Table 2 RR (95% CI) for 10‐unit increase in pollutant (1 unit for carbon monoxide), for all infant deaths, and by neonatal and post‐neonatal deaths. Only mean effects are presented. Pollutant measure was presented as an average of lags 0–2 days.

	CO	NO	NO2	O3	PM10	SO2
All infant deaths	1.02 (0.96 to 1.09)	1.00 (0.99 to 1.01)	1.00 (0.99 to 1.02)	1.00 (0.98 to 1.03)	0.99 (0.97 to 1.01)	1.02 (1.01 to 1.04)
Neonatal deaths	0.99 (0.92 to 1.07)	1.00 (0.99 to 1.01)	1.00 (0.98 to 1.02)	0.99 (0.96 to 1.02)	0.99 (0.97 to 1.02)	1.02 (1.00 to 1.04)
Post neonatal deaths	1.09 (0.94 to 1.25)	1.00 (0.99 to 1.01)	1.01 (0.98 to 1.04)	0.99 (0.92 to 1.06)	0.99 (0.95 to 1.03)	1.03 (0.98 to 1.08)

CO, carbon monoxide; NO, nitrogen oxide; NO₂, nitrogen dioxide; O₃, ozone; PM₁₀, particulate matter <10 μg/m³; SO₂, sulphur dioxide.