Table 5—

Relations between lung function and carbon monoxide level on the previous day(lag 1) in bi-pollutant and multi-pollutant models#

β±semp-valueChange per 1 mg·m−3 CO %
Morning PEF
 All pollutants-10.70±4.150.01-3.27
Evening PEF
 All pollutants-9.18±4.890.06-2.72
Morning FEV1
 All pollutants-0.03±0.030.34-1.18
Evening FEV1
 All pollutants-0.05±0.040.22-2.19
  • β: regression coefficient from generalised estimating equation models for panel data, controlling for temperature, relative humidity, atmospheric pressure, corticosteroid use and smoking habit (changes for 1 mg·m−3 increase in pollutant concentration); PEF: peak expiratory flow; PM10: particles with a 50% cut-off aerodynamic diameter of 10 μm; FEV1: forced expiratory volume in 1 s. Bold values represent significant results. #: after adjustment for the various pollutants indicated.