Figure 3From: Gaseous air pollution and emergency hospital visits for hypertension in Beijing, China: a time-stratified case-crossover study The association between a 10 ug/m 3 increase in NO 2 and daily emergency hospital visits for hypertension at lag days 0 to 5 in single pollutant and multiple pollutants models (time-stratified case-crossover controlling temperature and relative humidity).Back to article page