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.
Operative stone burden across the state of California and days over 90° and temperature variation. Each map shows the variables' relative magnitude for each county in California. The adjacent scatter plots compare the variable to county operative stone burden per 1000 persons. The fitted univariate regression line is also included on the scatter plots. There was no significant association between stone burden and number of days over 90° (p = 0.41) and temperature variance (p = 0.23).
