Table 2.
Prevalence of vitamin D deficiency in white Caucasians compared to a UK survey
| n | Vitamin D | |||
|---|---|---|---|---|
| <25 nmol/l | <40 nmol/l | <75 nmol/l | ||
| DST/Winter | ||||
| Current Audit | 119 | 21 (17·6%) | 63 (52·9%) | 108 (90·8%) |
| UK Survey | 2850 | 441 (15·5%) | 1328 (46·6%) | 2482 (87·1%) |
| Chi Statistic | 0·41 | 1·85 | 2·76 | |
| P Value | 0·52 | 0·17 | 0·097 | |
| BST/Summer | ||||
| Current Audit | 142 | 5 (3·5%) | 31 (21·8%) | 100 (70·4%) |
| UK Survey | 4587 | 147 (3·2%) | 706 (15·4%) | 2793 (60·9%) |
| Chi Statistic | 0·044 | 4·34 | 5·27 | |
| P Value | 0·83 | 0·037 | 0·022 | |
Prevalence of vitamin D status in current audit (for white Caucasians only) was compared using chi‐squared test to UK survey data for white Caucasians reported by Hypponen E and Power C. Hypovitaminosis D in British adults at age 45 year: nationwide cohort study of dietary and lifestyle predictors. Am J Clin Nutr 2007 85:860–868.
Abbreviations: BST, British Summer Time; DST, Daylight Saving Time; UK, United Kingdom.
To convert vitamin D concentrations from nmol/l to ng/ml divide by 2·496. P values in bold text indicate statistically significant results.