Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Plot of province residuals with 95% CIs for sensitivity of self-reported hypertension, China Health and Retirement Longitudinal Study, 2011–2012 (sequencing from left to right: Guizhou, Guangdong, Guangxi, Yunnan, Hubei and Sichuan tagged by ‘-’; Anhui, Zhejiang and Beijing tagged by ‘×’; Heilongjiang ,Tianjin and Shanghai tagged by ‘△’. Three separate colours—red, black and green—indicating provinces located in the Eastern zone, Central zone and Western zone, respectively).
