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Seasonality of vitamin D status in older people in Southern Germany: implications for assessment
from a clinical and public health perspective, it is important to understand the influence of seasonality on the serum vitamin D level to adequately assess and interpret an individual measurement. Therefore, the aim of this study was to analyse the effects of seasonal conditions on 25-hydroxyvitamin...
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| Published in: | Age and ageing 2013-05, Vol.42 (3), p.404-408 |
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| Main Authors: | , , , , , , , , |
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| cited_by | cdi_FETCH-LOGICAL-c530t-635eba53e7b82bc4a3a737febf63699e81ed65d91866743e20eb77b35b81fd063 |
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| cites | cdi_FETCH-LOGICAL-c530t-635eba53e7b82bc4a3a737febf63699e81ed65d91866743e20eb77b35b81fd063 |
| container_end_page | 408 |
| container_issue | 3 |
| container_start_page | 404 |
| container_title | Age and ageing |
| container_volume | 42 |
| creator | Klenk, Jochen Rapp, Kilian Denkinger, Michael Dieter Nagel, Gabriele Nikolaus, Thorsten Peter, Richard Koenig, Wolfgang Böhm, Bernhard Otto Rothenbacher, Dietrich |
| description | from a clinical and public health perspective, it is important to understand the influence of seasonality on the serum vitamin D level to adequately assess and interpret an individual measurement. Therefore, the aim of this study was to analyse the effects of seasonal conditions on 25-hydroxyvitamin D (25(OH)D) serum levels in a population-based cohort of older people.
between March 2009 and April 2010 the 25(OH)D serum level was assessed in 1,418 community-dwelling individuals living in Germany aged ≥65 years (56.7% men) with no subscribed vitamin D supplementation. Least-square means of monthly 25(OH)D serum levels with 95% confidence intervals (CI) were estimated, adjusted for gender, age and body mass index. Additionally, the proportion of vitamin deficiency ( |
| doi_str_mv | 10.1093/ageing/aft042 |
| format | article |
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between March 2009 and April 2010 the 25(OH)D serum level was assessed in 1,418 community-dwelling individuals living in Germany aged ≥65 years (56.7% men) with no subscribed vitamin D supplementation. Least-square means of monthly 25(OH)D serum levels with 95% confidence intervals (CI) were estimated, adjusted for gender, age and body mass index. Additionally, the proportion of vitamin deficiency (<20 ng/ml), insufficiency (20-<30 ng/ml) and sufficiency (30 ng/ml or higher) were estimated for each month. Finally, mean values of daily total global solar radiation and daylight were calculated for each month.
the minimum 25(OH)D serum level was observed in March with 15.4 ng/ml (SD = 6.56 ng/ml) and the maximum in August with 25.6 ng/ml (SD = 6.59 ng/ml). Compared with daylight and global solar radiation the progression over the year was similar but delayed by ∼2 months. The proportion of vitamin D deficiency, insufficiency and sufficiency were 78.8, 19.2 and 1.9% in March and 16.1, 63.4 and 20.5% in August, respectively.
vitamin D insufficiency was very common in this cohort and showed a strong seasonal effect with lowest values in March.</description><identifier>ISSN: 0002-0729</identifier><identifier>EISSN: 1468-2834</identifier><identifier>DOI: 10.1093/ageing/aft042</identifier><identifier>PMID: 23542723</identifier><identifier>CODEN: AANGAH</identifier><language>eng</language><publisher>England: Oxford University Press</publisher><subject>Age ; Age Factors ; Aged ; Aged, 80 and over ; Alfacalcidol ; Biomarkers - blood ; Calcifediol ; Cross-Sectional Studies ; Daylight ; Demographic aspects ; Elderly ; Female ; Food and nutrition ; Germany ; Germany - epidemiology ; Health aspects ; Humans ; Influence ; Linear Models ; Male ; Older people ; Photoperiod ; Radiation ; Seasonal variations (Diseases) ; Seasons ; Serum ; Sunlight ; Time Factors ; Vitamin D ; Vitamin D - analogs & derivatives ; Vitamin D - blood ; Vitamin D Deficiency - blood ; Vitamin D Deficiency - epidemiology ; Vitamin deficiency</subject><ispartof>Age and ageing, 2013-05, Vol.42 (3), p.404-408</ispartof><rights>Copyright Oxford Publishing Limited(England) May 2013</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c530t-635eba53e7b82bc4a3a737febf63699e81ed65d91866743e20eb77b35b81fd063</citedby><cites>FETCH-LOGICAL-c530t-635eba53e7b82bc4a3a737febf63699e81ed65d91866743e20eb77b35b81fd063</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925,30999,31000</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/23542723$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Klenk, Jochen</creatorcontrib><creatorcontrib>Rapp, Kilian</creatorcontrib><creatorcontrib>Denkinger, Michael Dieter</creatorcontrib><creatorcontrib>Nagel, Gabriele</creatorcontrib><creatorcontrib>Nikolaus, Thorsten</creatorcontrib><creatorcontrib>Peter, Richard</creatorcontrib><creatorcontrib>Koenig, Wolfgang</creatorcontrib><creatorcontrib>Böhm, Bernhard Otto</creatorcontrib><creatorcontrib>Rothenbacher, Dietrich</creatorcontrib><title>Seasonality of vitamin D status in older people in Southern Germany: implications for assessment</title><title>Age and ageing</title><addtitle>Age Ageing</addtitle><description>from a clinical and public health perspective, it is important to understand the influence of seasonality on the serum vitamin D level to adequately assess and interpret an individual measurement. Therefore, the aim of this study was to analyse the effects of seasonal conditions on 25-hydroxyvitamin D (25(OH)D) serum levels in a population-based cohort of older people.
between March 2009 and April 2010 the 25(OH)D serum level was assessed in 1,418 community-dwelling individuals living in Germany aged ≥65 years (56.7% men) with no subscribed vitamin D supplementation. Least-square means of monthly 25(OH)D serum levels with 95% confidence intervals (CI) were estimated, adjusted for gender, age and body mass index. Additionally, the proportion of vitamin deficiency (<20 ng/ml), insufficiency (20-<30 ng/ml) and sufficiency (30 ng/ml or higher) were estimated for each month. Finally, mean values of daily total global solar radiation and daylight were calculated for each month.
the minimum 25(OH)D serum level was observed in March with 15.4 ng/ml (SD = 6.56 ng/ml) and the maximum in August with 25.6 ng/ml (SD = 6.59 ng/ml). Compared with daylight and global solar radiation the progression over the year was similar but delayed by ∼2 months. The proportion of vitamin D deficiency, insufficiency and sufficiency were 78.8, 19.2 and 1.9% in March and 16.1, 63.4 and 20.5% in August, respectively.
vitamin D insufficiency was very common in this cohort and showed a strong seasonal effect with lowest values in March.</description><subject>Age</subject><subject>Age Factors</subject><subject>Aged</subject><subject>Aged, 80 and over</subject><subject>Alfacalcidol</subject><subject>Biomarkers - blood</subject><subject>Calcifediol</subject><subject>Cross-Sectional Studies</subject><subject>Daylight</subject><subject>Demographic aspects</subject><subject>Elderly</subject><subject>Female</subject><subject>Food and nutrition</subject><subject>Germany</subject><subject>Germany - epidemiology</subject><subject>Health aspects</subject><subject>Humans</subject><subject>Influence</subject><subject>Linear Models</subject><subject>Male</subject><subject>Older people</subject><subject>Photoperiod</subject><subject>Radiation</subject><subject>Seasonal variations (Diseases)</subject><subject>Seasons</subject><subject>Serum</subject><subject>Sunlight</subject><subject>Time Factors</subject><subject>Vitamin D</subject><subject>Vitamin D - analogs & derivatives</subject><subject>Vitamin D - blood</subject><subject>Vitamin D Deficiency - blood</subject><subject>Vitamin D Deficiency - epidemiology</subject><subject>Vitamin deficiency</subject><issn>0002-0729</issn><issn>1468-2834</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>7QJ</sourceid><recordid>eNqN0kFvFCEUB3BiNHatHr0aEi9exgKPAcZbs2o1adJD9YzM7JuVhoERGON-e2ezVRNPvfB4yS-EvPcn5CVnbznr4MLt0cf9hRsrk-IR2XCpTCMMyMdkwxgTDdOiOyPPSrlbW95y8ZScCWil0AI25NstupKiC74eaBrpT1_d5CN9T0t1dSl0vaeww0xnTHPAY3-blvodc6RXmCcXD--on-bgB1d9ioWOKVNXCpYyYazPyZPRhYIv7us5-frxw5ftp-b65urz9vK6GVpgtVHQYu9aQN0b0Q_SgdOgR-xHBarr0HDcqXbXcaOUloCCYa91D21v-LhjCs7Jm9O7c04_FizVTr4MGIKLmJZiOWiQpgPBH0BbIYxZjwdQqThvjWYrff0fvUtLXid7VEoarqHrVtWc1N4FtD4OKVb8VYcUAu7RriPZ3thLkCDXBSn454ecSsk42jn7yeWD5cweA2BPAbCnAKz-1f0vln7C3V_9Z-PwG-dLq7w</recordid><startdate>20130501</startdate><enddate>20130501</enddate><creator>Klenk, Jochen</creator><creator>Rapp, Kilian</creator><creator>Denkinger, Michael Dieter</creator><creator>Nagel, Gabriele</creator><creator>Nikolaus, Thorsten</creator><creator>Peter, Richard</creator><creator>Koenig, Wolfgang</creator><creator>Böhm, Bernhard Otto</creator><creator>Rothenbacher, Dietrich</creator><general>Oxford University Press</general><general>Oxford Publishing Limited (England)</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QJ</scope><scope>7T5</scope><scope>7TK</scope><scope>7U9</scope><scope>H94</scope><scope>K9.</scope><scope>NAPCQ</scope><scope>7X8</scope><scope>7T2</scope><scope>7U2</scope><scope>C1K</scope></search><sort><creationdate>20130501</creationdate><title>Seasonality of vitamin D status in older people in Southern Germany: implications for assessment</title><author>Klenk, Jochen ; Rapp, Kilian ; Denkinger, Michael Dieter ; Nagel, Gabriele ; Nikolaus, Thorsten ; Peter, Richard ; Koenig, Wolfgang ; Böhm, Bernhard Otto ; Rothenbacher, Dietrich</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c530t-635eba53e7b82bc4a3a737febf63699e81ed65d91866743e20eb77b35b81fd063</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Age</topic><topic>Age Factors</topic><topic>Aged</topic><topic>Aged, 80 and over</topic><topic>Alfacalcidol</topic><topic>Biomarkers - blood</topic><topic>Calcifediol</topic><topic>Cross-Sectional Studies</topic><topic>Daylight</topic><topic>Demographic aspects</topic><topic>Elderly</topic><topic>Female</topic><topic>Food and nutrition</topic><topic>Germany</topic><topic>Germany - epidemiology</topic><topic>Health aspects</topic><topic>Humans</topic><topic>Influence</topic><topic>Linear Models</topic><topic>Male</topic><topic>Older people</topic><topic>Photoperiod</topic><topic>Radiation</topic><topic>Seasonal variations (Diseases)</topic><topic>Seasons</topic><topic>Serum</topic><topic>Sunlight</topic><topic>Time Factors</topic><topic>Vitamin D</topic><topic>Vitamin D - analogs & derivatives</topic><topic>Vitamin D - blood</topic><topic>Vitamin D Deficiency - blood</topic><topic>Vitamin D Deficiency - epidemiology</topic><topic>Vitamin deficiency</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Klenk, Jochen</creatorcontrib><creatorcontrib>Rapp, Kilian</creatorcontrib><creatorcontrib>Denkinger, Michael Dieter</creatorcontrib><creatorcontrib>Nagel, Gabriele</creatorcontrib><creatorcontrib>Nikolaus, Thorsten</creatorcontrib><creatorcontrib>Peter, Richard</creatorcontrib><creatorcontrib>Koenig, Wolfgang</creatorcontrib><creatorcontrib>Böhm, Bernhard Otto</creatorcontrib><creatorcontrib>Rothenbacher, Dietrich</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Applied Social Sciences Index & Abstracts (ASSIA)</collection><collection>Immunology Abstracts</collection><collection>Neurosciences Abstracts</collection><collection>Virology and AIDS Abstracts</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Nursing & Allied Health Premium</collection><collection>MEDLINE - Academic</collection><collection>Health and Safety Science Abstracts (Full archive)</collection><collection>Safety Science and Risk</collection><collection>Environmental Sciences and Pollution Management</collection><jtitle>Age and ageing</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Klenk, Jochen</au><au>Rapp, Kilian</au><au>Denkinger, Michael Dieter</au><au>Nagel, Gabriele</au><au>Nikolaus, Thorsten</au><au>Peter, Richard</au><au>Koenig, Wolfgang</au><au>Böhm, Bernhard Otto</au><au>Rothenbacher, Dietrich</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Seasonality of vitamin D status in older people in Southern Germany: implications for assessment</atitle><jtitle>Age and ageing</jtitle><addtitle>Age Ageing</addtitle><date>2013-05-01</date><risdate>2013</risdate><volume>42</volume><issue>3</issue><spage>404</spage><epage>408</epage><pages>404-408</pages><issn>0002-0729</issn><eissn>1468-2834</eissn><coden>AANGAH</coden><abstract>from a clinical and public health perspective, it is important to understand the influence of seasonality on the serum vitamin D level to adequately assess and interpret an individual measurement. Therefore, the aim of this study was to analyse the effects of seasonal conditions on 25-hydroxyvitamin D (25(OH)D) serum levels in a population-based cohort of older people.
between March 2009 and April 2010 the 25(OH)D serum level was assessed in 1,418 community-dwelling individuals living in Germany aged ≥65 years (56.7% men) with no subscribed vitamin D supplementation. Least-square means of monthly 25(OH)D serum levels with 95% confidence intervals (CI) were estimated, adjusted for gender, age and body mass index. Additionally, the proportion of vitamin deficiency (<20 ng/ml), insufficiency (20-<30 ng/ml) and sufficiency (30 ng/ml or higher) were estimated for each month. Finally, mean values of daily total global solar radiation and daylight were calculated for each month.
the minimum 25(OH)D serum level was observed in March with 15.4 ng/ml (SD = 6.56 ng/ml) and the maximum in August with 25.6 ng/ml (SD = 6.59 ng/ml). Compared with daylight and global solar radiation the progression over the year was similar but delayed by ∼2 months. The proportion of vitamin D deficiency, insufficiency and sufficiency were 78.8, 19.2 and 1.9% in March and 16.1, 63.4 and 20.5% in August, respectively.
vitamin D insufficiency was very common in this cohort and showed a strong seasonal effect with lowest values in March.</abstract><cop>England</cop><pub>Oxford University Press</pub><pmid>23542723</pmid><doi>10.1093/ageing/aft042</doi><tpages>5</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0002-0729 |
| ispartof | Age and ageing, 2013-05, Vol.42 (3), p.404-408 |
| issn | 0002-0729 1468-2834 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1373489321 |
| source | Applied Social Sciences Index & Abstracts (ASSIA); Oxford Journals Online |
| subjects | Age Age Factors Aged Aged, 80 and over Alfacalcidol Biomarkers - blood Calcifediol Cross-Sectional Studies Daylight Demographic aspects Elderly Female Food and nutrition Germany Germany - epidemiology Health aspects Humans Influence Linear Models Male Older people Photoperiod Radiation Seasonal variations (Diseases) Seasons Serum Sunlight Time Factors Vitamin D Vitamin D - analogs & derivatives Vitamin D - blood Vitamin D Deficiency - blood Vitamin D Deficiency - epidemiology Vitamin deficiency |
| title | Seasonality of vitamin D status in older people in Southern Germany: implications for assessment |
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