Skip to main content

Table 4 Excess risks (ERs) and 95% confidence intervals (CIs) of daily preterm birth in two-pollutant models

From: Association between ambient air pollutants and preterm birth in Ningbo, China: a time-series study

  Two-pollutant modelsa ERs and 95% CIs
PM2.5 4.84 (1.77, 8.00)
NO2 3.44 (−0.47, 7.50)
SO2 3.70 (−0.02, 7.52)
PM10 3.56 (0.07, 7.17)
NO2 0.42 (−4.13,5.20)
SO2 1.15 (−3.21, 5.69)
SO2 3.65 (0.86, 6.51)
PM2.5 1.69 (−1.55, 5.08)
PM10 3.09 (−0.41, 6.72)
NO2 2.18 (−1.07,5.52)
NO2 6.49 (1.86, 11.34)
PM2.5 3.09 (−3.61, 9.11)
PM10 6.11 (−0.03,12.62)
SO2 4.55 (−0.80, 10.18)
  1. PM2.5: particulate matter less than 2.5 μm in aerodynamic diameter, PM10: particulate matter less than 10 μm in aerodynamic diameter, SO2: sulfur dioxide, NO2: nitrogen dioxide
  2. aLag day 3 for PM2.5, PM10, NO2, SO2 were used
\