Vitamin D status and associated factors among Portuguese older adults: results from the Nutrition UP 65 cross-sectional study.

ABSTRACT:

Objectives

To evaluate vitamin D status and its associated factors in Portuguese older adults from the Nutrition UP 65 study.

Design

Cross-sectional observational study.

Participants and methods

Nationwide cluster sample of 1500 Portuguese subjects ≥65 years old. Participants were classified, according to US Institute of Medicine cut-offs, as presenting normal 25-hydroxyvitamin D (25(OH)D) levels (≥50.0 nmol/L), at risk of inadequacy (30.0-49.9 nmol/L) or at risk of deficiency (<30 nmol/L). The association between individuals' characteristics and 25(OH)D levels was analysed through multinomial logistic regression analysis.

Results

Median 25(OH)D serum value was 36.1 (interquartile range (IQR): 35.5) nmol/L. According to the used cut-offs, 39.6% of participants

SUBMITTER: Santos A 

PROVIDER: S-EPMC5724139 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature