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. 2015 Dec 16;144(4):1186–1192. doi: 10.1378/chest.12-2414

Table 4.

RR of Exacerbation of Cystic Fibrosis Associated With an IQR of PM10, O3, NO2, SO2, and CO

Lag RR (95% CI)
PM10 (IQR = 22.33 μg/m3) O3 (IQR = 45.62 μg/m3) NO2 (IQR = 44.43 μg/m3) SO2 (IQR = 5.5 μg/m3) CO (IQR = 0.81 ppm)
Lag0 1.13 (0.62–2.06) 1.34 (0.92–1.94) 1.26 (0.76–2.09) 0.98 (0.58–1.67) 1.01 (0.76–1.33)
Lag1 0.92 (0.51–1.67) 1.48 (0.94–2.33) 1.36 (0.84–2.19) 1.09 (0.59–2.01) 0.90 (0.66–1.23)
Lag2 1.20 (0.74–1.97) 1.86 (1.14–3.02) 1.61 (0.94–2.78) 1.53 (0.78–2.99) 1.10 (0.76–1.59)
Lag3 0.81 (0.50–1.32) 1.20 (0.76–1.92) 1.01 (0.63–1.61) 0.87 (0.47–1.60) 1.02 (0.76–1.38)
Lag4 0.86 (0.52–1.44) 1.26 (0.78–2.01) 1.29 (0.72–2.33) 0.78 (0.44–1.38) 0.94 (0.71–1.24)
Lag5 0.90 (0.58–1.41) 1.22 (0.75–1.98) 1.10 (0.70–1.73) 1.07 (0.63–1.84) 0.99 (0.75–1.32)
Lag6 0.95 (0.65–1.40) 1.24 (0.72–2.11) 1.13 (0.66–1.93) 1.28 (0.73–2.25) 1.00 (0.81–1.23)

Lag n = No. days after exposure; RR = relative risk. See Table 1, Table 2 legends for expansion of other abbreviations.