Skip to main content
Figure 4 | Environmental Health

Figure 4

From: Air pollution and emergency department visits for cardiac and respiratory conditions: a multi-city time-series analysis

Figure 4

Percent increase in emergency department visits for selected pollutants, diagnostic groups per mean pollutant concentration. (Point estimates and 95% confidence intervals are shown by number of knots in natural spline functions of time; from left to right, base analysis where number of knots is optimized separately in each city, and knots every 3, 5 and 17 weeks).

Back to article page

Environmental Health

ISSN: 1476-069X