Table 3

Associations of other air pollutants with emergency ambulance dispatches

 All causes (n=176 123)Respiratory diseases (n=15 857)Cardiovascular diseases (n=31 837)
OR*95% CIOR*95% CIOR*95% CI
NO2 (per 10 ppb)
 Lag0–11.0050.993 to 1.0171.0320.993 to 1.0720.9890.963 to 1.016
 Lag2–31.0010.988 to 1.0141.0471.005 to 1.0910.9960.967 to 1.026
 Lag4–61.0050.992 to 1.0190.9960.953 to 1.0400.9910.961 to 1.022
Ox (per 10 ppb)
 Lag0–11.0050.999 to 1.0111.0110.991 to 1.0301.0040.990 to 1.018
 Lag2–31.0040.998 to 1.0101.0050.984 to 1.0260.9970.983 to 1.012
 Lag4–60.9980.992 to 1.0041.0090.988 to 1.0300.9940.979 to 1.008
SO2 (per 10 ppb)
 Lag0–11.0260.973 to 1.0811.0950.924 to 1.2971.0010.886 to 1.132
 Lag2–31.0160.961 to 1.0741.1961.001 to 1.4290.9790.862 to 1.113
 Lag4–61.0350.976 to 1.0971.0350.855 to 1.2531.0280.898 to 1.177
  • *We entered the average concentrations of each pollutant during lag0-lag1 (lag0–1), during lag2-lag3 (lag2–3) and during lag4-lag6 (lag4–6) simultaneously in the model, and also controlled for 4-day average ambient temperature and relative humidity.

  • NO2, nitrogen dioxide; Ox, photochemical oxidants; SO2, sulfur dioxide.