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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