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Table 2 Excess risk and 95% confidence intervals of emergency ambulance dispatches for each 10 μg/m3 increment in PM pollution at lag03 in single and two-pollutant models in Guangzhou

From: Relationship between different particle size fractions and all-cause and cause-specific emergency ambulance dispatches

Pollutants Models All-cause Cardiovascular Respiratory
PM2.5
  Single pollutant model 0.98 (0.67, 1.28) 0.69 (0.00, 1.39) 1.14 (0.25, 2.04)
  Two-pollutant models    
  Control for NO2 0.46 (0.09, 0.83) 0.07 (− 0.78, 0.92) 1.21 (0.12, 2.31)
  Control for O3 1.11 (0.79, 1.44) 0.74 (0.00, 1.49) 1.35 (0.40, 2.31)
  Control for SO2 0.96 (0.65, 1.27) 0.61 (− 0.10, 1.33) 1.03 (0.12, 1.94)
PM2.5–10
  Single pollutant model 2.06 (1.44, 2.68) 2.04 (0.64, 3.45) 2.52 (0.72, 4.35)
  Two-pollutant models    
  Control for NO2 1.05 (0.30, 1.79) 1.07 (−0.64, 2.81) 2.82 (0.60, 5.10)
  Control for O3 2.26 (1.61, 2.91) 2.17 (0.70, 3.66) 2.89 (0.99, 4.82)
  Control for SO2 2.03 (1.40, 2.66) 1.89 (0.47, 3.34) 2.29 (0.45, 4.15)
PM10
  Single pollutant model 0.75 (0.53, 0.96) 0.60 (0.11, 1.10) 0.89 (0.25, 1.52)
  Two-pollutant models    
  Control for NO2 0.38 (0.12, 0.65) 0.18 (−0.44, 0.80) 1.02 (0.22, 1.83)
  Control for O3 0.85 (0.62, 1.08) 0.65 (0.13, 1.18) 1.05 (0.38, 1.73)
  Control for SO2 0.74 (0.52, 0.96) 0.55 (0.04, 1.05) 0.80 (0.16, 1.45)