Table 4. Measures of associations and p-value (or 95% confidence interval) for 10μg/m³ increase in concentrations of air pollutants by trimesters of pregnancy from regression models (defined as model 1 in §Material and methods) adjusted for individual covariates for boys.

		BOYS
		Birth weight		Low birth weight		Term low birth weight
Air pollutants	Window of exposure	β	p-value	OR	[CI95%]	OR	[CI95%]
NO2	Entire pregnancy	-2.6	0.261	1.07	[0.99;1.015]	1.05	[0.97;1.17]
	T1	0.2	0.933	1.05	[0.98;1.13]	1.05	[0.97;1.14]
	T2	-2.6	0.212	0.97	[0.89;1.04]	0.93	[0.85;1.02]
	T3	0.3	0.859	1.07	[1.00;1.14]3	1.10	[1.02;1.19]5
PM10	Entire pregnancy	-15.4	0.0341	1.23	[0.99;1.6]	1.24	[0.93;1.72]
	T1	-9.2	0.0402	1.15	[0.99;1.37]	1.11	[0.91;1.36]
	T2	-2.7	0.504	0.98	[0.85;1.14]	1.0	[0.83;1.20]
	T3	-5.4	0.220	1.17	[1.01;1.32] 4	1.19	[1.01;1.39]6

Adjusted on: maternal age, gestational age, woman’s primary maternity (yes or no), and maternity classification (class I: low risk, class II: moderate risk and class III: high risk).

¹: Controlling the False discovery rate (FDR) at α = 0.05 following the method of Benjamini & Hochberg [18], FDR α-risk = 0.007;

²: FDR α-risk = 0.009;

³FDR α-risk = 0.01;

⁴FDR α-risk = 0.006;

⁵FDR α-risk = 0.001;

⁶FDR α-risk = 0.01 [18].

Bold character presents significant result at 5%. Bold and italic character presents significant result at FDR-risk; Ref: referent value. β corresponds to regression coefficient of a linear regression; OR: Odds Ratio. NO₂: Nitrogen dioxide. PM₁₀: Particulate matter < 10 μm in aerodynamic diameter.