1. Department of Clinical Nutrition,Isfahan University of Medical Sciences, Isfahan, Iran 2. Department of Clinical Nutrition,shiraz University of Medical Sciences, shiraz, Iran
Population studies have demonstrated that there is an inverse association between dietary intake of vitamin d and incidence of hypertension. as regard to the high prevalence of hypertension which affected by various factors such as dietary care among elderlies, we investigated the relation between vitamin d intake and hypertension in elderlies with health care.
Based on the case-control design, this study was conducted on 152 elderlies with and without health care in primary care centers. assessment of the dietary intake of nutrients was done by an expert dietitian by using food frequency questionnaire (ffq) and n4 software analyzer. also, mean of the blood pressure was extracted from participant files. the independent sample-t test, multiple linear regression and ancova test were used to analysis data.
Overall, significant negative relation was observed between vitamin d intake and systolic blood pressure in all participants (p=0.028, r -0.178). dietary intake of vitamin d was significantly higher than control (p=0.028) while blood pressure was significantly lower than control group (p=0.007). base on the sexuality in case group, dietary intake of vitamin d was significantly higher in women than men (p=0.010), but blood pressure was not significantly different.
Our findings showed that there is a negative association between vitamin d intake and the incidence of blood pressure in elderlies. health caring can improve dietary intake of vitamin d and as a result it can reduce blood pressure of elderlies.