Standardizing 25-hydroxyvitamin D values from the Canadian Health Measures Survey

Abstract

The shifts in 25(OH)D distribution brought about by standardization indicate its importance in drawing correct conclusions about potential population deficiencies and insufficiencies and in permitting the comparison of distributions between national surveys.

Vitamin D status among the elderly Chinese population: a cross-sectional analysis of the 2010–2013 China national nutrition and health survey (CNNHS)

“…The prevalence of vitamin D deficiency peaked at approximately 40 and 50% for men and women, respectively, during the spring season. The prevalence of vitamin D levels <50 nmol/l among Chinese adults is 34.3%, which is similar to that of the Canadian population (36.8%) [16], slightly lower than that of the European population(40.4%) [17] and higher than that of the US population (24%) [18]. In this study, the median 25(OH)D level in Chinese adults was 61.0 nmol/l, which was similar with the studies in the US [18] (median 25(OH)D 3 : 63.6 nmol/l) and Canadian populations (median 25(OH)D: 63.8 nmol/l) [16].…”

Vitamin D deficiency 2.0: an update on the current status worldwide

“…Prevalence rates of severe vitamin D deficiency, defined as 25(OH)D <30 nmol/L (or 12 ng/ml), of 5.9% (US) [18], 7.4% (Canada) [19], and 13% (Europe) [2] have been reported. Estimates of the prevalence of 25(OH)D levels <50 nmol/L (or 20 ng/ml) have been reported as 24% (US), 37% (Canada), and 40% (Europe) [2,[17][18][19].…”

“…Prevalence rates of severe vitamin D deficiency, defined as 25(OH)D <30 nmol/L (or 12 ng/ml), of 5.9% (US) [18], 7.4% (Canada) [19], and 13% (Europe) [2] have been reported. Estimates of the prevalence of 25(OH)D levels <50 nmol/L (or 20 ng/ml) have been reported as 24% (US), 37% (Canada), and 40% (Europe) [2,[17][18][19]. This may vary by age, with lower levels in childhood and the elderly [17], and also ethnicity in different regions, for example, European Caucasians show lower rates of vitamin D deficiency compared with nonwhite individuals [2,17].…”

The Relationship between 25-hydroxyvitamin D Levels, Insulin Sensitivity and Insulin Secretion in Women 3 Years after Delivery

“…Osteopathy and other chronic conditions such as autoimmune diseases, diabetes, metabolic syndrome, multiple sclerosis and certain malignancies are associated with low levels of 25-hydroxyvitamin D. [1][2][3][4][5] 25-hydroxyvitamin D deficiency is rather common, recent studies reported a prevalence of 77% in the United States, 37% in Canada, and 50-70% in European populations. [6,7] An association between 25-hydroxyvitamin D levels and insulin sensitivity regardless of body mass index (BMI)/obesity is suggested by several studies, mostly in populations with an increased risk of diabetes. [2,[8][9][10][11] In a randomized, controlled trial among subjects with a high risk of diabetes, oral supplementation of vitamin D prevented the deterioration of insulin sensitivity in the short term.…”