Study on the relationship between hypertention and dietary micronutrients intake condition of urban and rural residents in Tianjin

Objective To analyze the relationship between hypertention and dietary micronutrients intake condition of urban and rural residents in Tianjin in order to provide information and basis for the strategy of improving nutrition condition and preventing hypertention in population.Methods The monitoring data of Chinese residents' nutrition and health condition from 2010 to 2012 were collected; the food record using successive 3 days 24 hours dietary retrospective method and seasoning weight method.Results The standard intake of Tianjin residents per people per day was respectively as follows: vitamin A 313.79 μg, vitamin C 85.05 mg, vitamin E 27.91 mg, vitamin B₁ 0.81 mg, vitamin B₂ 0.86 mg, nicotinic acid 13.24 mg, calcium 410.85 mg, sodium 6 613.17 mg, kalium 1 735.10 mg, iodine 282.83 μg, iron 22.21 mg, zinc 10.37 mg; the dietary intake of vitamin A, B₁, B₂ and calcium was lower than the recommended value and the intake of soldium was obviously exceeding; the intake of micronutrients except soldium and the total iodine the intake of which is higher in rural is the lowest in rural; in hypertention patients, the dietary intake of kalium, calcium, magneslium, cuprum, selenium, vitamin A and C, thiamine, riboflavin was negatively related to blood pressure(all P< 0.05), while it was positively related in reference to sodium and iodine intake(all P< 0.05); in hypertention patients, the sodium and iodine intake was both obviously higher than that in control group and also than the recommended nutrient intake while the intake of other micronutrients was all lower than that in control group(all P< 0.05).Conclusions The insufficiency of intake of micronutrients including vitamin A, B₁, B₂ and calcium in Tianjin residents is the major problem. The intake of sodium is obviously nimiety; the insufficiency of kinds of micronutrients is more serious in rural area; various micronutrients are related to hypertention and it's time to take nutrition-improving measures to intervene hypertention by diet.