |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Longitudinal study Low HDL-cholesterol Medicine (miscellaneous) Physiology 030209 endocrinology & metabolism Iran Nutrition surveillance 03 medical and health sciences 0302 clinical medicine Risk Factors Total cholesterol Vitamin D and neurology Humans Medicine Vitamin D Serum 25 hydroxyvitamin d Child Cardiometabolic risk 030109 nutrition & dietetics Nutrition and Dietetics business.industry Public Health Environmental and Occupational Health Anthropometry Cardiovascular Diseases business Research Paper |
| Zdroj: | Public Health Nutr |
| ISSN: | 1475-2727 1368-9800 |
| DOI: | 10.1017/s1368980018000630 |
| Popis: | ObjectiveTo investigate seasonal variations of vitamin D status at different latitudes and if these changes are accompanied by corresponding variations in certain health parameters in children living in a broad latitudinal range in Iran.DesignLongitudinal study.SubjectsIn total, 530 apparently healthy children aged 5–18 years were randomly selected from six regions of Iran with a latitudinal gradient from 29°N to 37·5°N. All anthropometric and biochemical assessments were performed twice during a year (summer, winter). High BMI (Z-score >1), low HDL cholesterol (150 mg/dl) were considered cardiometabolic risk factors.ResultsSerum 25-hydroxyvitamin D (25(OH)D) showed between-season variation, with significantly higher concentrations (mean (sd)) in summer v. winter (43 (29) v. 27 (18) nmol/l; Pr=−0·16; Pr=−0·09; P=0·04) and total cholesterol (r=−0·10; P=0·02) and directly correlated with change of height-for-age Z-score (r=0·09; P=0·04). Multiple stepwise linear regression analysis (β; 95 % CI) showed that winter serum 25(OH)D (−0·3; −0·4, −0·2; Pv. girls: 9·7; 5·2, 14·1; P33°N v. P=0·04) were predictors of change of serum 25(OH)D between two seasons.ConclusionsSummertime improvement of vitamin D status was accompanied by certain improved cardiometabolic risk factors, notably serum TAG, total cholesterol and BMI, in children. |
| Databáze: | OpenAIRE |
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