Electronic ISSN 2287-0237

VOLUME

A CROSS SECTION STUDY OF VITAMIN D LEVELS IN THAI OFFICE WORKERS

FEBRUARY 2015 - VOL.9 | ORIGINAL ARTICLE
OBJECTIVES:

To determine the current level of serum vitamin D of adult Thai  office workers in 2014 by using a standard laboratory method and its level in relation  to sex, age, sunlight exposure and dressing.

MATERIALS AND METHODS:

This is a cross section study of 211 Thai office and field workers of one company performed in April 2014. The study used an electro- chemiluminescence (or electrogenerated chemiluminescence (ECL)) method to determine their blood level of 25(OH)D. Their level of 25(OH)D then was analyzed against their age, sex, sunlight exposure time, and choice of clothing, using pearson coefficient.

RESULTS:

Two hundred and eleven  office workers aged between 23 and 63 years  old were included in this study. Eighty one of these were male and 124 were female. Of these, 72.5% are aged between 31 and 50 years old. Ten percent of them are underweight, while 27.2% of them are overweight (BMI > 25 kg/m2). One hundred and thirty four of them (63.5%) had vitamin D level > 20 ng/ml considered normal by Thai normal value rates. Seventy seven of them (36.5%) had vitamin D levels less than 20 ng/ml or had hypovitaminosis D by Thai normal value rates. There is no significant relation between vitamin D levels and age, sex, sunlight exposure time, and choice of clothing. 

CONCLUSION:

About a third (36.5%) of these Thai office workers were deemed to have hypovitaminosis D when measured against the standard normal value of 20 ng/ml upwards. The level of vitamin D from this study is much lower than previously estimated and will change the health promotion and disease prevention methodology for diseases related to hypovitaminosis-D in the future.

Keywords:

vitamin-D, 25(OH)D, hypovitaminosis-D, level, Thai adult

MEDIA
Table 1:
Percentage of volunteers by 25(OH)D level.
Table 2:
correlation matrix of variables for 25(OH)D level.
Table 3:
25(OH)D level by variable factors (n = 77).
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