scholarly journals Vitamin D status and associated factors among HIV-infected children and adolescents on antiretroviral therapy in Kampala, Uganda

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0253689
Author(s):  
Thereza Were Piloya ◽  
Sabrina Bakeera–Kitaka ◽  
Grace Paul Kisitu ◽  
Richard Idro ◽  
Sarah E. Cusick
Keyword(s):  
Vitamin D ◽  
Immune Responses ◽  
Serum Vitamin ◽  
Vitamin D Insufficiency ◽  
Vitamin D Supplementation ◽  
P Value ◽  
Vitamin D Status ◽  
Cross Sectional ◽  
Serum Vitamin D ◽  
Art Initiation

Background A high prevalence of suboptimal serum vitamin D has been reported among HIV infected children even in countries with high sunshine abundance throughout the year. Vitamin D is a potent immune modulator of innate and adaptive immune responses. Vitamin D regulates immune responses through the vitamin D receptor on CD4 cells. We aimed to determine the vitamin D status of HIV infected children and factors associated with suboptimal vitamin D. Methods This was a cross sectional study. We enrolled children aged between 6 months and 12 years attending an outpatient paediatric HIV clinic. Serum 25-hydroxyvitamin D (25(OH)D) was measured using the electrochemoluminisence method. Suboptimal vitamin D was defined as 25(OH)D <30 ng/ml, vitamin D insufficiency and deficiency were 21–29 ng/ml and <20 ng/ml respectively. Anthropometry, physical exam and medical history were documented. Logistic regression was performed. Results We enrolled 376 children with mean age (sd) 8.05 years (3.03), a median (IQR) duration of ART of 5.9 years (3.2–8.4). Majority of the children (64%) had been exposed to non nucleoside reverse transcriptase inhibitors (NNRTIs). A third were severely immunosuppressed (CD4% ≤15%) at ART initiation. At the time of the study, the majority (89%) were virologically suppressed (VL <1000 copies/ml). Prevalence of 25(OH)D <30 ng/ml was 49 (13%) of 375 participants and 11 (3%) had 25(OH)D <20 ng/ml. Lopinavir/ritonavir regimen was independently associated with 25(OH)D <30 ng/ml; OR 0.27 CI (0.13–0.57), p value-0.002. Serum 25(OH)D <20 ng/ml was associated with CD4 count ≤15% at ART initiation OR 6.55(1.30–32.9), p value—0.023 and use of NNRTIs; OR 10.9(1.22–96.2), p value—0.03. Conclusion We found a low prevalence of suboptimal vitamin D compared to earlier reports. Severe immunosuppression at ART initiation and use of NNRTIs increases odds of deficiency. Vitamin D supplementation should be considered in severely immunosuppressed children initiating ART.

scholarly journals Distribution of vitamin D status in the UK: a cross-sectional analysis of UK Biobank

BMJ Open ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. e038503
Author(s):  
Liang-Yu Lin ◽  
Liam Smeeth ◽  
Sinead Langan ◽  
Charlotte Warren-Gash
Keyword(s):  
Public Health ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Serum Vitamin ◽  
Vitamin D Supplementation ◽  
Vitamin D Status ◽  
Uk Biobank ◽  
Cross Sectional ◽  
Serum Vitamin D ◽  
The Uk

ObjectiveNo recent large studies have described the distribution of vitamin D status in the UK. Understanding the epidemiology of vitamin D deficiency is important to inform targeted public health recommendations. This study aimed to investigate the distribution of factors associated with serum vitamin D status in a large national cohort.DesignA cross-sectional study.SettingThe UK Biobank, a prospective cohort study following the health and well-being of middle-aged and older adults recruited between 2006 and 2010.ParticipantsA total of 449 943 participants aged 40–69 years with measured serum vitamin D status were eligible for the analysis. Participants completed a questionnaire about sex, age, ethnic background, vitamin D supplementation, smoking, drinking and socioeconomic status.Primary and secondary outcome measuresWe investigated the distribution of serum vitamin D status and the association between demographic factors and vitamin D deficiency or insufficiency. Vitamin D deficiency was defined as a serum 25-hydroxyvitamin D level <25 nmol/L. Multivariable logistic regression was used to assess the association between demographic factors and vitamin D status.ResultsAsian (n=4297/8000, 53.7%) and black (n=2459/7046, 34.9%) participants had a higher proportion of vitamin D deficiency than white participants (n=50 920/422 907, 12%). During spring and winter, the proportion of vitamin D deficiency was higher across the UK and higher in the north than in the south. Male sex, abnormal body mass index, non-white ethnic backgrounds, smoking and being more socioeconomically deprived were associated with higher odds of vitamin D deficiency. Increasing age, taking vitamin D supplements and drinking alcohol were associated with lower odds of deficiency.ConclusionsVitamin D status varied among different ethnic groups and by season and geographical area within the UK. Taking supplements was associated with a lower risk of vitamin D deficiency. These findings support the vitamin D supplementation recommendations of Public Health England.

Serum Vitamin D: Correlates of Baseline Concentration and Response to Supplementation in VITAL-DKD

2021 ◽  
Author(s):  
Cora M Best ◽  
Leila R Zelnick ◽  
Kenneth E Thummel ◽  
Simon Hsu ◽  
Christine Limonte ◽  
...  
Keyword(s):  
Vitamin D ◽  
Vitamin D3 ◽  
Parent Compound ◽  
Serum Vitamin ◽  
Vitamin D Supplementation ◽  
Total Serum ◽  
P Value ◽  
Hydroxyvitamin D ◽  
Serum Vitamin D ◽  
Vitamin D3 Supplementation

Abstract Context The effect of daily vitamin D supplementation on the serum concentration of vitamin D (the parent compound) may offer insight into vitamin D disposition. Objective To assess the total serum vitamin D response to vitamin D3 supplementation and whether it varies according to participant characteristics. To compare results with corresponding results for total serum 25-hydroxyvitamin D (25(OH)D), which is used clinically and measured in supplementation trials. Design Exploratory study within a randomized trial. Intervention 2,000 International Units of vitamin D3 per day (or matching placebo). Setting Community-based. Participants 161 adults (mean ± SD age 70 ± 6 years; 66% males) with type 2 diabetes. Main Outcome Measures Changes in total serum vitamin D and total serum 25(OH)D concentrations from baseline to year 2. Results At baseline, there was a positive, nonlinear relation between total serum vitamin D and total serum 25(OH)D concentrations. Adjusted effects of supplementation were a 29.2 (95% CI: 24.3, 34.1) nmol/L increase in serum vitamin D and a 33.4 (95% CI: 27.7, 39.2) nmol/L increase in serum 25(OH)D. Among those with baseline 25(OH)D &lt; 50 compared with ≥ 50 nmol/L, the serum vitamin D response to supplementation was attenuated (15.7 vs 31.2 nmol/L; interaction p-value = 0.02), whereas the serum 25(OH)D response was augmented (47.9 vs 30.7 nmol/L; interaction p-value = 0.05). Conclusions Vitamin D3 supplementation increases total serum vitamin D and 25(OH)D concentrations with variation according to baseline 25(OH)D, which suggests that 25-hydroxylation of vitamin D3 is more efficient when serum 25(OH)D concentration is low.

Myopia in school-aged children with preterm birth: the roles of time spent outdoors and serum vitamin D

2020 ◽  
pp. bjophthalmol-2019-315663
Author(s):  
Hung-Da Chou ◽  
Tsung-Chieh Yao ◽  
Yu-Shu Huang ◽  
Chung-Ying Huang ◽  
Men-Ling Yang ◽  
...  
Keyword(s):  
Vitamin D ◽  
Preterm Birth ◽  
Serum Vitamin ◽  
Cross Sectional Study ◽  
Vitamin D Insufficiency ◽  
Cross Sectional ◽  
Lower Odds ◽  
Hydroxyvitamin D ◽  
Serum Vitamin D ◽  
School Aged Children

AimsTo analyse the factors associated with myopia in school-aged children with preterm birth and with or without retinopathy of prematurity (ROP).MethodsChildren born prematurely between January 2010 and December 2011 were enrolled in this cross-sectional study when they reached school age between April 2017 and June 2018 in a referral centre. The main parameters were cycloplegic refraction, time spent outdoors and serum 25-hydroxyvitamin D (25(OH)D) concentration.ResultsA total of 99 eyes from 99 children with a mean age of 6.8 years underwent analysis. The average time spent outdoors was significantly higher in the non-myopic group (0.9 ± 0.5 hours/day) than in the myopic group (0.7 ± 0.3 hours/day) (p = 0.032). After adjustment for age, sex, number of myopic parents, ROP severity, near-work time and serum 25(OH)D concentration, more time spent outdoors was correlated with a lower odds of myopia (OR, 0.13 per additional hour per day; 95% CI, 0.02–0.98; p = 0.048). Mean serum 25(OH)D concentrations were similar between the myopic and non-myopic groups (49.7 ± 13.6 and 48.8 ± 14.0 nmol/mL; p = 0.806) and were not correlated with spherical equivalence power (r = −0.09; p = 0.418). Vitamin D insufficiency was present in 57% of the participants.ConclusionsAmong preterm children with or without ROP, more time spent outdoors was associated with lower odds of myopia. The serum 25(OH)D concentration was not associated with myopia, but a high proportion of the participants had insufficient levels.

scholarly journals Association of vitamin D with adiposity measures and other determinants in a cross-sectional study of Cypriot adolescents

2014 ◽  
Vol 18 (1) ◽  
pp. 112-121 ◽  
Author(s):  
Ourania Kolokotroni ◽  
Anna Papadopoulou ◽  
Panayiotis K Yiallouros ◽  
Vasilios Raftopoulos ◽  
Christiana Kouta ◽  
...  
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Reference Group ◽  
Serum Vitamin ◽  
Sun Exposure ◽  
Dietary Vitamin ◽  
Vitamin D Status ◽  
Fat Percentage ◽  
Cross Sectional ◽  
Serum Vitamin D

AbstractObjectiveTo assess vitamin D status among Cypriot adolescents and investigate potential determinants including BMI and body fat percentage (BF%).DesignParticipants had cross-sectional assessments of serum vitamin D, physical activity, dietary vitamin D intake and sun exposure. Linear and logistic regression models were used to explore the associations of vitamin D with potential predictors.SettingHospitals, Cyprus, November 2007–May 2008.SubjectsAdolescents (n 671) aged 16–18 years.ResultsMean serum vitamin D was 22·90 (sd 6·41) ng/ml. Only one in ten children had sufficient levels of vitamin D (≥30 ng/ml), while the prevalence of vitamin D deficiency (12–20 ng/ml) and severe deficiency (<12 ng/ml) was 31·7 % and 4·0 %, respectively. Lower vitamin D was associated with winter and spring season, female gender, reduced sun exposure in winter and darker skin. Participants with highest BMI and BF% when compared with a middle reference group had increased adjusted odds of vitamin D insufficiency (OR = 3·00; 95 % CI 1·21, 7·45 and OR = 5·02; 95 % CI 1·80, 13·97, respectively). A similar pattern, although not as strong, was shown for vitamin D deficiency with BF% (OR = 1·81; 95 % CI 1·04, 3·16) and BMI (OR = 1·51; 95 % CI 0·85, 2·67). Participants in the lowest BMI and BF% groups also displayed compromised vitamin D status, suggesting a U-shaped association.ConclusionsVitamin D deficiency in adolescence is very prevalent in sunny Cyprus, particularly among females, those with darker skin and those with reduced sun exposure in winter. Furthermore, vitamin D status appears to have a U-shaped association with adiposity measures.

Association of statin use and risk for severe headache or migraine by serum vitamin D status: A cross-sectional population-based study

Cephalalgia ◽  
2014 ◽  
Vol 35 (9) ◽  
pp. 757-766 ◽  
Author(s):  
Catherine Buettner ◽  
Rami Burstein
Keyword(s):  
Vitamin D ◽  
Logistic Regression ◽  
Serum Vitamin ◽  
Severe Headache ◽  
Vitamin D Status ◽  
Cross Sectional ◽  
Serum Vitamin D ◽  
Vitamin D Levels ◽  
Adjusted Logistic Regression ◽  
Statin Use

Objective The objective of this article is to evaluate whether statin use and vitamin D status is associated with severe headache or migraine in a nationally representative sample. Methods We conducted a cross-sectional study of US individuals aged ≥40 years for whom information on statin use, serum 25-hydroxy vitamin D (25(OH)D), and self-reported severe headache or migraine had been collected. We calculated prevalence estimates of headache according to statin and 25(OH)D, and conducted adjusted logistic regression analyses stratified by the median 25(OH)D (≤57 and >57 nmol/l). Results Among 5938 participants, multivariable-adjusted logistic regression showed that statin use was significantly associated with a lower prevalence of severe headache or migraine (OR 0.67; 95% CI 0.46, 0.98, p = 0.04). We found a significant interaction between statin use and 25(OH)D with the prevalence of severe headache or migraine ( p for interaction = 0.005). Among participants who had serum 25(OH)D > 57 nmol/l, statin use was associated with a multivariable-adjusted odds ratio of 0.48 (95% CI 0.32, 0.71, p = 0.001) for having severe headache or migraine. Among those with 25(OH)D ≤ 57 nmol/l, no significant association was observed between statin use and severe headache or migraine. Conclusion Statin use in those with higher serum vitamin D levels is significantly associated with lower odds of having severe headache or migraine.

scholarly journals Effects of Daily Vitamin D Supplementation on Objectively Measured Physical Activity: Results From the STURDY Trial

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 760-760
Author(s):  
Jennifer Schrack ◽  
Jacek Urbanek ◽  
Amal Wanigatunga ◽  
Stephen Juraschek ◽  
Christine Mitchell ◽  
...  
Keyword(s):  
Physical Activity ◽  
Vitamin D ◽  
Vitamin D3 ◽  
Serum Vitamin ◽  
Vitamin D Supplementation ◽  
Cross Sectional ◽  
Physically Active ◽  
Serum Vitamin D ◽  
Daily Vitamin ◽  
Age Related

Abstract Cross-sectional evidence suggests older adults with higher serum vitamin D are more physically active, but whether long-term vitamin D supplementation attenuates age-related declines in physical activity (PA) is undefined. We examined the association between vitamin D supplementation and daily PA in 639 STURDY participants (aged 77 (5.4) years; 44% women) over up to 24-months. Participants were randomized to receive 200 (n=275), 1000 (n=168), 2000 (n=59), or 4000 (n=63) IU/day of vitamin D3. PA was measured using the Actigraph Link wrist-worn accelerometer 24 hours/day for 7-days at baseline, 3, 12, and 24 months. In linear mixed models adjusted for baseline PA level, total daily PA appeared to decline (β=-43.3 counts, p=0.06) annually for all groups and there was no difference by vitamin D3 dose (p for group*time =0.14). These results suggest daily vitamin D supplementation has no effect on quantities of daily PA.

scholarly journals Vitamin D status in full-term exclusively breastfed infants versus full-term breastfed infants receiving vitamin D supplementation in Thailand: a randomized controlled trial

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Chayatat Ruangkit ◽  
Sukrit Suwannachat ◽  
Pornchanok Wantanakorn ◽  
Napapailin Sethaphanich ◽  
Surapat Assawawiroonhakarn ◽  
...  
Keyword(s):  
Vitamin D ◽  
Growth Parameters ◽  
Intervention Group ◽  
Serum Vitamin ◽  
Vitamin D Supplementation ◽  
Full Term ◽  
Control Group ◽  
Vitamin D Status ◽  
Serum Vitamin D ◽  
Breastfed Infants

Abstract Background Many international medical organizations recommend vitamin D supplementation for infants, especially exclusively breastfed infants. In Thailand, however, data regarding the vitamin D status in Thai infants are lacking. Such data would help to support physician decisions and guide medical practice. Methods Full-term, exclusively breastfed infants were randomized into two groups at 2 months of age to continue exclusive breastfeeding either without vitamin D supplementation (control group, n = 44) or with vitamin D3 supplementation at 400 IU/day (intervention group, n = 43) until 6 months of age. At 6 months, the serum vitamin D (25OHD) of the infants and their mothers, serum bone marker, and infants’ growth parameters were compared between the two groups. Results The infants’ serum 25OHD concentration was lower in the control group than intervention group (20.57 ± 12.66 vs. 46.01 ± 16.42 ng/mL, p < 0.01). More infants had vitamin D sufficiency (25OHD of > 20 ng/mL) in the intervention group than control group (93.0% vs. 43.2%, p < 0.01). There were no significant differences in the maternal 25OHD concentrations between the control and intervention groups (25.08 ± 7.75 vs. 23.75 ± 7.64 ng/mL, p = 0.42). Serum calcium, phosphorus, intact parathyroid hormone, alkaline phosphatase, and infants’ growth parameters were comparable between the two groups. After adjustment for the confounding factors, 25OHD concentration in the intervention group was 25.66 ng/mL higher than the control group (95% confidence interval, 19.07–32.25; p < 0.001). Vitamin D supplement contributed to an 88.7% decrease in the prevalence of vitamin D insufficiency/deficiency (relative risk, 0.11; 95% confidence interval, 0.04–0.35; p < 0.01). Conclusions Most full-term, exclusively breastfed Thai infants have serum vitamin D concentration below sufficiency level at 6 months of age. However, vitamin D supplementation (400 IU/day) improves their vitamin D status and prevents vitamin D deficiency. Trial registration The study was pre-registered in the Thai Clinical Trials Registry (TCTR20190622001) on 22/06/2019.

scholarly journals VITAMIN D;

2019 ◽  
Vol 26 (04) ◽  
Author(s):  
Tanveer Hussain Shah ◽  
Tahir Saeed Siddiqui ◽  
Ahmad Zeb
Keyword(s):  
Vitamin D ◽  
Daily Intake ◽  
Serum Vitamin ◽  
Cross Sectional Study ◽  
Age Group ◽  
Vitamin D Status ◽  
School Students ◽  
Cross Sectional ◽  
Serum Vitamin D ◽  
Significant Difference

Background: Present study was designed by keeping in view the importance of vitamin D in adolescents’ age group. Objectives: To explore the cases of low vitamin D status (<50 nmol/l) with respect to age & sex factors in school students. Study Design: Observation cross-sectional study. Setting: Department of Biochemistry faculty of Health Sciences, Hazara University Mansehra, Ayub Medical College and Teaching Hospital Abbottabad. Period: June 2014 to June 2015. Subject & Methods: We recorded daily intake of vitamin D of each individual and  measured serum 25 hydrxoy vitamin D in a school based cross sectional sample of adolescents girls (n=93) and boys (n=96) students. Results: Results of this study reflected that, out of total boys and girls students, 16% and 39% of the sample  respectively showed low serum vitamin D status(<50 nmol/l). Number of cases had low vitamin D level increased with age in girls and decreased with age in boys. Serum vitamin D concentration was decreased with increase in age of girls and found significantly low (p=0.0087) in higher age group (>13-≤16).  No significant difference (p=0.29) was noted regarding daily intake of vitamin D between lower & higher age. Conclusion: It is concluded that, age and sex might be contributory factors in the occurrence of low vitamin D status.

scholarly journals Study of Serum Vitamin D Level in Different Socio-Demographic Population - A Pilot Study

2017 ◽  
Vol 19 (1) ◽  
pp. 22-29 ◽  
Author(s):  
Homayra Tahseen Hossain ◽  
Quazi Tarikul Islam ◽  
Md Abul Kashem Khandaker ◽  
HAM Nazmul Ahasan
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Serum Vitamin ◽  
Adult Patients ◽  
Vitamin D Status ◽  
College Hospital ◽  
Cross Sectional ◽  
Serum Vitamin D ◽  
Vitamin D Levels ◽  
Study Population

Background: Recently, we see in our clinical practice that many patients who are coming with generalized body aches and pains and diagnosed as fibromyalgia or chronic fatigue, not adequately responding to treatment. When their vitamin D level was done, it was found to be low and correction of their low vitamin D level improved their symptoms dramatically. Despite abundant sunshine in Bangladesh, allowing vitamin D synthesis all the year round, why our people are developing hypovitaminosis D inspired us to do this current study. Our present study is designed to estimate the prevalence of vitamin D deficiency among adult patients presented with aches & pains as well as to study the association of low vitamin D levels with different socio-demographic parameters.Methods: A cross sectional observational study was conducted among 212 adult patients aged 18 years and above presented with generalized body aches and pains, attended both outpatient and inpatient departments of Popular Medical College Hospital during the period of March’16- August’16 ( 6 months). Association between vitamin D status & the individual specific variables was statistically analyzed.Results: The prevalence of vitamin D deficiency among the study population was found to be100% in all age groups. Among 212 study population, 73.6% were female (n=156) & 26.4% were male (n=56). Mean Vitamin D level among male was 14.29 (SD 4.68) & among female was 12.64 (SD 4.74). The factors associated with severely deficient Vitamin D level were female sex, urban population, &obesity. It is alarming that 64.2% of our study population were totally unaware about the importance of sun exposure.Conclusions: Vitamin D status was associated with a number of socio-demographic variables. Knowledge of these variables may improve targeted education and public health initiatives.J MEDICINE Jan 2018; 19 (1) : 22-29

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