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Table 2 Excess risk of mortality and 95% confidence intervals (%) associated with an IQR increment in air pollutant concentrations

From: A tensor product quasi-Poisson model for estimating health effects of multiple ambient pollutants on mortality

Modela PM10 NO2 SO2 Combined effects
I 2.03 (1.08–2.99) 1.63 (0.69–2.59) 1.86 (0.94–2.78) 5.63 (3.96–7.34)
II 1.98 (0.23–3.77) − 1.24 (− 3.24–0.81) 1.47 (−0.10–3.07) 2.20 (1.18–3.23)
III 1.35 (− 1.11–3.88) − 0.49 (− 3.51–2.61) 2.46 (− 0.11–5.10) 2.78 (1.35–4.23)
IV 1.45 (− 0.33–3.27) 0.53 (− 1.42–2.52) 0.92 (−0.65–2.52) 2.53 (1.03–4.01)
  1. aModel I, II, III and IV denote the single-pollutant model, the three-pollutant non-interaction model, the three-pollutant interaction model and the tensor product model, respectively