25-Hydroxy-Vitamin D, Diet and Sunlight Exposure in Patients Admitted to a Geriatric Unit

Nayal, A.S.; MacLennan, W. J.; Hamilton, Judith C.; Rose, Philip G.; Kong, Mary

doi:10.1159/000212244

Cited by 29 publications

(10 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since women with either low or normal 25OHD levels had similar dietary vitamin D intakes, our results indicate that in white postmenopausal females, vitamin D deficiency is primarily accounted for by diminished sunlight exposure. On the other hand, in agreement with previous reports (15)(16)(17), the positive correlation between 25OHD and dietary vitamin D intake noted in individuals with low 25OHD suggests that in this subset of women, circulating 25OHD levels are primarily dependent on dietary sources. However, the vitamin D intake is apparently inadequate to compensate for the lack of sunshine exposure.…”

Section: Discussionsupporting

confidence: 92%

“…Historically, most of the studies on vitamin D deficiency were performed in elderly populations of Northern Europe (13)(14)(15)(16)(17)(18). In the United States, because of the lower latitude and food supplementation, vitamin D deficiency is not commonly regarded as an important clinical problem (12,19), and consequently, not much effort has been devoted to evaluating the vitamin D status of the elderly population in this country.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Subclinical Vitamin D Deficiency in Postmenopausal Women with Low Vertebral Bone Mass*

Villareal

Civitelli

Chines

et al. 1991

The Journal of Clinical Endocrinology & Metabolism

242

109

View full text Add to dashboard Cite

To define the potential role of subclinical vitamin D deficiency in postmenopausal bone loss, we analyzed the levels of circulating 25-hydroxyvitamin D (25OHD) in 539 midwestern caucasian women screened for osteoporosis. Low 25OHD (less than 38 nmol/L) was found in 49 subjects (aged 52-77 yr). Women with low 25OHD had a reduced vertebral bone density (VBD), assessed by quantitative computed tomography, compared to age-matched controls (P less than 0.001). They also had significantly lower levels of serum calcium and phosphate, lower urinary calcium, higher serum alkaline phosphatase, and, in most cases, increased immunoreactive PTH (iPTH) concentrations, suggesting secondary hyperparathyroidism. Furthermore, only in the low 25OHD group did VBD correlate directly with 25OHD (r = 0.41; P less than 0.01), and inversely with iPTH (r = -0.47; P less than 0.01). Multivariate analyses revealed that iPTH was the major determinant of the observed decrease in VBD. Seasonal variations of serum 25OHD were noted only in the control population; in this group the 25OHD levels also correlated with sunlight exposure (r = 0.48; P less than 0.01), as assessed by an outdoor score. Thus, vitamin D deficiency develops when both the endogenous and exogenous sources are insufficient and contributes to a reduced bone mass in elderly women.

show abstract

Section: Discussionsupporting

confidence: 92%

mentioning

confidence: 99%

Subclinical Vitamin D Deficiency in Postmenopausal Women with Low Vertebral Bone Mass*

Villareal

Civitelli

Chines

et al. 1991

The Journal of Clinical Endocrinology & Metabolism

242

109

View full text Add to dashboard Cite

show abstract

“…The rela tively low but significant correlation between the dietary vitamin D intake and the 25-OH-D concentrations indicates that the method used in this study for estimating vitamin D intake was good as the intraindividual varia tions are minimized. The correlation coeffi cient is comparable to that reported by Nayal et al [21] and Haddad and Hahn [22], Taking together the 25-OH-D concentra tions in serum, the estimated daily intake of vitamin D and the exposure to sunlight it can be stated that the long-stay geriatric patients suffer from vitamin D deficiency due both to deficient dietary intake and to lack of sun shine. This view is further supported by the observation of Guillemant et al [23] who did not find any significant impaired absorption of vitamin D from the intestine in elderly people as compared with young adults.…”

Section: Discussionsupporting

confidence: 86%

Vitamin D Intake, Sunlight Exposure and 25-Hydroxyvitamin D Levels in the Elderly during One Year

Lamberg‐Allardt¹

1984

Ann Nutr Metab

View full text Add to dashboard Cite

3 groups of elderly people (65–80 years) were studied as regards their serum 25-hydroxyvitamin D (25-OH-D) concentrations, their dietary vitamin D intake and sunlight exposure during 1 year: group 1 (long-stay geriatric patients); group 2 (residents at an old people’s home), and group 3 (elderly people living in their own homes). Young adults (30–50 years) served as controls. The 25-OH-D concentration in group 1 was significantly lower during the whole year than in any other group and the concentration in group 2 was significantly lower than in group 3 and the controls. The low 25-OH-D level in the long-stay geriatric patients and in the residents at the old people’s home is a consequence of both a low dietary vitamin D intake and a low exposure to sunlight.

show abstract

“…However, a positive correlation be tween dietary vitamin D intake and serum 25-OH-D concentration has been docu mented in many studies, thus indicating that dietary vitamin D could be of importance at least in Northern countries such as Finland and the Scandinavian countries [22][23][24]. In the present study, no correlation between vi tamin D intake and serum 25-OH-D concen tration was found.…”

Section: Discussioncontrasting

confidence: 68%

Vitamin D Status of Children and Adolescents in Finland

Lamberg‐Allardt¹,

Ala‐Houhala²,

Ahola³

et al. 1986

Ann Nutr Metab

View full text Add to dashboard Cite

3-,9- and 15-year-old children were studied in autumn in order to evaluate their serum 25-hydroxy-vitamin D (25-OH-D) concentration and their vitamin D intake. The 25-OH-D was significantly lower in the 15-year-old than in the other children, but it was satisfactory in all groups as compared to the 25-OH-D of healthy, young adults. The mean dietary vitamin D intake as well as the mean total vitamin D intake including supplements was low in all groups of children. With a vitamin D intake as low as in this study, every house-bound child would be at risk of vitamin D deficiency.

show abstract

25-Hydroxy-Vitamin D, Diet and Sunlight Exposure in Patients Admitted to a Geriatric Unit

Cited by 29 publications

References 8 publications

Subclinical Vitamin D Deficiency in Postmenopausal Women with Low Vertebral Bone Mass*

Subclinical Vitamin D Deficiency in Postmenopausal Women with Low Vertebral Bone Mass*

Vitamin D Intake, Sunlight Exposure and 25-Hydroxyvitamin D Levels in the Elderly during One Year

Vitamin D Status of Children and Adolescents in Finland

Contact Info

Product

Resources

About