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Zelzer S, Meinitzer A, Enko D, Markis K, Tournis S, Trifonidi I, Chronopoulos E, Spanou L, Alonso N, Keppel M, Herrmann M. Vitamin D and vitamin K status in postmenopausal women with normal and low bone mineral density. Clin Chem Lab Med 2024; 62:1402-1410. [PMID: 38158723 DOI: 10.1515/cclm-2023-1443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 12/18/2023] [Indexed: 01/03/2024]
Abstract
OBJECTIVES Vitamin D and K are believed to promote bone health, but existing evidence is controversial. This study aimed to measure several metabolites of both vitamins by liquid chromatography tandem mass spectrometry (LC-MS/MS) in a cohort of postmenopausal women with low and normal bone mineral density (BMD). METHODS Vitamin metabolites (25-hydroxyvitamin D (25[OH]D), 24,25-dihydroxyvitamin D (24,25(OH)2D), phylloquinone (K1), menaquinone-4 (MK-4) and MK-7) were measured in 131 serum samples by LC-MS/MS. The vitamin D metabolite ratio (VMR) was calculated. Parathyroid hormone (PTH), type I procollagen-N-terminal-peptide (PINP) and C-terminal telopeptides of type I collagen (CTX-I) were measured by immunoassay. Dual X-ray absorptiometry was performed to identify participants with normal (T-score>-1) and low (T-score<-1) BMD. RESULTS Mean age was 58.2±8.5 years. BMD was normal in 68 and low in 63 women. Median (interquartile range) for 25(OH)D and total vitamin K concentrations were 53.5 (39.6-65.9) nmol/L and 1.33 (0.99-2.39) nmol/L. All vitamin metabolites were comparable in individuals with normal and low BMD. Furthermore, BMD and trabecular bone score were comparable in participants with adequate and inadequate vitamin status (at least one criterion was met: 25(OH)D <50 nmol/L, 24,25(OH)2D <3 nmol/L, VMR <4 %, total vitamin K <0.91 nmol/L). PTH, but not PINP or CTX-I, was inversely correlated with 25(OH)D, 24,25(OH)2D and VMR. Synergistic effects between vitamin D and K were not observed. CONCLUSIONS Vitamin D and K status is not related to BMD and trabecular bone quality in postmenopausal women. Inverse associations were only seen between vitamin D metabolites and PTH.
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Affiliation(s)
- Sieglinde Zelzer
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Andreas Meinitzer
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Dietmar Enko
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Konstantinos Markis
- Clinical Biochemistry Department, KAT General Hospital, Athens, Greece
- Laboratory for Research of the Musculoskeletal System "Th. Garofalidis", Medical School, University of Athens, Athens, Greece
| | - Symeon Tournis
- Laboratory for Research of the Musculoskeletal System "Th. Garofalidis", Medical School, University of Athens, Athens, Greece
| | - Ioulia Trifonidi
- Clinical Biochemistry Department, KAT General Hospital, Athens, Greece
| | - Efstathios Chronopoulos
- Laboratory for Research of the Musculoskeletal System "Th. Garofalidis", Medical School, University of Athens, Athens, Greece
| | - Loukia Spanou
- Endocrinology Department, Athens Red Cross Hospital, Athens Greece
| | - Nerea Alonso
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Martin Keppel
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Markus Herrmann
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
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Bakkar NAALH, Bakr AY, Alhusseini AH, Alourfi ZH. The relationship between serum 25-hydroxy vitamin D status and hypertension in Syrian population: retrospective cohort study. Ann Med Surg (Lond) 2024; 86:3222-3226. [PMID: 38846846 PMCID: PMC11152839 DOI: 10.1097/ms9.0000000000001989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 03/08/2024] [Indexed: 06/09/2024] Open
Abstract
Introduction Vitamin D is a liposoluble steroid hormone that plays a crucial role in the maintenance of bone metabolism and calcium homoeostasis. Many studies on the effects of vitamin D on general health have been significantly increased, driven by new findings concerning the systemic and extraskeletal effects of this hormone. This study was performed to determine whether low levels of vitamin D were associated with hypertension in Syrian people. Materials and methods This retrospective cohort study consisted of 207 subjects, including 83 (40.1%) patients suffering from essential hypertension and 124 (59.9%) patients with normal blood pressure. Aged older than 18 years, who was referred to the endocrinology clinic from September 2022 to September 2023. The data were analysed by using SPSS (version 25). Logistic regression analyses were performed with adjustments for age, sex, and waist circumference. Results Hypertension rates were 73%, 20%, and 5% in 25-hydroxyvitamin D groups less than 12 ng/ml, 12-20 ng/mL, and greater than or equal to 20 ng/ml, respectively. Odds ratios (95% CIs) for hypertension adjusting for age, sex, and waist circumference were 178.6 (30.5_1045.6), 5.13 (0.9_26.5) for 25-hydroxyvitamin D levels less than 12 ng/ml, and 12-20 ng/ml, respectively, compared with the greater than or equal to 20 ng/ml group. Conclusions This study has shown a high prevalence of low vitamin D levels (25OHVD/20 ng/ml) among a sample of Syrian people (78.3%). The lowest 25OHVD group was associated with a higher prevalence of hypertension, which refers to an adverse association between vitamin D level and essential hypertension. Further research is needed to confirm this relationship.
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Okada M, Sato T, Hasegawa Y, Futamura K, Hiramitsu T, Ichimori T, Goto N, Narumi S, Takeda A, Watarai Y. Persistent hyperparathyroidism after preemptive kidney transplantation. Clin Exp Nephrol 2023; 27:882-889. [PMID: 37351681 PMCID: PMC10504143 DOI: 10.1007/s10157-023-02371-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 06/11/2023] [Indexed: 06/24/2023]
Abstract
BACKGROUND Long-term dialysis vintage is a predictor of persistent hyperparathyroidism (HPT) after kidney transplantation (KTx). Recently, preemptive kidney transplantation (PKT) has increased. However, the incidence, predictors, and clinical implications of HPT after PKT are unclear. Here, we aimed to elucidate these considerations. METHODS In this retrospective cohort study, we enrolled patients who underwent PKT between 2000 and 2016. Those who lost their graft within 1 year posttransplant were excluded. HPT was defined as an intact parathyroid hormone (PTH) level exceeding 80 pg/mL or hypercalcemia unexplained by causes other than HPT. Patients were divided into two groups based on the presence of HPT 1 year after PKT. The primary outcome was the predictors of HPT after PKT, and the secondary outcome was graft survival. RESULTS Among the 340 consecutive patients who underwent PKT, 188 did not have HPT (HPT-free group) and 152 had HPT (HPT group). Multivariate logistic regression analysis revealed that pretransplant PTH level (P < 0.001; odds ratio [OR], 5.480; 95% confidence interval [CI], 2.070-14.50) and preoperative donor-estimated glomerular filtration rate (P = 0.033; OR, 0.978; 95% CI, 0.957-0.998) were independent predictors of HPT after PKT. Death-censored graft survival was significantly lower in the HPT group than that in the HPT-free group (90.4% vs. 96.4% at 10 years, P = 0.009). CONCLUSIONS Pretransplant PTH levels and donor kidney function were independent predictors of HPT after PKT. In addition, HPT was associated with worse graft outcomes even after PKT.
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Affiliation(s)
- Manabu Okada
- Department of Transplant Surgery and Transplant Nephrology, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, 2-9 Myoken-cho, Showa-ku, Nagoya, Aichi, 4668650, Japan.
| | - Tetsuhiko Sato
- Department of Diabetes and Endocrinology, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, Showa-ku, Nagoya, Aichi, Japan
| | - Yuki Hasegawa
- Department of Transplant Surgery and Transplant Nephrology, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, 2-9 Myoken-cho, Showa-ku, Nagoya, Aichi, 4668650, Japan
| | - Kenta Futamura
- Department of Transplant Surgery and Transplant Nephrology, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, 2-9 Myoken-cho, Showa-ku, Nagoya, Aichi, 4668650, Japan
| | - Takahisa Hiramitsu
- Department of Transplant Surgery and Transplant Nephrology, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, 2-9 Myoken-cho, Showa-ku, Nagoya, Aichi, 4668650, Japan
| | - Toshihiro Ichimori
- Department of Transplant Surgery and Transplant Nephrology, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, 2-9 Myoken-cho, Showa-ku, Nagoya, Aichi, 4668650, Japan
| | - Norihiko Goto
- Department of Transplant Surgery and Transplant Nephrology, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, 2-9 Myoken-cho, Showa-ku, Nagoya, Aichi, 4668650, Japan
| | - Shunji Narumi
- Department of Transplant Surgery and Transplant Nephrology, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, 2-9 Myoken-cho, Showa-ku, Nagoya, Aichi, 4668650, Japan
| | - Asami Takeda
- Department of Nephrology, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, Showa-ku, Nagoya, Aichi, Japan
| | - Yoshihiko Watarai
- Department of Transplant Surgery and Transplant Nephrology, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, 2-9 Myoken-cho, Showa-ku, Nagoya, Aichi, 4668650, Japan
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Nutritional and health status of adult Syrian refugees in the early years of asylum in Germany: a cross-sectional pilot study. BMC Public Health 2022; 22:2217. [PMID: 36447164 PMCID: PMC9706931 DOI: 10.1186/s12889-022-14684-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 11/21/2022] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Migration is usually accompanied by changes in the social, cultural, and religious environment, socioeconomic status, and housing conditions, all of which affect nutritional health. In a cross-sectional study, we assessed the dietary intake as well as nutritional and health situation in a population of Syrian refugees who have resided in Germany for at least six months up to four years since 2015. The primary aim of this pilot study was to evaluate the nutritional and health status in comparison to reference values. METHODS Between December 2018 and March 2020, 114 adult Syrian refugees were included in the study. The subjects filled out questionnaires on sociodemographic variables, exercise, and nutrition behavior (three-day nutrition record). After a fasting blood draw, the subjects were examined for anthropometric parameters (height, weight, body mass index, waist circumference, waist-hip ratio, and body composition via a bioelectrical impedance analyzer). Various blood markers including iron status, hematological parameters, Vitamin D status, lipid metabolism, glucose metabolism, and total homocysteine (tHcy) were measured. RESULTS About half of the participants (71 male, 43 female) had lived in Germany for less than three years. Over 60% of men and 30% of women were overweight (BMI 25-30 kg/m2) or obese (BMI > 30 kg/m2), while 79% of men and 74% of women observed an elevated body fat mass. The evaluation of the three-day nutrition records revealed an unfavorable supply situation for numerous critical nutrients. More than half of the women (53.5%) had depleted iron stores (serum ferritin < 15 µg/l). The 25-OH-Vitamin D blood levels showed a high prevalence of Vitamin D insufficiency (25-49.9 nmol/l: 38% of men and 21% of women) and deficiency (< 25 nmol/l: 44% of men and 70% of women). 83% of men and 67% of women showed tHcy levels in plasma > 10 nmol/l. Fasting insulin levels and the HOMA-IR index indicate a risk for insulin resistance. Hyperlipidemia was prevalent, especially in males with 24% showing hypertriglyceridemia (> 150 mg/dl) and LDL-hypercholesterolemia (> 130 mg/dl). CONCLUSIONS The nutritional and health status of the cohort of Syrian refugees in Germany examined in this study is unsatisfactory, and many of the investigated refugees are at risk for developing cardiovascular disease and type 2 diabetes mellitus. Further studies are required to investigate the nutritional and health situation of refugees. This is obligatory to find ways to avoid malnutrition with all its associated health, sociodemographic, and economic consequences.
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Almatni S, Alsultan M, Anan MT, Alourfi Z. The correlation of 25-hydroxyvitamin D with BMI and lipid profile: A retrospective cohort study of Syrian patients. Ann Med Surg (Lond) 2022; 76:103457. [PMID: 35308427 PMCID: PMC8927792 DOI: 10.1016/j.amsu.2022.103457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 02/26/2022] [Accepted: 02/28/2022] [Indexed: 11/16/2022] Open
Abstract
Background This study aims to identify the prevalence of 25OHD deficiency in Syrian patients and investigate the relationship with obesity and lipid profile. Methods A retrospective cohort study consisted of 201 patients of age >10 years, who referred to Al Assad and Al Mouwasat University Hospitals, Damascus, Syria from Oct/2020 to Oct/2021. The data was analyzed by using linear regressions and produced a matrix of correlations with significant equations between study variables. Results Firstly, participants were divided depending on 25OHD levels, where 92.5% of patients had 25OHD <30 ng/mL. Inverse correlation between 25OHD and BMI (P ≤ 0.001) was observed, where severe 25OHD deficiency group had higher BMI (27.40 ± 7.22 kg/m2) and higher levels of Chol (211 ± 67.12 mg/dl) than in sufficiency group.Secondly, participants were divided depending on BMI. Higher BMI associated with lower levels of 25OHD. Moreover, we derived that every increase in 25OHD by 1 ng/mL results in decrease of BMI by 0.26 kg/m2 (P ≤ 0.001) and results in decrease of Chol by 1.54 mg/dl (P ≤ 0.004). Conclusion A high prevalence of 25OHD deficiency was observed in this sample of Syrian patients. There is an inverse correlation between 25OHD and BMI regardless of age and gender. Moreover, the equation, that derived between 25OHD and BMI, represents a beneficial and an inexpensive tool in clinical practice to minimize testing of 25OHD by predicting its deficiency based on BMI and supports the impact of 25OHD supplementation for reduce BMI.
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Affiliation(s)
- Sally Almatni
- Department of Endocrinology, Damascus University- Faculty of Medicine, Damascus, Syria
| | - Mohammad Alsultan
- Department of Nephrology, Damascus University- Faculty of Medicine, Damascus, Syria
| | - Mohamed Taher Anan
- Department of Statics, Aleppo University- Faculty of Sciences, Aleppo, Syria
| | - Zaynab Alourfi
- Department of Endocrinology, Damascus University- Faculty of Medicine, Damascus, Syria
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Siddiqee MH, Bhattacharjee B, Siddiqi UR, MeshbahurRahman M. High prevalence of vitamin D deficiency among the South Asian adults: a systematic review and meta-analysis. BMC Public Health 2021; 21:1823. [PMID: 34627207 PMCID: PMC8501935 DOI: 10.1186/s12889-021-11888-1] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 09/20/2021] [Indexed: 11/15/2022] Open
Abstract
Background Vitamin-D deficiency is linked to a wide range of chronic and infectious diseases. Body of literature suggested that the prevalence of this deficiency can have geographical variation. Although vitamin D deficiency is frequently reported in the South Asian population, the scarcity of systematic reviews and meta-analysis means the true extent of the disease and the underlying factors causing it are poorly characterized. Methods A systematic search was performed using two databases (PubMed and Scopus) and one search engine (Google Scholar) for original studies on the South Asian population (published from January 1, 2001, to December 31, 2019). Following the search, a random effect meta-analysis was performed to calculate population-level weighted average, the pooled prevalence of deficiency, and heterogeneity of vitamin D among different countries and genders; in addition to South Asia as a whole. Results Our study, based on our selection criteria was narrowed down to a total of 44,717 participants; which spanned over 65 studies from five South Asian countries. Overall, the pooled prevalence of deficiency was 68% [95% CI: 64 to 72%] with significant heterogeneity (I2 = 98%; p = 0.00). The average level of vitamin D ranged from 4.7 to 32 ng/mL, with a weighted mean of 19.15 ng/mL (weighted standard deviation 11.59 ng/mL). The highest prevalence of vitamin D deficiency was found in Pakistan (73%;95% CI: 63 to 83%) followed by Bangladesh (67%; 95% CI: 50 to 83%), India (67%; 95% CI: 61 to 73%), Nepal (57%; 95% CI: 53 to 60%) and Sri Lanka (48%; 95% CI: 41 to 55%), respectively. This finding indicated a high degree of heterogeneity among the population. (I2 = 98.76%), Furthermore, a gender-wise analysis suggested that in South Asia, the prevalence of vitamin D deficiency was higher in females than males. Conclusion Our findings reveal highly prevalent and variable vitamin D deficiency among the adults of different South Asian countries. Findings from this review would be helpful to generate hypotheses and explore the factors affecting the inter-country variability, alongside strengthening evidence for governments to prioritize mitigation strategies in this region. Supplementary Information The online version contains supplementary material available at 10.1186/s12889-021-11888-1.
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Affiliation(s)
- Mahbubul H Siddiqee
- School of Data and Sciences, BRAC University, Dhaka, 1212, Bangladesh. .,Research and Development Wing, Red and White Innovations, Dhaka, 1216, Bangladesh.
| | - Badhan Bhattacharjee
- School of Data and Sciences, BRAC University, Dhaka, 1212, Bangladesh.,Research and Development Wing, Red and White Innovations, Dhaka, 1216, Bangladesh
| | - Umme Ruman Siddiqi
- Communicable Disease Control Unit, Directorate General of Health Services, Dhaka, 1212, Bangladesh
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Dalamaga M, Muscogiuri G, Paganitsa G, Parvouleskou G, Syriou V, Karagkoynis P, Stratigou T, Vallianou N, Christodoulatos GS, Karampela I, Daskalopoulou K. Adherence to the Mediterranean diet is an independent predictor of circulating vitamin D levels in normal weight and non-smoker adults: an observational cross-sectional study. Int J Food Sci Nutr 2021; 72:848-860. [PMID: 33509003 DOI: 10.1080/09637486.2021.1878488] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We explored the association between circulating 25OHD and adherence to the Mediterranean Diet (MedDiet) in 402 Greek (21-65 years, 188 men and 214 women), normal weight, non-smoker, healthy volunteers in the Athens metropolitan area during summer and autumn, taking into account skin phototype, anthropometric, and lifestyle variables. Circulating 25OHD, parathormone, creatinine, calcium, and phosphate were determined. A vitamin D status of ≤25, ≤50, and ≤75 nmol/L was observed in 4.5, 37.3, and 74.1% of the subjects, respectively. The independent predictors of 25OHD deficiency were autumn, darker skin phototype, BMI, or waist circumference (WC), sunscreen use, less physical outdoor activity, and less adherence to the MedDiet. Higher intake of fish and olive oil was a positive independent predictor of elevated circulating 25OHD levels. In conclusion, higher adherence to the MedDiet, fish and olive oil consumption, were positively associated with circulating 25OHD independently from BMI or WC, skin phototype, season, and physical activity.
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Affiliation(s)
- Maria Dalamaga
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Giovanna Muscogiuri
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università "Federico II" di Napoli, Naples, Italy
| | - Georgia Paganitsa
- Laboratory of Biochemistry and Microbiology, 'ELPIS' General Hospital, Athens, Greece
| | - Georgeta Parvouleskou
- Laboratory of Biochemistry and Microbiology, 'ELPIS' General Hospital, Athens, Greece
| | - Vassiliki Syriou
- Laboratory of Biochemistry and Microbiology, 'ELPIS' General Hospital, Athens, Greece
| | | | - Theodora Stratigou
- Department of Endocrinology, 'Evangelismos' General Hospital of Athens, Athens, Greece
| | - Natalia Vallianou
- Department of Endocrinology, 'Evangelismos' General Hospital of Athens, Athens, Greece
| | | | - Irene Karampela
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, Athens, Greece
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Arabi A, Chamoun N, Nasrallah MP, Tamim HM. Vitamin D Deficiency in Lebanese Adults: Prevalence and Predictors from a Cross-Sectional Community-Based Study. Int J Endocrinol 2021; 2021:3170129. [PMID: 34462634 PMCID: PMC8403038 DOI: 10.1155/2021/3170129] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 07/19/2021] [Accepted: 08/13/2021] [Indexed: 01/03/2023] Open
Abstract
METHODS A random sample of Lebanese adults residing in the Greater Beirut area was selected based on area probability and multistage cluster sampling. Data from 446 participants (68% females) with mean age 45.3 ± 15 years were used for the analyses. Participants were recruited between March and May. Serum 25-hydroxyvitamin D levels were measured using electrochemiluminescent immunoassay. RESULTS Vitamin D deficiency was highly prevalent whether using the cutoff of 50 nmol/L or using the more conservative cutoff of 30 nmol/L; more specifically, 71.9% and 39.1% of the study population were deficient using the above cutoffs, respectively In the bivariate analyses, gender, BMI and body fat mass, socioeconomic factors (income and education level), alcohol consumption, dietary intake of fat and of vitamin D, serum LDL-cholesterol, and serum creatinine were all associated with vitamin D status. After adjustment for multiple covariates, age, income, alcohol consumption, and serum creatinine were independent predictors of vitamin D deficiency. CONCLUSION Vitamin D deficiency is highly prevalent in Lebanon. Preventive measures should target the modifiable risk factors.
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Affiliation(s)
- Asma Arabi
- Department of Internal Medicine, Division of Endocrinology and Metabolism, American University of Beirut, Beirut, Lebanon
| | - Nariman Chamoun
- Department of Internal Medicine, Division of Endocrinology and Metabolism, American University of Beirut, Beirut, Lebanon
| | - Mona P. Nasrallah
- Department of Internal Medicine, Division of Endocrinology and Metabolism, American University of Beirut, Beirut, Lebanon
| | - Hani M. Tamim
- Department of Internal Medicine, Biostatistics Unit, Clinical Research Institute, American University of Beirut, Beirut, Lebanon
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Segheto KJ, Pereira M, Silva DCGD, Carvalho CJD, Massardi FR, Kakehasi AM, Juvanhol LL, Longo GZ. Vitamin D and bone health in adults: a systematic review and meta-analysis. CIENCIA & SAUDE COLETIVA 2020; 26:3221-3244. [PMID: 34378711 DOI: 10.1590/1413-81232021268.15012020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 05/26/2020] [Indexed: 11/22/2022] Open
Abstract
Low bone health is associated with vitamin D deficiency in older individuals; however, this association is not well established in adults. The aim of the study was to analyze the association between serum concentrations of 25-hydroxyvitamin D and bone health in adults by systematic review and meta-analysis. The search was carried out in the LILACS, PubMed, Scopus, Web of Science, ScienceDirect databases from March 2017 to October 2018 with adult individuals (20-59 years). Bone health was evaluation performed through dual X-ray absorptiometry and serum concentrations of 25(OH)D. The random effect model was used to analyze data from bone mineral content and bone mineral. Random effects models were used and the sources of heterogeneity were explored by means of meta-regression. Thirty-five articles were selected. There was positive correlation between vitamin D and bone health in most of the evaluated sites. Correlation was observed in the analysis of subgroups for lumbar spine among men. When stratified, the studies presented high heterogeneity, which was explained by the sample size, mean serum vitamin D levels and risk of bias. Vitamin D is positively correlated to bone health in adult individuals.
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Affiliation(s)
- Kátia Josiany Segheto
- Departamento de Nutrição e Saúde, Universidade Federal de Viçosa (UFV). Ed. Centro de Ciências Biológicas II s/n, Campus Universitário. 36570-900 Viçosa MG Brasil.
| | - Marcos Pereira
- Instituto de Saúde Coletiva, Universidade Federal da Bahia. Salvador BA Brasil
| | | | | | | | | | - Leidjaira Lopes Juvanhol
- Departamento de Nutrição e Saúde, Universidade Federal de Viçosa (UFV). Ed. Centro de Ciências Biológicas II s/n, Campus Universitário. 36570-900 Viçosa MG Brasil.
| | - Giana Zarbato Longo
- Departamento de Nutrição, Universidade Federal de Santa Catarina. Florianópolis SC Brasil
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El-Khateeb M, Khader Y, Batieha A, Jaddou H, Hyassat D, Khawaja N, Abujbara M, Ajlouni K. Vitamin D deficiency and associated factors in Jordan. SAGE Open Med 2019; 7:2050312119876151. [PMID: 35154754 PMCID: PMC8826271 DOI: 10.1177/2050312119876151] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Accepted: 08/22/2019] [Indexed: 02/06/2023] Open
Abstract
Background: In Jordan, many studies reported various rates of vitamin D deficiency and insufficiency among different groups. This study aimed to determine the prevalence of low vitamin D level among Jordanian adults and determine its association with selected variables. Methods: The vitamin D level was assessed in a national representative sample of 4056 subjects aged >17 years. The study involved face-to-face interviews with the subjects and measurement of serum 25(OH)D. Low vitamin D level was defined as 25(OH)D < 30 ng/mL. Deficiency was defined as 25(OH)D < 20 ng/mL, and insufficiency was defined as 25(OH)D level of 20–30 ng/mL. Results: The overall prevalence of low vitamin D status (25(OH)D < 30 ng/mL) was 89.7%, with higher prevalence in males (92.4%) than in females (88.6%). Vitamin D was sufficient in 7.6% of males, insufficient in 38.4% of males, and deficient in 54% of males. Among females, vitamin D was insufficient in 10.1% and deficient in 78.5%. The prevalence of vitamin D deficiency was much higher in females than in males (p = 0.001). The only variables that were significantly associated with low level of vitamin D were gender, age, obesity, and employment. Conclusion: The prevalence of low vitamin D level is extremely high in Jordan. Age, gender, obesity, and unemployment were associated with low levels of vitamin D. Health authorities in Jordan need to increase the level of awareness about vitamin D deficiency and its prevention, particularly among women.
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Affiliation(s)
- Mohammed El-Khateeb
- The National Center (Institute) for Diabetes, Endocrinology and Genetics (NCDEG), The University of Jordan, Amman, Jordan
| | - Yousef Khader
- Jordan University for Science and Technology, Irbid, Jordan
| | - Anwer Batieha
- Jordan University for Science and Technology, Irbid, Jordan
| | - Hashem Jaddou
- Jordan University for Science and Technology, Irbid, Jordan
| | - Dana Hyassat
- The National Center (Institute) for Diabetes, Endocrinology and Genetics (NCDEG), The University of Jordan, Amman, Jordan
| | - Nahla Khawaja
- The National Center (Institute) for Diabetes, Endocrinology and Genetics (NCDEG), The University of Jordan, Amman, Jordan
| | - Mousa Abujbara
- The National Center (Institute) for Diabetes, Endocrinology and Genetics (NCDEG), The University of Jordan, Amman, Jordan
| | - Kamel Ajlouni
- The National Center (Institute) for Diabetes, Endocrinology and Genetics (NCDEG), The University of Jordan, Amman, Jordan
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Grant WB, Fakhoury HMA, Karras SN, Al Anouti F, Bhattoa HP. Variations in 25-Hydroxyvitamin D in Countries from the Middle East and Europe: The Roles of UVB Exposure and Diet. Nutrients 2019; 11:E2065. [PMID: 31484329 PMCID: PMC6769941 DOI: 10.3390/nu11092065] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 08/09/2019] [Accepted: 08/19/2019] [Indexed: 12/20/2022] Open
Abstract
Serum 25-hydroxyvitamin D (25(OH)D) has been largely associated with latitude and sunshine exposure across several regions. According to previous results, 25(OH)D concentrations are, on average, relatively low in countries with abundant sunshine, including those of the Middle East and North Africa region, as well as lower-latitude Europe. The standard explanation for this phenomenon is that people wear concealing clothing because of cultural and religious practices and that high temperatures in summer limit direct sun exposure. However, the role of diet in the development of profound hypovitaminosis D has not been adequately explored in those countries. To examine how diet affects vitamin D status in the Middle Eastern and European countries, a search was conducted for papers from that region reporting 25(OH)D concentrations. Papers were sought that reported summertime and wintertime 25(OH)D concentrations for healthy nonpregnant adults representative of the entire population. Data from 15 Middle Eastern and European countries were found through this search. Data for postmenopausal women from 19 European countries were also obtained. Dietary supply data for animal products containing vitamin D (animal fat, eggs, ocean fish, animal meat, and milk) were obtained from the Food and Agriculture Organization of the United Nations. Latitude and a solar UVB dose index also were obtained for each country. For the 15-country study, energy from dietary factors was highly correlated with latitude, making it difficult to separate the effects of UVB exposure and dietary factors. However, for the 19-country study, dietary factors were only weakly correlated with latitude. In that study, ocean fish was the most important single dietary factor affecting serum 25(OH)D concentration for postmenopausal women in various European countries, but animal fat and meat also contributed. Because this is an ecological study, further research is encouraged to evaluate and extend the findings.
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Affiliation(s)
- William B Grant
- Director, Sunlight, Nutrition, and Health Research Center, P.O. Box 641603, San Francisco, CA 94164-1603, USA.
| | - Hana M A Fakhoury
- Department of Biochemistry and Molecular Medicine, College of Medicine, Alfaisal University, P.O. Box 50927, Riyadh 11533, Saudi Arabia
| | - Spyridon N Karras
- Division of Endocrinology and Metabolism and Diabetes Center, First Department of Internal Medicine, Medical School, Aristotle University of Thessaloniki, AHEPA University Hospital, 55535 Thessaloniki, Greece
| | - Fatme Al Anouti
- College of Natural and Health Sciences, Department of Public Health and Nutrition, Zayed University, P.O. Box 4783, Abu Dhabi 144534, UAE
| | - Harjit P Bhattoa
- Endocrinology Unit and Andrology and Cryopreservation Unit, Department of Laboratory Medicine, Faculty of Medicine University of Debrecen Nagyerdei krt. 98, H-4032 Debrecen, Hungary
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Lips P, Cashman KD, Lamberg-Allardt C, Bischoff-Ferrari HA, Obermayer-Pietsch B, Bianchi ML, Stepan J, El-Hajj Fuleihan G, Bouillon R. Current vitamin D status in European and Middle East countries and strategies to prevent vitamin D deficiency: a position statement of the European Calcified Tissue Society. Eur J Endocrinol 2019; 180:P23-P54. [PMID: 30721133 DOI: 10.1530/eje-18-0736] [Citation(s) in RCA: 369] [Impact Index Per Article: 73.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 01/31/2019] [Indexed: 12/11/2022]
Abstract
Vitamin D deficiency (serum 25-hydroxyvitamin D (25(OH)D) <50 nmol/L or 20 ng/mL) is common in Europe and the Middle East. It occurs in <20% of the population in Northern Europe, in 30-60% in Western, Southern and Eastern Europe and up to 80% in Middle East countries. Severe deficiency (serum 25(OH)D <30 nmol/L or 12 ng/mL) is found in >10% of Europeans. The European Calcified Tissue Society (ECTS) advises that the measurement of serum 25(OH)D be standardized, for example, by the Vitamin D Standardization Program. Risk groups include young children, adolescents, pregnant women, older people (especially the institutionalized) and non-Western immigrants. Consequences of vitamin D deficiency include mineralization defects and lower bone mineral density causing fractures. Extra-skeletal consequences may be muscle weakness, falls and acute respiratory infection, and are the subject of large ongoing clinical trials. The ECTS advises to improve vitamin D status by food fortification and the use of vitamin D supplements in risk groups. Fortification of foods by adding vitamin D to dairy products, bread and cereals can improve the vitamin D status of the whole population, but quality assurance monitoring is needed to prevent intoxication. Specific risk groups such as infants and children up to 3 years, pregnant women, older persons and non-Western immigrants should routinely receive vitamin D supplements. Future research should include genetic studies to better define individual vulnerability for vitamin D deficiency, and Mendelian randomization studies to address the effect of vitamin D deficiency on long-term non-skeletal outcomes such as cancer.
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Affiliation(s)
- Paul Lips
- Endocrine Section, Department of Internal Medicine, Amsterdam University Medical Center, VUMC, Amsterdam, The Netherlands
| | - Kevin D Cashman
- Cork Centre for Vitamin D and Nutrition Research, School of Food and Nutritional Sciences, Department of Medicine, University College Cork, Cork, Ireland
| | - Christel Lamberg-Allardt
- Calcium Research Unit, Department of Food and Nutritional Sciences, University of Helsinki, Helsinki, Finland
| | | | - Barbara Obermayer-Pietsch
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University Graz, Graz, Austria
| | | | - Jan Stepan
- Institute of Rheumatology, Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Ghada El-Hajj Fuleihan
- Calcium Metabolism and Osteoporosis Program, WHO Collaborating Center for Metabolic Bone Disorders, American University of Beirut Medical Center, Beirut, Lebanon
| | - Roger Bouillon
- Clinic and Laboratory of Endocrinology, Gasthuisberg, KU Leuven, Leuven, Belgium
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13
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Rejinold NS, Kim HK, Isakovic AF, Gater DL, Kim YC. Therapeutic vitamin delivery: Chemical and physical methods with future directions. J Control Release 2019; 298:83-98. [DOI: 10.1016/j.jconrel.2019.01.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 01/25/2019] [Accepted: 01/28/2019] [Indexed: 12/31/2022]
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Chakhtoura M, Rahme M, Chamoun N, El-Hajj Fuleihan G. Vitamin D in the Middle East and North Africa. Bone Rep 2018; 8:135-146. [PMID: 29955632 PMCID: PMC6020111 DOI: 10.1016/j.bonr.2018.03.004] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 03/12/2018] [Accepted: 03/15/2018] [Indexed: 12/31/2022] Open
Abstract
PURPOSE The Middle East and North Africa (MENA) region registers some of the lowest serum 25‑hydroxyvitamin D [25(OH)D] concentrations, worldwide. We describe the prevalence and the risk factors for hypovitaminosis D, completed and ongoing clinical trials, and available guidelines for vitamin D supplementation in this region. METHODS This review is an update of previous reviews published by our group in 2013 for observational studies, and in 2015 for randomized controlled trials (RCTs) from the region. We conducted a comprehensive search in Medline, PubMed, and Embase, and the Cochrane Library, using MeSH terms and keywords relevant to vitamin D, vitamin D deficiency, and the MENA region, for the period 2012-2017 for observational studies, and 2015-2017 for RCTs. We included large cross-sectional studies with at least 100 subjects/study, and RCTs with at least 50 participants per arm. RESULTS We identified 41 observational studies. The prevalence of hypovitaminosis D, defined as a 25‑hydroxyvitamin D [25(OH)D] level below the desirable level of 20 ng/ml, ranged between 12-96% in children and adolescents, and 54-90% in pregnant women. In adults, it ranged between 44 and 96%, and the mean 25(OH)D varied between 11 and 20 ng/ml. In general, significant predictors of low 25(OH)D levels were female gender, increasing age and body mass index, veiling, winter season, use of sun screens, lower socioeconomic status, and higher latitude.We retrieved 14 RCTs comparing supplementation to control or placebo, published during the period 2015-2017: 2 in children, 8 in adults, and 4 in pregnant women. In children and adolescents, a vitamin D dose of 1000-2000 IU/d was needed to maintain serum 25(OH)D level at target. In adults and pregnant women, the increment in 25(OH)D level was inversely proportional to the dose, ranging between 0.9 and 3 ng/ml per 100 IU/d for doses ≤2000 IU/d, and between 0.1 and 0.6 ng/ml per 100 IU/d for doses ≥3000 IU/d. While the effect of vitamin D supplementation on glycemic indices is still controversial in adults, vitamin D supplementation may be protective against gestational diabetes mellitus in pregnant women. In the only identified study in the elderly, there was no significant difference between 600 IU/day and 3750 IU/day doses on bone mineral density. We did not identify any fracture studies.The available vitamin D guidelines in the region are based on expert opinion, with recommended doses between 400 and 2000 IU/d, depending on the age category, and country. CONCLUSION Hypovitaminosis D is prevalent in the MENA region, and doses of 1000-2000 IU/d may be necessary to reach a desirable 25(OH)D level of 20 ng/ml. Studies assessing the effect of such doses of vitamin D on major outcomes, and confirming their long term safety, are needed.
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Key Words
- 25(OH)D, 25‑hydroxyvitamin D
- ALKP, alkaline phosphatase
- BMC, bone mineral content
- BMD, bone mineral density
- BMI, body mass index
- CARS, Childhood Autism Rating Scale
- CDC, Centers for Disease Control
- Ca, Calcium
- DEQAS, Vitamin D External Quality Assessment Scheme
- DXA, dual-energy X-ray absorptiometry
- ESCEO, European Society for Clinical and Economic Aspects of Osteoporosis and Osteoarthritis
- GDM, Gestational Diabetes Mellitus
- HOMA-IR, homeostatic model assessment of insulin resistance
- HbA1c, glycated hemoglobin
- Hypovitaminosis D
- ID LC-MS/MS, isotope dilution liquid chromatography - tandem mass spectrometry
- IOM, Institute of Medicine
- KSA, Kingdom of Saudi Arabia
- LCMS/MS, liquid chromatography-tandem mass spectrometry
- MENA, Middle East North Africa
- Middle East and North Africa
- OSTEOS, Lebanese Society for Osteoporosis and Metabolic Bone Disorders
- PO4, phosphorus
- PTH, parathyroid hormone
- Predictors
- RCT, randomized controlled trials
- ROB, risk of bias
- RR, relative risk
- SDp, pooled standard deviation
- T2D, type 2 diabetes
- UAE, United Arab Emirates
- UVB, ultraviolet B
- VDDR2, vitamin d dependent rickets type 2
- VDR, vitamin d receptor
- VDSP, Vitamin D Standardization Program
- Vitamin D assays
- Vitamin D guidelines
- WM, weighted mean
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Affiliation(s)
- Marlene Chakhtoura
- Calcium Metabolism and Osteoporosis Program, WHO Collaborating Center for Metabolic Bone Disorders, American University of Beirut Medical Center, Beirut, P.O. Box: 113-6044/C8, Lebanon
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Is vitamin D deficiency a public health concern for low middle income countries? A systematic literature review. Eur J Nutr 2018; 58:433-453. [PMID: 29344677 DOI: 10.1007/s00394-018-1607-3] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 01/03/2018] [Indexed: 12/18/2022]
Abstract
PURPOSE Vitamin D deficiency has been receiving increasing attention as a potential public health concern in low and lower-middle income countries (LMICs), of which there are currently 83. We aimed to conduct a comprehensive systematic literature review (SLR) of available data on vitamin D status and prevalence of vitamin D deficiency in all 83 LMICs. METHODS We followed the general methodology for SLRs in the area of serum 25-hydroxyvitamin D. Highest priority was placed on identifying relevant population-based studies, followed by cross-sectional studies, and to a lesser extent case-control studies. We adopted the public health convention that a prevalence of vitamin D deficiency (serum 25-hydroxyvitamin D < 25/30 nmol/L) at > 20% in the entire population and/or at-risk population subgroups (infants, children, women of child-bearing age, pregnancy) constitutes a public health issue that may warrant intervention. RESULTS Our SLR revealed that of the 83 LMICs, 65% (n = 54 countries) had no published studies with vitamin D data suitable for inclusion. Using data from the remaining third, a number of LMICs had evidence of excess burden of vitamin D deficiency in one or more population subgroup(s) using the above convention (Afghanistan, Pakistan, India, Tunisia and Mongolia) as well as possibly other LMICs, albeit with much more limited data. Several LMICs had no evidence of excess burden. CONCLUSION Vitamin D deficiency is a public health issue in some, but certainly not all, LMICs. There is a clear need for targeting public health strategies for prevention of vitamin D deficiency in those LMICs with excess burden.
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Oussedik-Lehtihet S, Haouichat C, Hammoumraoui N, Ducros E, Gouhier-Kodas C, Lancrenon S, Djoudi H. Hypovitaminosis D and Its Associated Factors in North Algerian Postmenopausal Women: Results of a Cross-Sectional Study. J Nutr Metab 2017; 2017:9032141. [PMID: 29391950 PMCID: PMC5748113 DOI: 10.1155/2017/9032141] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 10/06/2017] [Accepted: 10/29/2017] [Indexed: 01/21/2023] Open
Abstract
PURPOSE As the vitamin D status of Algerian postmenopausal women was poorly described, this cross-sectional study investigated the prevalence of low vitamin D status in a sample population. Secondarily, predictive factors of this hypovitaminosis D were explored. METHODS All the 336 selected women ≥ 45 years from Douera were interviewed to get anthropometric and lifestyle data, reproductive and medical history, medications, and calcium/vitamin D intakes. A blood sample was collected to measure 25-hydroxyvitamin D (25(OH)D) concentrations. RESULTS Approximately 86% of subjects had low vitamin D status (<20 ng/mL). Mean 25(OH)D level was 14.4 ± 5.3 ng/mL with a clear seasonal dynamic and a significant negative correlation with PTH levels (r = -0.15, p=0.006). A multiple regression analysis using the 25(OH)D cutoff value of 17 ng/mL instead of the generally admitted level of 20 ng/mL was performed to increase statistical power. Other seasons than summer (OR 4.159 and 95% CI 2.456-7.043), obesity (≥30 kg/m2, OR 1.826, 95% CI 1.081-3.083), and veiling (OR 3.526, 95% CI 1.090-11.400) were significantly associated with 25(OH)D concentrations <17 ng/mL. CONCLUSIONS In North Algeria, the abundant sunlight appears insufficient to fully offset hypovitaminosis D risk factors in postmenopausal women, especially obesity and veiling. It suggests the major need to increase vitamin D supplementation in this subpopulation.
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Affiliation(s)
- S. Oussedik-Lehtihet
- Centre Hospitalier Universitaire de Douera, Rue des Frères Halim, Douera 16000, Alger, Algeria
| | - C. Haouichat
- Centre Hospitalier Universitaire de Douera, Rue des Frères Halim, Douera 16000, Alger, Algeria
| | - N. Hammoumraoui
- Centre Hospitalier Universitaire de Douera, Rue des Frères Halim, Douera 16000, Alger, Algeria
| | - E. Ducros
- Laboratoire Innotech International, 22 Avenue Aristide Briand, 94110 Arcueil, France
| | - C. Gouhier-Kodas
- Laboratoire Innotech International, 22 Avenue Aristide Briand, 94110 Arcueil, France
| | - S. Lancrenon
- Sylia-Stat, 10 Boulevard du Maréchal Joffre, 92340 Bourg-la-Reine, France
| | - H. Djoudi
- Centre Hospitalier Universitaire de Douera, Rue des Frères Halim, Douera 16000, Alger, Algeria
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Hussain A. Recommendations for culturally competent dermatology care of Muslim patients. J Am Acad Dermatol 2017; 77:388-389. [DOI: 10.1016/j.jaad.2017.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 03/03/2017] [Accepted: 03/11/2017] [Indexed: 10/19/2022]
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Bone health and vitamin D status in young epilepsy patients on valproate monotherapy. Clin Neurol Neurosurg 2016; 146:52-6. [DOI: 10.1016/j.clineuro.2016.04.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 01/28/2016] [Accepted: 04/25/2016] [Indexed: 11/19/2022]
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Sayed-Hassan R, Abazid N, Koudsi A, Alourfi Z. Vitamin D status and parathyroid hormone levels in relation to bone mineral density in apparently healthy Syrian adults. Arch Osteoporos 2016; 11:18. [PMID: 27126333 DOI: 10.1007/s11657-015-0245-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 10/29/2015] [Indexed: 02/03/2023]
Abstract
UNLABELLED Vitamin D deficiency was highly prevalent in this study. More than half of the participants with vitamin D level less than 5 ng/mL had secondary hyperparathyroidism, which implicated a major bone health concern. After adjustment for potential predictors, parathyroid hormone (PTH) explained about 3 % of the variance in total hip bone mineral density (BMD). PURPOSE Bone mineral density (BMD) is known to be influenced by serum 25-hydroxyvitamin D (25OHD) and intact parathyroid hormone (PTH) levels. The relationship between 25OHD and PTH with BMD has not been well documented in Syrian adults. We aimed to determine how differences in serum 25OHD and PTH levels impacted hip and lumbar spine BMD among apparently healthy Syrian adults. METHODS 25OHD and PTH were measured in 156 participants aged 18-53 years from Damascus and its surroundings. Lumbar spine and hip BMD measurements were measured by dual-energy X-ray absorptiometry using Hologic Discovery Wi densitometer. Multivariate regression models were used to investigate the relationships between 25OHD, PTH, and BMD. RESULTS All participants, except one male, had 25OHD <30 ng/mL (<75 nmol/L), and 89.1 % of them had 25OHD levels less than 20 ng/mL (50 nmol/L). Secondary hyperparathyroidism was significantly more prevalent in the lowest 25OHD quartile compared to that in the highest quartile (59 vs. 10.3 %, p < 0.0001). Mean bone mineral density at all sites in our participants was lower when compared to that of their Caucasian counterparts in Europe and North America. No significant correlation was found between 25OHD and BMD either at hip or at lumbar spine. In the multivariate analyses, after adjustment for potential predictors, PTH explained about 3 % of the variation in total hip BMD. CONCLUSIONS Low BMD was relatively frequent at all measured sites. PTH, but not 25OHD, was a predictor for total hip BMD in a young population.
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Affiliation(s)
- Rima Sayed-Hassan
- Department of Internal Medicine, Faculty of Medicine, Damascus University, Damascus, Syria
| | - Nizar Abazid
- Department of Family & Community Medicine, Faculty of Medicine, Damascus University, Mazzeh Autostrade, Damascus, Syria.
| | - Abir Koudsi
- Department of Family & Community Medicine, Faculty of Medicine, Damascus University, Mazzeh Autostrade, Damascus, Syria
| | - Zaynab Alourfi
- Department of Internal Medicine, Faculty of Medicine, Damascus University, Damascus, Syria
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