Table 3.

The combined effects of three air pollutants on mortality by age, sex and educational attainment, estimated by the tensor product model

	Deaths (%)	ERa (95%CI)
Age (years)
< 65 years	47,303(24.4)	−1.09 (− 2.81–0.66)
≥ 65 years	146,412(75.4)	3.71 (1.96–5.50)
Gender
Female	84,519(43.6)	3.58 (1.47–5.74)
Male	109,916(56.4)	1.50 (0.05–2.99)
Educational attainment
Low	170,629(92.6)	2.82 (1.19–4.49)
High	13,734(7.4)	2.19 (−1.11–5.60)

^aThe excess risk (ER) of all-cause mortality associated with an IQR increment of concentrations of three pollutants