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Table 2 Threshold levels

From: Grass pollen allergy in children and adolescents-symptoms, health related quality of life and the value of pollen prognosis

Symptom

Threshold level

Pollen grain per cubic metre level

OR (95% CI)

P-value

Nose

Sweden

Low–Medium

0.98(0.84–1.13)

0.74

  

Medium–High

1.42(1.19–1.69)

<0.0001

  

High–Very high

1.24(1.07–1.44)

0.0049

 

Britain/Denmark

Low–Medium

1.18(1.02–1.37)

0.026

  

Medium–High

1.37(1.16–1.61)

0.0002

  

High–Very high

1.04(0.88–1.24)

0.64

 

Traffic lights

Low–Medium

1.40(1.19–1.65)

<0.0001

  

Medium–High

1.19(1.02–1.40)

0.027

Eye

Sweden

Low–Medium

1.02(0.89–1.18)

0.77

  

Medium–High

1.34(1.10–1.61)

0.028

  

High–Very high

1.30(1.14–1.48)

<0.0001

 

Britain/Denmark

Low–Medium

1.12(0.96–1.31)

0.15

  

Medium–High

1.38(1.17–1.62)

<0.0001

  

High–Very high

1.30(1.09–1.56)

0.0038

 

Traffic lights

Low–Medium

1.33(1.13–1.56)

0.0007

  

Medium–High

1.30(1.14–1.48)

<0.0001

Lung

Sweden

Low–Medium

0.92(0.76–1.10)

0.35

  

Medium–High

1.10(0.89–1.35)

0.39

  

High–Very high

1.27(1.13–1.43)

<0.0001

 

Britain/Denmark

Low–Medium

0.95(0.83–1.10)

0.51

  

Medium–High

1.21(1.03–1.43)

0.020

  

High–Very high

1.20(1.01–1.42)

0.041

 

Traffic lights

Low–Medium

1.02(0.85–1.23)

0.82

  

Medium–High

1.27(1.12–1.45)

0.0003

Total

Sweden

Low–Medium

1.04(0.91–1.18)

0.57

  

Medium–High

1.35(1.15–1.59)

0.0003

  

High–Very high

1.25(1.11–1.42)

0.0004

 

Britain/Denmark

Low–Medium

1.14(1.00–1.29)

0.046

  

Medium–High

1.39(1.20–1.62)

<0.0001

  

High–Very high

1.14(0.96–1.35)

0.12

 

Traffic lights

Low–Medium

1.36(1.18–1.58)

<0.0001

  

Medium–High

1.25(1.10–1.42)

0.0008