TY - JOUR
T1 - The Prevalence of Vitamin D Deficiency and the Determinants of 25(OH)D Concentration in Older Irish Adults
T2 - Data From The Irish Longitudinal Study on Ageing (TILDA)
AU - Laird, Eamon
AU - O'Halloran, Aisling M
AU - Carey, Daniel
AU - Healy, Martin
AU - O'Connor, Deirdre
AU - Moore, Patrick V
AU - Shannon, Tom
AU - Molloy, Anne M
AU - Kenny, Rose Anne
PY - 2018/3/14
Y1 - 2018/3/14
N2 - Background: Few data are available examining the determinants of vitamin D status exclusively in older adults. We aimed to investigate the prevalence and determinants of vitamin D deficiency in a representative sample of the older Irish population (aged 50-98 years).Methods: The concentration of 25-hydroxyvitamin D (25(OH)D) was measured in 5,356 community-dwelling older Irish adults from The Irish Longitudinal Study on Ageing (TILDA). Detailed demographic, geographic, lifestyle, and socioeconomic factors were assessed by questionnaire. Proportions of deficiency prevalence were generated by season sampled. Linear regression was used to investigate the association between 25(OH)D concentration and reported risk factors.Results: The prevalence of deficiency (25(OH)D < 30 nmol/L) was 13.1% (95% CI: 12.1-14.2). Deficiency status was more prevalent in nonsupplement users, in winter, in smokers, in obese adults, the physically inactive, those living alone, and in the oldest old (>80 years). The main predictors (p < .05) of 25(OH)D concentration were supplement use (coefficient nmol/L: 27.2 [95% CI: 15.3-39.2]), smoking (-8.9 [-12.6--5.2]), summer season (5.9 [2.7-9.1]), and obesity (-4.0 [-6.3--1.7]).Conclusion: Vitamin D deficiency is common among older Irish adults. These data indicate the need for targeted strategies within sections of the older population to improve vitamin D status.
AB - Background: Few data are available examining the determinants of vitamin D status exclusively in older adults. We aimed to investigate the prevalence and determinants of vitamin D deficiency in a representative sample of the older Irish population (aged 50-98 years).Methods: The concentration of 25-hydroxyvitamin D (25(OH)D) was measured in 5,356 community-dwelling older Irish adults from The Irish Longitudinal Study on Ageing (TILDA). Detailed demographic, geographic, lifestyle, and socioeconomic factors were assessed by questionnaire. Proportions of deficiency prevalence were generated by season sampled. Linear regression was used to investigate the association between 25(OH)D concentration and reported risk factors.Results: The prevalence of deficiency (25(OH)D < 30 nmol/L) was 13.1% (95% CI: 12.1-14.2). Deficiency status was more prevalent in nonsupplement users, in winter, in smokers, in obese adults, the physically inactive, those living alone, and in the oldest old (>80 years). The main predictors (p < .05) of 25(OH)D concentration were supplement use (coefficient nmol/L: 27.2 [95% CI: 15.3-39.2]), smoking (-8.9 [-12.6--5.2]), summer season (5.9 [2.7-9.1]), and obesity (-4.0 [-6.3--1.7]).Conclusion: Vitamin D deficiency is common among older Irish adults. These data indicate the need for targeted strategies within sections of the older population to improve vitamin D status.
KW - Aged
KW - Aged, 80 and over
KW - Demography
KW - Female
KW - Humans
KW - Ireland/epidemiology
KW - Longitudinal Studies
KW - Male
KW - Middle Aged
KW - Prevalence
KW - Risk Factors
KW - Surveys and Questionnaires
KW - Vitamin D/analogs & derivatives
KW - Vitamin D Deficiency/epidemiology
U2 - 10.1093/gerona/glx168
DO - 10.1093/gerona/glx168
M3 - Article (Academic Journal)
C2 - 28958047
SN - 1079-5006
VL - 73
SP - 519
EP - 525
JO - Journals of Gerontology, Series A
JF - Journals of Gerontology, Series A
IS - 4
ER -
