25-Hydroxyvitamin D Measurement, 2009: A Review for Clinicians

Binkley, Neil; Krueger, Diane; Lensmeyer, Gary L.

doi:10.1016/j.jocd.2009.06.001

Cited by 63 publications

(37 citation statements)

References 61 publications

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“…Other limitations of this study include imprecision in the quantification of 25OHD, and the measurement of 25OHD based on one blood sample that was collected at a single time point, similar to the approach of past studies 8,9) . A few studies have demonstrated that the radioimmunoassay for 25OHD is more reliable than competitive protein-binding assays 18,19) , which is an important consideration as assay variation and standardization of 25OHD measurements are an important issue in this field of research [19][20][21][22] . Nondifferential measurement error and subsequent misclassification would lead to a null association.…”

Section: Discussionmentioning

confidence: 99%

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Association between Night-shift Work and Serum 25-hydroxyvitamin D Levels in Japanese Male Indoor Workers: A Cross-sectional Study

Itoh¹,

Weng²,

Saito³

et al. 2011

Ind Health

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Although low vitamin D status resulting from night work is a suspected cause of various health disorders, few studies have investigated the association between night-shift work and vitamin D status. Here, we examined serum 25-hydroxyvitamin D (25OHD) levels in 19 Japanese indoor workers, including night-shift workers, in blood samples collected at the annual medical checkup (late July) in a metal tool factory. Analyses were finally restricted to 14 male workers (33-59 yr) in 3 groups: fixed daytime work (n=6), and rotating shift work with (n=4) and without (n=4) night shifts. No significant differences in serum 25OHD levels were observed among the three groups (p=0.98, Kruskal-Wallis test). One to two participants in each group had 25OHD levels lower than the 20 ng/ml reference value for vitamin D deficiency even in summer. These results clearly indicate the need for large-scale studies to test the hypothesis that night-shift work is associated with lower 25OHD levels.

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Section: Discussionmentioning

confidence: 99%

“…Nondifferential measurement error and subsequent misclassification would lead to a null association. Although the measurement of 25OHD using high performance liquid chromatography isotope-dilution tandem mass spectrometry is considered to be the most reliable approach 21) , the high cost of this equipment and the reagents limit their use.…”

Section: Discussionmentioning

confidence: 99%

Association between Night-shift Work and Serum 25-hydroxyvitamin D Levels in Japanese Male Indoor Workers: A Cross-sectional Study

Itoh¹,

Weng²,

Saito³

et al. 2011

Ind Health

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“…Third, all analyses of 25OHD were conducted on the same day to exclude confounding caused by between-day assay variation 35,36) . A few studies have demonstrated that the radioimmunoassay for 25OHD is more reliable than competitive protein-binding assays 26,37) , which is an important consideration as assay variation and standardization of 25OHD measurements are an important issue in this field of research 31,35,37,38) . In addition to the possibility of clinical misinterpretation [39][40][41] , nondifferential measurement error and subsequent misclassification would lead to underestimation of relative risks.…”

Section: Discussionmentioning

confidence: 99%

“…Quantitative measurement of such error and intraindividual inter-day variation would therefore be useful for estimating the true effects of risk factors such as 25OHD 42) . Although the measurement of 25OHD using high performance liquid chromatography isotope-dilution tandem mass spectrometry is considered to be the most reliable approach 38) , the high cost of this equipment and the reagents limit their use.…”

Section: Discussionmentioning

confidence: 99%

Vitamin D Deficiency and Seasonal and Inter-day Variation in Circulating 25-hydroxyvitamin D and Parathyroid Hormone Levels in Indoor Daytime Workers: A Longitudinal Study

et al. 2011

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D (p=0.62). Notably, nearly all measured 25OHD levels in February were lower than the reference value of 20 ng/ml. Our study identified the occurrence of seasonal variation in circulating 25OHD and intact PTH levels, even after accounting for inter-day variability, and hypovitaminosis D in wintertime in indoor daytime male workers in Japan. Due to this variability, single spot measurements of 25OHD may lead to misjudgment of workers' vitamin D status.

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“…Serum 25(OH)D level has been considered as the most reliable indicator of vitamin D status [3]; it reflects the state of repletion or deficiency of vitamin D in the body [3]- [5].…”

Section: Introductionmentioning

confidence: 99%

Hypovitaminosis D and Associated Risk Factors in Postmenopausal Women

Masoni¹,

Menoyo²,

Bocanera³

et al. 2014

Health

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Given the relevance of vitamin D in calcium metabolism homeostatic control, as well as its role as differentiation and cell proliferation modulator, it is important to study its circulating level in patients considered at risk, in order to develop prevention strategies. We studied 77 postmenopausal women with no history of osteoactive drug therapy, corticosteroid intake or diseases that could alter bone metabolism, attending the Menopause Center at the Hospital Provincial del Centenario, Rosario, Argentina. A medical history was taken, and a food consumption frequency questionnaire was applied in order to estimate daily calcium intake. To assess daily physical exercise, work and sports activities were investigated. Serum parathyroid hormone (PTH) and 25(OH)D were measured, and a hip DXA scan was performed in every patient. An inappropriate level of 25(OH)D was observed in 86.3% of patients. The 25(OH)D average value was found within the insufficiency range (<30 ng/ml) whereas PTH average concentration fell within the normal range, and bone mineral density average value was found within the osteopenic category. A statistically significant negative logarithmic association was observed between serum PTH level and vitamin D status (p = 0.01). Mean 25(OH)D concentration among patients who had reported fractures was significantly lower than the corresponding to women who had not suffered this type of event. Patients with vitamin D deficiency had significantly wider mean Cobb angle; higher sum of wedge angles of T4 -T12 vertebral bodies mean values, and higher uncompromised vertebrae wedge angle values than non-deficient women. This study shows high hypovitaminosis D occurrence among these postmenopausal women.

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25-Hydroxyvitamin D Measurement, 2009: A Review for Clinicians

Cited by 63 publications

References 61 publications

Association between Night-shift Work and Serum 25-hydroxyvitamin D Levels in Japanese Male Indoor Workers: A Cross-sectional Study

Association between Night-shift Work and Serum 25-hydroxyvitamin D Levels in Japanese Male Indoor Workers: A Cross-sectional Study

Vitamin D Deficiency and Seasonal and Inter-day Variation in Circulating 25-hydroxyvitamin D and Parathyroid Hormone Levels in Indoor Daytime Workers: A Longitudinal Study

Hypovitaminosis D and Associated Risk Factors in Postmenopausal Women

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