Associations between serum 25 hydroxyvitamin D concentration and body composition of college male rugby players / 体力科学

This study aimed to clarify the relationship between serum 25-hydroxyvitamin D concentration body composition by examining male university rugby players in a cross-sectional manner. The subjects were 36 male rugby players (mean age: 20.2 years) who provided us with data regarding their body composition, blood biochemistry examination, and dietary intake frequency. Examination of their serum concentrations of 25-hydroxyvitamin D 【25 (OH) D】 showed that 58% (21/36 subjects) and 42% (15/36 subjects) had sufficient and insufficient intake of vitamin D, respectively. In comparison of serum 25 (OH) D concentrations between players in individual positions, it was suggested that the concentrations were significantly lower in the forward (FW) players compared with the backs (BK) players (p<0.01). The number of FW players with lipid abnormality was significantly higher than that of BK players (p<0.01). Serum 25 (OH) D concentrations showed negative correlations with weight, Body Mass Index (BMI), total body fat amount, and lean body weight. Multiple linear regression analysis suggested that serum 25 (OH) D concentration would be affected by BMI. The average serum 25 (OH) D concentration among obese class II – IV players was 27.8 ng/mL, which was significantly lower than that of players with a normal weight or obese class I (34.2 ng/mL, p<0.01, 33.1 ng/mL, p<0.01). These findings suggest that vitamin D intake among obese class II – IV players was not sufficient, despite the fact that their intake of vitamin D was 14.1 µg, which was much higher than the adequate intake level. In the future, further studies should clarify how increased intake of vitamin D could improve physical characteristics.

Serum 25-hydroxyvitamin D levels and the risk of idiopathic central precocious puberty in girls

Abstract Introduction Prior studies have found inconsistent results regarding the relationship between vitamin D status and Idiopathic Central Precocious Puberty (ICPP). Objective To assess the role of serum 25-hydroxyvitamin D (25 [OH]D) levels in ICPP development. Method The authors retrospectively collected data from 221 girls with ICPP and 144 healthy girls between January 2017 and December 2019. The participants' serum 25(OH)D levels were measured using an automatic chemiluminescence method, and the association between serum 25(OH)D levels and the risk of ICPP was assessed using multivariate logistic regression analysis. Odds Ratios (OR) with 95% Confidence Intervals (95% CI) were calculated as effect estimates. Results Serum 25(OH)D levels in the ICPP group were significantly lower than those in healthy controls (p < 0.001). Multivariate analysis indicated that girls with insufficient vitamin D levels (OR = 0.201; 95% CI 0.094-0.428; p < 0.001) and sufficient vitamin D levels (OR = 0.141; 95% CI 0.053-0.375; p < 0.001) both had a lower risk of ICPP than girls with vitamin D deficiency. Moreover, the authors found that the height (p = 0.014), weight (p = 0.014), breast stage (p = 0.010), mother's height (p < 0.001), and luteinizing hormone/follicle-stimulating hormone ratio (p = 0.010) in girls with ICPP could be associated with levels of vitamin D. Conclusion This study found that a low serum 25(OH)D level is an independent risk factor for ICPP, and several characteristics of girls with ICPP could be affected by their vitamin D status.

Significance of fibroblast growth factor 23 in metabolic bone disease of prematurity / 实用医学杂志

Objective To investigate the significance of fibroblast growth factor 23 in metabolic bone disease of prematuriy.Methods 60 patients who had been treated in our hospital from March 2016 to March 2017 were included in this study.Blood biochemistry was examined two weeks after birth,and values of blood phosphorus, serum calcium and alkaline phosphatase were recorded. Serum levels of 25 hydroxyvitamin D3,parathyroid hormone and fibroblast growth factor 23 were detected two weeks after birth. 20 premature infants with metabolic bone disease were selected as a study group. 40 infants without metabolic bone disease were treated as a control group. Two weeks after treatment,the above indicators were measured and compared in the study group. Results Serum levels of 25 hydroxyvitamin D3,parathyroid hormone and fibroblast growth factor 23 were compared between the two groups 2 weeks after birth,the difference was statistically significant(P<0.05).Levels of serum parathyroid hormone and fibroblast growth factor 23 in the study group were not statistically significant after treat-ment(P > 0.05). Levels of 25 hydroxy vitamin D3 in the study group had statistically significant after treatment (P<0.05).Conclusions Early detection of fibroblast growth factor 23 can reflect metabolic bone disease in pre-term infants.It suggests that vitamin D should be adequately supplemented in early.

Correlation between wheezing and serum 25-hydroxy vitamin D3 levels / 中国生化药物杂志

Objective To investigate the relationship between wheezing and serum levels of 25-hydroxyvitamin D3.Methods 130 children with lower respiratory tract infection were selected as the subjects, the children with wheezing in group A([Abstract] Objective To investigate the relationship between wheezing and serum levels of 25-hydroxyvitamin D3.Methods 130 children with lower respiratory tract infection were selected as the subjects, the children with wheezing in group A(n=70),normal pneumonia (no wheezing) were group B(n=60); The healthy children who were examined in the hospital at the same period were selected as the control group (n=60). The serum levels of 25-hydroxyvitamin D3 were measured by ELISA in the control and hospitalized children. The pathogens and allergens of the two groups were also detected. Results The levels of serum 25-hydroxyvitamin D3 in group A and group B were (56.92±16.88) nmol/L, (70.68±21.96) nmol/L, respectively, which was significantly lower than that in control group (82.69±17.63) nmol/L, ( t=8.50, 3.30,P=0.00,0.00); compared with group A( t=3.85, P=0.00). The positive rate of group A was 65.71%, which was significantly higher than that of group B (35.00%, χ2=12.20,P=0.00). The positive rate of group A was 30.00% compared with the control group (35.00%, χ2=0.36,P=0.54). The serum level of 25-hydroxyvitamin D3 was 75.57% in group A, which was significantly higher than that in group B (60.00%,χ2=14.21, P=0.00). The positive rate of virus detection was 57.14% in 98 children with serum 25-hydroxy vitamin D3 level<75 nmol/L, which was significantly higher than that in serum 25-hydroxy vitamin D3 level≥75 nmol/L(18.75%, χ2=14.25, P=0.00). The positive rate of allergens in serum 25-hydroxy vitamin D3 level <75 nmol/L was 35.71%, which was significantly higher than that in serum 25-hydroxy vitamin D3 level≥75 nmol/L(21.88%, χ2=2.11, P=0.14). Conclusion The main risk factor for children with wheezing is viral infection, while the low level of serum 25-hydroxy vitamin D3 in children increases the risk of viral infection, resulting in increased risk of wheezing in patients,so the clinical can occur through the detection of serum 25- hydroxyvitamin D3 levels to predict and intervention for children with wheezing.

Vitamin D intake, serum 25OHD, and bone mineral density of Korean adults: Based on the Korea National Health and Nutrition Examination Survey (KNHANES, 2011) / 한국영양학회지

PURPOSE: The purpose of this study was to estimate dietary intake of vitamin D and the relationship between serum 25-hydroxyvitamin D (25OHD) concentration and bone mineral density (BMD) in Korean adults using the 2011 data from the Korea National Health and Nutrition Examination Survey. METHODS: Daily intake of vitamin D and ratio of subjects that consumed less vitamin D than adequate intake (AI) were estimated in 4,879 Korean adults. The relationship between daily intake of vitamin D and serum 25OHD and BMD were analyzed. RESULTS: Average daily intakes of vitamin D were 3.84 ± 0.23 µg/day for men and 2.22 ± 0.11 µg/day for women. Approximately 72~97% of men and 80~99% of women consumed less than the AI of vitamin D for Koreans. Serum 25OHD concentration increased with age, and the ratios of serum vitamin D deficiency (< 20 ng/mL) were 47.8~81.1% for men and 59.4~92.8% for women. Average intake of vitamin D was higher in subjects aged < 50 yr than in those ≥ 50 yr, but lower in serum 25OHD concentration. In subjects aged < 50 yr, serum 25OHD was higher in subjects that consumed 10 µg/day of vitamin D than in those that consumed less than 5 µg/day. In female subjects aged ≥ 50 yr, average intake of vitamin D was associated with higher bone mineral density. CONCLUSION: It was found that dietary intake of vitamin D could increase serum 25OHD concentration in young adults and bone mineral density in old women. Therefore, nutrition policies for enriched foods with vitamin D and nutrition education to consume more vitamin D-rich foods are needed to ameliorate vitamin D status of the Korean population. Adequate intake for Korean population aged < 50 yr might be adjusted upwardly up to 10 µg/day.

The Relationship between Vitamin D and Glaucoma: A Kangbuk Samsung Health Study

PURPOSE: To investigate the relationship between vitamin D and glaucoma. METHODS: This retrospective, cross-sectional study included subjects who underwent a health screening at the Health Screening Center of Kangbuk Samsung Hospital from August 2012 to July 2013. All fundus photographs were reviewed by ophthalmologists. The ophthalmologists determined if an eye was glaucomatous based on the criteria set forth by the International Society of Geographical and Epidemiological Ophthalmology and by the appearance of the retinal nerve fiber layer and optic disc. If the subjects previously underwent an ophthalmologic examination, they were enrolled based on the documented history. In addition to fundus photographs, each participant underwent a systemic examination including blood sampling and sociodemographic and behavioral questionnaires. The subjects were divided into five groups according to serum 25-hydroxyvitamin D (25(OH)D) level. Multivariate logistic regression models were constructed to assess possible associations between elevated glaucoma risk and systemic factors with a p < 0.2 on univariate analysis. RESULTS: Of the 169,208 subjects older than 20 years, 123,331 were eligible for the study. There was no difference in the prevalence of glaucoma according to quintile of serum 25(OH)D level based on sex (p = 0.412 for males, p = 0.169 for females). According to the multivariable-adjusted logistic analysis, the odds ratio of glaucoma for the fourth quintile was significantly lower than that of the first quintile in females (odds ratio, 0.713; 95% confidence interval, 0.520 to 0.979). CONCLUSIONS: Lower 25(OH)D level was significantly associated with an elevated risk of glaucoma in females compared with higher 25(OH)D level. Further evaluation is needed to investigate the relationship between glaucoma and vitamin D.

Relationship of serum 25-hydroxyvitamin D and parathyroid hormone levels with blood pressure in 1 403 community adults / 中华内分泌代谢杂志

Objective To investigate the association of serum 25-hydroxyvitamin D (25OHD),parathyroid hormone (PTH),blood glucose,blood lipid,uric acid,obesity,insulin etc with blood pressure.Methods A total of 1 403 residents aged (45.3 ± 14.4) years were enrolled from Guiyang residents during a health survey in 2009.The standard questionnaire survey and physical examination were performed in all subjects.The fasting plasma glucose,postprandial 2 h plasma glucose (2hPG),triglyceride,high density lipoprotein-cholesterol,serum calcium,phosphorus,creatinine,and uric acid were determined by automatic biochemical analyzer,serum insulin by chemiluminescence method,and serum 25OHD and PTH by radioimmunoassay.Results Path analysis showed that age,gender,body mass index (BMI),insulin,25OHD,PTH,2hPG,and triglyceride affected systolic blood pressure,with the repective path coefficients of 0.453,0.294,0.120,-0.106,-0.049,0.047,0.030,and 0.030.BMI,age,gender,insulin,2hPG,triglyceride affected diastolic blood pressure,with the path coefficients 0.348,0.217,-0.146,0.134,0.035,and 0.035 respectively.Insulin,triglyceride,2hPG indirectly influenced blood pressure through BMI.BMI,PTH,and 25OHD had a significant and direct effect on blood pressure.Gender and age directly and indirectly influenced blood pressure through BMI.Conclusion The most significant influential factors on blood pressure are age,serum insulin,triglyceride,and 2hPG in the population of Guiyang.Serum 25OHD is negatively associated with systolic blood pressure while PTH level is positively associated with systolic blood pressure.

Associations between Serum 25-hydroxyvitamin D and Consumption Frequencies of Vitamin D Rich Foods in Korean Adults and Older Adults / 대한지역사회영양학회지

OBJECTIVES: This study was conducted to investigate the vitamin D status and to determine the association between serum 25-hydroxyvitamin D [25(OH)D] concentrations and consumption frequencies of vitamin D rich foods in Korean adults and older adults. METHODS: Subjects were 10,374 adults and 2,792 older adults participating in the 2008-2009 Korea National Health and Nutrition Examination Survey (KNHANES). Consumption frequencies of vitamin D rich foods were estimated by using a qualitative food frequency questionnaire (FFQ). Eleven food items such as beef, egg, mackerel, tuna, yellow corvina, pollack, anchovy, mushroom, milk, yogurt, and ice cream were selected as vitamin D rich foods based on previous research. RESULTS: The proportions of deficiency ( or = 20 ng/mL) of serum 25(OH)D concentrations from June to November and December to May in adults were 8.8%, 42.3%, 48.8%, and 28.2%, 52.8%, 19.1%, respectively. The proportions of deficiency, inadequacy and sufficiency of serum 25 (OH)D concentrations from June to November and December to May in older adults were 10.1%, 32.4%, 57.5%, and 24.1%, 45.4%, 30.5%, respectively. The mean serum 25(OH)D concentrations in adults were positively related to the consumption frequencies of mackerel, anchovy, all fish, milk and milk.dairy products. The mean serum 25(OH)D concentrations in older adults were positively related to the consumption frequencies of yellow corvina and negatively related to the consumption frequencies of ice cream. CONCLUSIONS: Our results suggest that Korean adults were more deficient in serum 25(OH)D concentrations than older adults. The consumption of vitamin D rich foods may affect vitamin D status in Korean adults. Further studies are required to confirm these findings.

The Association Between Serum 25-Hydroxyvitamin D Concentration and Consumption Frequencies of Vitamin D Food Sources in Korean Adolescents

The objectives of this study were to investigate the status of vitamin D in Korean adolescents and to determine the association between serum 25-hydroxyvitamin D (25(OH)D) concentration and consumption frequencies of vitamin D food sources by season (June to November and December to May). The subjects were 1,579 adolescents aged 12-18 years participating in the 2008-2009 Korean National Health and Nutrition Examination Survey (KNHANES). Consumption frequencies of vitamin D food sources were estimated by using a qualitative food frequency questionnaire (FFQ). Thirteen food items were selected as vitamin D food sources including beef, egg, mackerel, tuna, yellow corvine, pollack, anchovy, mushroom, milk, yoghurt, ice cream, all fish and dairy products from the FFQ based on previous research. The data was analyzed using proc survey procedures. The deficiency (5.25-12 ng/mL), inadequacy (12-20 ng/mL) and sufficiency (> 20 ng/mL) proportions of serum 25(OH)D from June to November and December to May were 9.9%, 51.4%, 38.7%, and 39.4%, 51.4%, 9.2%, respectively. Mean serum 25(OH)D concentration was positively related to the consumption frequencies of mackerel, anchovy, all fish and milk. These results suggest high proportion (> 61%) of Korean adolescents were vitamin D deficiency or inadequacy, and serum 25(OH)D was associated with the consumption of vitamin D food sources including fish and milk.

Vitamin D status in healthy adults in Guiyang of China / 中华内分泌代谢杂志

Objective To evaluate vitamin D status in healthy adults living in Guiyang. Method 1 500 healthy volunteers aged 20-79 years ( mean 45.2 years ) were recruited from a community in Guiyang by cluster sampling method. Questionnaires for living habits and fasting blood samples were collected from November, 2009 to February, 2010. Serum 25 ( OH ) D concentrations were measured by radioimmunoassay, using the DiaSorin kit,USA. Results The average serum 25 ( OH ) D level was ( 20. 4±9.0 ) ng/ml. The percentages of vitamin D deficiency [25 ( OH ) D ＜ 20 ng/ml], insufficiency [20 ng/ml ≤ 25 ( OH ) D ＜ 30 ng/ml], and sufficiency [25 ( OH ) D ≥ 30ng/ml] were 52. 3% , 32. 3% , and 15.4% , respectively. The 25 (OH) D concentrations in the young, middle-aged,and elderly were ( 18. 2±9. 2), (22. 8±8. 7), and ( 19. 9±7.8) ng/ml, respectively. The percentages of vitamin D deficiency in these groups were 62. 8%, 40. 2%, and 55.4%, being 61.6% in higher educational group ( ≥ 13 years) and 64. 4% in the group with lower body mass index ( ＜ 18.5 kg/m2 ). Conclusion Vitamin D deficiency is common in Guiyang including all age groups, especially among the youth and the elderly. Serum 25-hydroxyvitamin D level is also influenced by education, age, smoking, and other factors.

La relación entre el índice de masa corporal y el nivel de la vitamina D difiere según la edad y el origen étnico / Relationship between body mass index and vitamin D status differs by race and ethnicity

La obesidad se relaciona con valores más bajos de 25-hidroxivitamina D [25 (OH)] en suero, pero no está claro si esta relación difiere según la raza u origen étnico. Este estudio examina la relación entre la 25 (OH)D en suero y el índice de masa corporal (IMC) según la raza y el origen étnico en 3 461 mujeres (1 291 de raza blanca, 1 189 de raza negra y 981 mujeres estadounidenses de origen mexicano) de 20 a 49 años de edad provenientes de la encuesta National Health and Nutrition Examination Survey (NHANES III, 1988-94). Se midieron los valores de 25 (OH)D en suero con un equipo de radioinmuno ensayo, mientras que el IMC se calculó a partir de la altura y el peso medidos. El IMC se relacionó negativamente con la 25(OH)D en suero en los tres grupos, pero la relación fue notablemente más fuerte en las mujeres de raza blanca que en las afroamericanas o en las de origen mexicano. El ajuste para las variables de confusión redujo estas diferencias en la fuerza de la relación pero no las eliminó. En conclusión, la relación entre 25 (OH)D en suero e IMC en mujeres adultas jóvenes varía según raza y origen étnico, y es más fuerte en las de raza blanca que en las de raza negra o estadounidenses de origen mexicano. Es necesario investigar mejor la base de esta variación.

Obesity has been linked to lower serum 25 hydroxyvitaminD [25(OH)D] values, but whether this relationship differsby race/ethnicity is not clear. This study examines therelationship between serum 25(OH)D and body massindex (BMI) by race and ethnicity in 3 461 women (1 291non-Hispanic whites, 1 189 non-Hispanic blacks, 981Mexican Americans) ages 20-49 years from the thirdNational Health and Nutrition Examination Survey(NHANES III, 1988-94). Serum 25(OH)D values weremeasured with an RIA kit (DiaSorin, Stillwater OK), whileBMI was calculated from measured height and weight.BMI was negatively related to serum 25(OH)D in all threegroups, but the relationship was noticeably stronger inwhites than in blacks or Mexican Americans. Adjustingfor confounders reduced, but did not remove, thesedifferences in relationship strength. In conclusion, theserum 25(OH)D-BMI relationship in young adult womenvaries by race and ethnicity, being stronger in whites thanin blacks or Mexican Americans. The basis for this variationrequires further investigation.

Serum 25-Hydroxyvitamin D Status in Wintertime in Premenopausal Working Women

This study was performed to estimate serum 25-hydroxyvitamin D (25-OHD) level in wintertime and to evaluate the relationship between serum 25-OHD level and associated factors in 50 premenopausal working women aged 30 . 49 y in Busan. The serum 25-OHD level was measured by radioimmunoassay. Data for physiological characteristics, lifestyle factors, physical activity and nutrient intake was assessed by questionnaire including information about outdoor activity time, daily activity diary and 24hr recall method. The mean vitamin D intake was 4.24 ug, which corresponded to 84.9% of the Korean RDA. The mean level of serum 25-OHD was 25.7 ng/mL. Vitamin D deficiency (25-OHD or = 75 nmol/L) were not found in the subjects. However, the prevalence of vitamin D insufficiency (25-OHD < 15 nmol/L) and hypovitaminosis D (25-OHD < 30 nmol/L) were 12% and 60% respectively. The serum 25-OHD level showed positive significant correlations with the duration of outdoor activity per weekdays (p < 0.05). Our findings suggest that hypovitaminosis D was common in the subjects in wintertime. So nutritional education for increasing outdoor activities is needed for premenopausal working women to increase vitamin D status in wintertime.

Serum 25-Hydroxyvitamin D Status and Associated Factors in Premenopausal Working Women / 대한지역사회영양학회지

This study was performed to estimate serum 25-hydroxyvitamin D level and to evaluate the relationship between serum 25-hydroxyvitamin D level and associated factors. The subjects were 61 premenopausal working women aged 30 - 49 y in Busan. The serum 25-hydroxyvitamin D level was measured by radioimmunoassay. Data for physiological characteristics, lifestyle factors, physical activity and nutrient intake were assessed by questionnaire including information about outdoor activity time, daily activity diary and 24 hr recall method. The mean vitamin D intake was 3.12 ug, which corresponded to 62.5% of the Korean RDA. The mean level of serum 25-hydroxyvitamin D was 31.0 ng/mL. Low 25-hydroxyvitamin D (<25 nmol/L) was not found in the subjects. The serum 25-hydroxyvitamin D level showed positive significant correlations with exercise hours, daily energy expenditure, hours of outdoor activity per weekdays (p< 0.001, p< 0.05, p< 0.05). Exercise hours were found to be the most important determinant of serum 25-hydroxyvitamin D level. Therefore nutritional education for increasing hours of physical activity including indoor and outdoor exercise, is needed for premenopausal working women to increase vitamin D status.