Vitamin D status of Maori and non-Maori octogenarians in New Zealand: a Cohort Study (LiLACS NZ)

被引:5
作者
Bacon, Catherine J. [1 ]
Kerse, Ngaire [1 ]
Hayman, Karen J. [1 ]
Moyes, Simon A. [1 ]
Teh, Ruth O. [1 ]
Kepa, Mere [1 ]
Pillai, Avinesh [2 ]
Dyall, Lorna [1 ]
机构
[1] Univ Auckland, Fac Med & Hlth Sci, Dept Gen Practice & Primary Hlth Care, Auckland 1, New Zealand
[2] Univ Auckland, Dept Stat, Auckland 1, New Zealand
关键词
calciferol; seasonal variation; ethnic groups; aged 80 and over; elderly; SERUM 25-HYDROXYVITAMIN D; PARATHYROID-HORMONE LEVELS; SEASONAL-VARIATION; OLDER MEN; PHYSICAL-ACTIVITY; NATIONAL DIET; ADVANCED AGE; D DEFICIENCY; SKIN COLOR; FAT MASS;
D O I
10.6133/apjcn.092015.42
中图分类号
R15 [营养卫生、食品卫生]; TS201 [基础科学];
学科分类号
100403 ;
摘要
Background and Objectives: This study assessed vitamin D status and its determinants in a cohort of octogenarians living within New Zealand's Bay of Plenty and Lakes Districts. Methods and Study Design: Serum 25-hydroxyvitamin D [25(OH)D] concentration was measured in 209 Maori (aged 80-90 years) and 357 non-Maori (85 years), along with demographic, lifestyle, supplement use and other health data. Results: Mean [95% CI] 25(OH)D concentration was 69 [67 to 72] nmol/L, with 15% >100 nmol/L and 6 individuals >150 nmol/L. Concentrations in Maori (59 [55 to 62] 4 nmol/L) were lower than in non-Maori (75 [72 to 78] nmol/L; p<0.001), a difference maintained when adjusted for day-of-year measured. Vitamin D supplementation was reported by 98 participants (18%): including a greater proportion of women (24%) than men (11%; p<0.001) and of non-Maori (24%) than Maori (7%; p<0.001). Of those taking vitamin D, 49% took high oral doses (>= 25 mu g/day or equivalent) and five individuals took >50 mu g/day. Vitamin D supplement use strongly and independently predicted seasonally-adjusted 25(OH)D concentration and was associated with 28 nmol/L higher levels than non-use. Other predictors included Maori ethnicity (10 nmol/L lower concentration than for non-Maori), and female gender (11 nmol/L lower). Conclusions: Vitamin D status in New Zealand octogenarians appears higher than previously reported, particularly in non-Maori compared to Maori. Prescribed and non-prescribed oral vitamin D supplementation is prevalent in this group and a strong indicator of vitamin D status.
引用
收藏
页码:885 / 897
页数:13
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