Table 5.

The RR and percent change of eczema risk associated with 10 mg/m³ increase of PM_2.5 and PM₁₀ under two-pollutant model.

Pollutant (per 10 mg/m3)	Model type	RR	PC (%)
${\text{PM}}_{2.5}^{*}$	PM2.5 + PM10	1.0129 (1.0113–1.0145)	1.29 (1.13–1.45)
	PM2.5 + NO2	1.0201 (1.018–1.0223)	2.01 (1.8–2.23)
	PM2.5 + SO2	1.0254 (1.0223–1.0285)	2.54 (2.23–2.85)
	PM2.5 + O3	1.0146 (1.0129–1.0163)	1.46 (1.29–1.63)
${\text{PM}}_{10}^{*}$	PM10 + NO2	1.0175 (1.0158–1.0192)	1.75 (1.58–1.92)
	PM10 + SO2	1.0234 (1.021–1.0258)	2.34 (2.1–2.58)
	PM10 + O3	1.014 (1.0125–1.0154)	1.4 (1.25–1.54)

^*P < 0.001.

RR, risk ratio; PC, percentage change.