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Table 3 Effects of concentrations of ambient air pollutants on preterm delivery

From: Ambient air pollution and adverse birth outcomes: a natural experiment study

Concentration of ambient air pollutant

NO2 (per 10 ug/m3)

PM10 (per 10 ug/m3)

Single pollutant model

Multi-pollutant model

Single pollutant model

Multi-pollutant model

OR (95 % CI)

P-value

AOR (95 % CI)

P-value

OR (95 % CI)

P-value

AOR (95 % CI)

P-value

1st trimester

0.98 (0.89, 1.08)

0.732

0.93 (0.70, 1.25)

0.645

0.98 (0.94, 1.02)

0.258

1.00 (0.92, 1.08)

0.992

2nd trimester

0.94 (0.87, 1.02)

0.141

0.22 (0.68, 1.08)

0.194

0.96 (0.91, 1.00)

0.074

0.97 (0.88, 1.08)

0.597

3rd trimester

1.01 (0.89, 1.15)

0.897

0.96 (0.72, 1.29)

0.805

0.98 (0.94, 1.02)

0.299

1.01 (0.90, 1.12)

0.923

  1. OR odds ratio, AOR adjusted odds ratio