Long-term air pollution levels modify the relationships between short-term exposure to meteorological factors, air pollution and the incidence of hand, foot and mouth disease in children: a DLNM-based multicity time series study in Sichuan Province, China

Table 2 Quantitative statistics indicate that long-term air pollution levels significantly modify the relationships of HFMD incidence with short-term exposure to meteorological factors and air pollution, according to the multivariate meta-regression analysis

Exposure	Modifier	LR test			Cochran Q test		Model fit	Heterogeneity
Exposure	Modifier	Test statistic	df	P value	Q	df	AIC	I²	ΔI²
Mean temperature	SO₂	8.394	3	0.039	90.742	57	195.572	37.2	-3.1
	CO	9.162	3	0.027	86.873	57	194.804	34.4	-5.9
	SO₂ + NO₂	16.809	6	0.010	74.517	54	193.158	27.5	-12.8
	Reference	-	-	-	100.513	60	197.966	40.3	0
Relative humidity	SO₂	9.481	3	0.024	113.733	57	187.55	49.9	-1.7
	Reference	-	-	-	124.026	60	191.031	51.6	0
Wind speed	CO	8.123	3	0.044	122.983	57	242.044	53.7	-1.6
	PM₁₀ + CO + Per_GDP	21.63	9	0.010	98.559	51	240.537	48.3	-7
	Reference	-	-	-	134.348	60	244.167	55.3	0

ISSN: 1471-2458