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Table 1 Characteristics of source population divided into the lowest and highest FEF 50% tertile

From: Development of a tool to recognize small airways dysfunction in asthma (SADT)

 

Lowest FEF50%tertile

Highest FEF50%tertile

(n= 398)

(N= 491)

Age (years)

54

(12)

48

(13)

Gender (%female)

72

 

62

 

BMI (kg/m2)

28

(5)

29

(6)

Smoking (%current/ex/never )

26/37/37

 

15/42/43

 

ICS (%yes)

53

 

50

 

FEV1 (%predicted)

89

(9.8)

109

(12)

FEV1/FVC (%)

70

(5.7)

83

(4.3)

FEF50% (%predicted)

51

(9.9)

104

(17)

ACQ total score

1.3

(0.9)

1.2

(0.9)

  1. Data presented as mean (SD) or percentage.
  2. BMI= body mass index, ICS= inhaled corticosteroids, FEV1= Forced expiratory flow in one second, FVC= forced vital capacity, FEF50%= forced expiratory flow at 50% of the FVC, ACQ= Asthma Control Questionnaire.