Table 3 Odds ratios of bivariate associations between asthma without hayfever and both NO₂LUR and confounding variables within subgroups of all, younger and older children⁺

1.035

(0.957–1.120)

0.989

(0.889–1.101)

1.100

(0.980–1.234)

0.780

(0.479–1.268)

0.879

(0.470–1.641)

0.591

(0.270–1.296)

0.959

(0.905–1.016)

0.971

(0.903–1.043)

0.932

(0.844–1.029)

1.008

(0.968–1.050)

0.983

(0.930–1.039)

1.012

(0.950–1.077)

1.002

(0.996–1.009)

0.999

(0.991–1.007)

1.005

(0.996–1.015)

1.013

(0.987–1.041)

1.002

(0.970–1.035)

1.009

(0.967–1.052)

1.029

(0.962–1.102)

1.020

(0.925–1.125)

1.047

(0.946–1.160)