Vitamin B6 deficiency and diseases in elderly people--a study in nursing homes.

Background: Vitamin deficiency is a cause of health related problems in elderly people. The aims were to study associations between vitamin B6 (B6) and diseases (primarily functional gastrointestinal disorders) in elderly people in nursing homes, the prevalence of B6 deficiency and factors associated with B6 deficiency.

Methods: This cross-sectional study included residents in nursing homes.