Associations between age, cohort, and urbanization with SBP and DBP in China: a population-based study across 18 years.

Published

Journal Article

Little is known about whether large-scale environmental changes, such as those seen with urbanization, are differentially associated with SBP versus DBP, and whether those changes vary by birth cohort.We used data from the China Health and Nutrition Survey, a population-based cohort study of Chinese adults (n = 18 754 aged 18-70 years), seen a maximum of seven times from 1991 to 2009. We used hierarchical multivariable linear models to simultaneously estimate SBP and DBP as correlated outcomes over time, accounting for their physiologic, time-varying correlation. Main exposure variables were urbanicity, age, and birth cohort. Over 18 years of modernization, median SBP and DBP increased by 10 and 7 mmHg, respectively.Our hierarchical model results suggest greater temporal increases in SBP and particularly DBP at lower versus higher urbanicity. At the same chronological age, for a 10-year difference in birth cohort (i.e. born in 1980s versus 1970s), the adjusted mean DBP was approximately 3 mmHg higher for the later birth cohort (P < 0.001). Pulse pressure (calculated as model-predicted SBP minus DBP) was also higher at low versus high urbanicity.These results suggest increased susceptibility of DBP (and thus peripheral vascular resistance) to environmental change, particularly in younger Chinese adults. Because DBP more strongly predicts cardiovascular disease risk in younger adulthood, hypertension-related health burden in China may increase over time.

Full Text

Cited Authors

  • Attard, SM; Herring, AH; Zhang, B; Du, S; Popkin, BM; Gordon-Larsen, P

Published Date

  • May 2015

Published In

Volume / Issue

  • 33 / 5

Start / End Page

  • 948 - 956

PubMed ID

  • 25668349

Pubmed Central ID

  • 25668349

Electronic International Standard Serial Number (EISSN)

  • 1473-5598

International Standard Serial Number (ISSN)

  • 0263-6352

Digital Object Identifier (DOI)

  • 10.1097/HJH.0000000000000522

Language

  • eng