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More sunlight, more vitamin D, less hypertension - Feb 2012

http://www.hindawi.com/journals/ije/2012/732636/
Clinical Study Associations of Sun Exposure with 25-Hydroxyvitamin D and Parathyroid Hormone Levels in a Cohort of Hypertensive Patients:
The Graz Endocrine Causes of Hypertension (GECOH) Study
International Journal of Endocrinology
Volume 2012 (2012), Article ID 732636, 8 pages
doi:10.1155/2012/732636

Stefan Pilz,1,2 Katharina Kienreich,1 Daniel Stückler,1 Andreas Meinitzer,3 and Andreas Tomaschitz11Division of Endocrinology and Metabolism, Department of Internal Medicine, Medical University of Graz, 8036 Graz, Austria
2Department of Epidemiology and Biostatistics and EMGO Institute for Health and Care Research, VU University Medical Center, 1081 BT Amsterdam, The Netherlands
3Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, 8036 Graz, AustriaReceived 13 October 2011; Accepted 5 December 2011Academic Editor: Vin Tangpricha Copyright © 2012 Stefan Pilz et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

(Worst case of formatting on the internet I have ever seen. The x x x below are areas for which formatting was unrecoverable - see the PDF file at bottom of this page)

Sunlight-induced vitamin D, synthesis in the skin is the major source of vitamin D, but data on the relationship of sun-related behaviour with vitamin D and parathyroid hormone (PTH) levels are relatively sparse. We evaluated whether habitual sun exposure is associated with 25-hydroxyvitamin D (25[OH]D) and PTH levels and whether there exist seasonal variations.
We examined 111 hypertensive patients in Austria (latitude 47°?N).

  • Frequent sunbathing at home and
  • outdoor sports

were associated with higher 25(OH)D levels ( x x x for both).
Red or blond scalp hair as a child,
memory of sunburns,
preferring sunbathing,
frequent stays on the beach or in open-air pools, and
solarium use
were associated with lower PTH levels ( x x x x for all).
Multiple linear regression analyses including age, sex, and body mass index showed that sun exposure score was significantly associated with 25(OH)D (beta x x x x) by trend with PTH (beta x x x x)

These associations were more prominent in summer in which 25(OH)D levels were significantly higher compared to winter.
Translation of these findings into recommendations for the prevention and treatment of vitamin D deficiency remains a challenge for the future.

Table 2 Sunlight behavior and vitamin D - only those items with low P values are significant
Image

Table 2 Sunlight behavior and vitamin D again ( poorly extracted, but somewhat usable for translation)

]>Associations of Sun Exposure with 25-Hydroxyvitamin D and Parathyroid Hormone Levels in a Cohort of Hypertensive Patients: The Graz Endocrine Causes of Hypertension (GECOH) Study : Table 2
Table 2: Associations of 25-hydroxyvitamin D with answers from a sun behaviour questionnaire.

Question numberQuestion contentAnswer scores 𝑃 value
0123

1Personal sun relationship28 ? 631 ? 1537 ? 1938 ? 230.06
𝑛 = 8 𝑛 = 6 0 𝑛 = 3 4 𝑛 = 9
2Skin reaction to sun28 ? 1233 ? 1635 ? 1633 ? 200.25
𝑛 = 1 7 𝑛 = 2 5 𝑛 = 4 9 𝑛 = 2 0
3Scalp hair as a child33 ? 1534 ? 170.79
𝑛 = 4 2 𝑛 = 6 9
4aMemory of sunburns33 ? 1734 ? 1634 ? 180.68
𝑛 = 5 1 𝑛 = 3 9 𝑛 = 2 1
4bEver sunburns18 ? 834 ? 170.07
𝑛 = 4 𝑛 = 1 0 7
5aBeach or open-air pools31 ? 1437 ? 190.05
𝑛 = 6 3 𝑛 = 4 8
5bSunbathing at home31 ? 1438 ? 210.04
𝑛 = 7 3 𝑛 = 3 8
5cGardening35 ? 1732 ? 160.37
𝑛 = 6 8 𝑛 = 4 3
5dWater sports or shipping34 ? 1731 ? 130.55
𝑛 = 9 9 𝑛 = 1 2
5eOther outdoor sports30 ? 1540 ? 180.003
𝑛 = 7 4 𝑛 = 3 7
5fOutdoor work32 ? 1636 ? 180.29
𝑛 = 8 5 𝑛 = 2 6
5gHolidays in sunny countries29 ? 1530 ? 1634 ? 1636 ? 170.07
𝑛 = 1 3 𝑛 = 2 3 𝑛 = 2 1 𝑛 = 5 4
5hSolarium33 ? 1734 ? 160.92
𝑛 = 9 2 𝑛 = 1 9 𝑛 = 0
5iLight or UV therapy33 ? 1635 ? 240.87
𝑛 = 1 0 6 𝑛 = 5

25-hydroxyvitamin D data are shown in ng/mL as means ? standard deviation.
𝑃 values are derived from either Students t-test or from analysis of variance (ANOVA) with 𝑃 for trend.

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See also VitaminDWiki

Attached files

ID Name Comment Uploaded Size Downloads
1104 Sunlight and vitamin D.pdf PDF admin 18 Feb, 2012 13:47 515.85 Kb 665
1103 sun and vitamin D.jpg Table 2 admin 18 Feb, 2012 13:39 31.46 Kb 1105
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