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  • Title: [Relationship between birth weight and elevated blood pressure among children aged 6-11 years in China].
    Author: Zhai Y, Li W, Shen C, Zhao W, Shi X.
    Journal: Zhonghua Er Ke Za Zhi; 2014 Jan; 52(1):11-5. PubMed ID: 24680402.
    Abstract:
    OBJECTIVE: To analyze the relationship between birth weight and elevated blood pressure among schoolchildren aged 6-11 years in 8 provinces of China. METHOD: A stratified random cluster sampling was used from sampling frame of eight provinces in the mainland of China. A total of 18 920 students aged 6-11 years eventually participated in this study. Height, weight, waist circumference (WC) and blood pressure of all the subjects were measured. Korotkoff I and V were recorded as systolic blood pressure (SBP) and diastolic blood pressure (DBP). Elevated blood pressure was considered for SBP and/or DBP equal to or above the reference sex-, age- and height-specific 95th percentile. Birth weight and family history of hypertension were collected by self-administered questionnaire. Analysis of variance was used to compare body measure indicators among 3 birth weight groups. Multivariate Logistic regression analysis was performed to identify the relationship between birth weight, current BMI and elevated blood pressure among children. RESULT: The level of height, weight, WC, BMI, SBP and DBP were on the rise with the increase of the birth weight groups among boys (P < 0.05), except for WC among boys aged 6-8 years. The level of height, weight, WC, BMI and DBP showed a trend of escalation among girls (P < 0.05). But, SBP among 3 birth weight groups in girls was not significantly different (P = 0.099). After adjusting for age and family history of hypertension, compared with the normal birth weight group, the odds ratio and 95%CI of having elevated blood pressure among boys and girls in high birth weight group were 1.23 (1.06-1.43) and 0.89 (0.71-1.10), respectively; and the ORs(95%CI) were 1.06 (0.90-1.24) for boys and 0.73 (0.58-0.91) for girls after adjusting for age, family history of hypertension and current BMI of students. The relative risk of elevated blood pressure for boys and girls in low birth weight group were not significantly different as compared with normal birth weight group. CONCLUSION: Current BMI but not birth weight was found to be a strong determinant of elevated blood pressure among children aged 6-11 years in China.
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