Effects of the dynamic change of body mass index and waist circumference on the blood pressure of elder hypertensive patients

Objective:To explore the effects of the dynamic change of body mass index(BMI) and waist circumference(WC) during 1-year follow-up on the blood pressure of elder hypertensive patients.Methods:The data of 60 to 75 years old 220 patients with hypertension was collected using questionnaire and body measurement, the same data were collect after 1 year again.The two times of blood pressure value were compared.The patients were divided into the blood pressure increasing group and blood pressure decreasing group according to the blood pressure level.The BMI and WC between two groups were compared.Results:Among the male patients, the rates of smoking and drinking in blood pressure increasing group were significantly higher than those in blood pressure decreasing group(P<0.01), but the exercise in blood pressure increasing group was less(P<0.01).Among the female patients, the differences of the rates of smoking and drinking between two groups were not statistically significant(P>0.05), but the exercise in blood pressure increasing group was less than that in blood pressure increasing group(P<0.01).Compared with the first value of BMI and WC in the blood pressure increasing group, the second value increased significantly(P<0.01).Compared with the first value of BMI and WC in the blood pressure decreasing group, the second value decreased significantly(P<0.01).The differences of systolic and diastolic blood pressure, BMI and WC between times measurement were positive correlation, respectively(P<0.01).Conclusions:The blood pressure increasing in elder hypertensive patients is related to the smoking, drinking and less exercise.The dynamic changes of MBI and WC are postively associated with hypertension.