Abstract: Objective: The objective of the present study was to examine knowledge on vitamin D and calcium in a cohort of older adults and to test the association between health knowledge, vitamin D status and dietary calcium intake. Methods: The participants of this cross-sectional survey consisted of 426 individuals (≥65 years), living in residential homes. Participants were tested for their knowledge on vitamin D and calcium using a standardized questionnaire. Serum 25-hydroxyvitamin D3 (25(OH)D3) levels and dietary calcium intake were measured. Results: The mean serum 25(OH)D3 level was 39.1 (±21.4) nmol/l and the mean daily dietary calcium intake was 826 (±242) mg/day. Of the participants, only 38 per cent indicated that they knew or had heard of vitamin D. Participants overestimated their daily calcium intake. Better knowledge on vitamin D and calcium was associated with both higher vitamin D levels (P < 0.0001) and a higher daily dietary calcium intake (P < 0.0001). Conclusion: Given the poor knowledge on vitamin D and calcium and the observed associations, improving health knowledge could be a possible intervention to improve vitamin D status and calcium intake in older people. Further studies are needed to assess whether education will indeed lead to improvement of vitamin D levels and calcium intake in this age group.

Additional Metadata
Keywords calcium intake, geriatrics, health knowledge, prevention, vitamin D3, prevention, vitamin D3
Persistent URL dx.doi.org/10.1177/0017896911406965, hdl.handle.net/1765/30980
Citation
Oudshoorn, C, Hartholt, K.A, van Leeuwen, J.P.T.M, Colin, E.M, van der Velde, N, & van der Cammen, T.J.M. (2011). Better knowledge on vitamin D and calcium in older people is associated with a higher serum vitamin D level and a higher daily dietary calcium intake. Health Education Journal, 2011, 1–9. doi:10.1177/0017896911406965