Results from the European Union MAPEC_LIFE cohort study on air pollution and chromosomal damage in children: are public health policies sufficiently protective?

Environmental Sciences Europe

Table 4 Analysis of the associations between MN frequency and air pollutant levels. For each compound, 21-day peak value and 15- to 21-day mean value are reported

Air pollutant	Air pollutant measures	IRR	95% CIs		P value
PM10	21-day peak value	1.003	1.000	1.005	0.042
PM10	15- to 21-day mean value	1.002	0.997	1.008	0.409
PM2.5	21-day peak value	1.005	1.000	1.009	0.049
PM2.5	15- to 21-day mean value	1.010	1.001	1.019	0.027
Benzene	21-day peak value	1.000	0.995	1.006	0.862
Benzene	15- to 21-day mean value	1.189	1.022	1.384	0.025
NO₂	21-day peak value	0.999	0.996	1.002	0.490
NO₂	15- to 21-day mean value	0.998	0.990	1.006	0.593
SO₂	21-day peak value	1.002	1.000	1.004	0.011
SO₂	15- to 21-day mean value	1.041	0.998	1.084	0.060
O^a₃	21-day peak value	1.014	1.007	1.022	< 0.001
O^a₃	15- to 21-day mean value	0.999	0.987	1.010	0.798

The Incidence Rate Ratio (IRR), 95% Confidence Intervals (95% CIs) and p value are shown
^aFor O₃, taking into account its specific seasonal trend, the Poisson model was performed including a cubic spline for the day of the year (seasonality) rather than temperature. All the associations were assessed including town of residence, temperature, child BMI and adherence to Mediterranean diet, exposure to second-hand smoke at home, having graduated mother and father in the model as potential confounders