Table 3 Percent change (95% CI) in children hospital outpatients caused by respiratory diseases per 10 μg/m3 increase in concentrations of five air pollutants stratified by season and age in Shijiazhuang, China, 2013–2015

0.17(− 0.44, 0.78)^b

0.71(− 0.65, 2.06)

1.47 (0.69, 2.25) ^b

0.22(− 0.14, 0.59)^d,e

1.59 (0.86, 2.31) ^d

2.39 (1.38, 3.39) ^e

− 3.47(−4.38, −2.55)^a,b

0.26(− 0.16, 0.67)^a

0.54 (0, 1.07) ^b

0.05(− 0.27, 0.37)^d

0.78 (0.16, 1.40) ^d

0.11(− 0.75, 0.98)

0.02(− 0.09, 0.14)^b

−0.08(− 0.36, 0.2)^c

0.24 (0.09, 0.39) ^b,c

−0.03(− 0.10, 0.04)^d,e

0.19 (0.05, 0.34) ^d

0.27 (0.07, 0.47) ^e

0.16(−0.01, 0.33)

−0.1(− 0.54, 0.35)

0.32 (0.02, 0.62)

0.06(− 0.05, 0.17)

0.30 (0.08, 0.53)

0.38 (0.07, 0.68)

−0.05(− 0.39, 0.29)^a,b

2.09 (0.99, 3.2) ^a

1.05 (0.42, 1.68) ^b

0.26 (0.03, 0.49)

0.38(−0.08, 0.84)

0.83 (0.19, 1.47)