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Table 1 Basic characteristics of the whole population (asthma and non-asthma) and characteristics of the study population (with asthma) in Helsinki and Western Finland

From: Agreement between self-reported and registered age at asthma diagnosis in Finland

Whole population

 

Helsinki (n = 3830)

Western Finland (n = 1849)

Median

IQR

Median

IQR

Age (years)

- Male

- Female

55

56

55

44–65

45–65

44–65

56

57

54

42–63

44–63

40–62

 

N

%

N

%

Female

2164

56.8

973

52.6

Study population

 

Helsinki (n = 197)

Western Finland (n = 144)

Median

IQR

Median

IQR

Age (years)

- Male

- Female

59.0

59.0

59.0

50.0-68.0

45.5-68.0

50.0-66.2

59.0

62.0

58.0

45.8–65.0

48.0–66.0

41.0–65.0

BMI (kg/m2)

- Male

- Female

26.0

25.7

26.1

23.0-29.7

23.6-28.8

22.8-30.1

27.9

28.7

27.4

24.4–31.5

25.6–33.0

23.2–30.3

 

N

%

N

%

Female

132

67.7

83

57.6

Smoking

- Current

- Ex

- Never

33

76

88

16.8

38.6

44.7

22

56

65

15.4

39.2

45.5

 

Median

IQR

Median

IQR

Age at asthma diagnosis (years)

Time elapsed from self-reported asthma diagnosis

19.0

9.0–28.0

18.0

8.8–26.0

Time elapsed from registered asthma diagnosis

12.0

6.0–21.0

13.0

6.0–21.0

Self-reported age at asthma diagnosis

40.0

29.0–51.0

40.0

24.8–50.0

 

N

%

N

%

Self-reported age at asthma diagnosis

- <12

- 12–39

- ≥40

17

76

104

8.6

38.6

52.8

14

55

75

9.7

38.2

52.1

Medication

History of one or more R03 purchases

183

92.9

129

89.6

Use of asthma medication

186

94.4

131

91.0

 

Median

IQR

Median

IQR

Allergies, symptoms, and allergic heredity:

Physician-diagnosed allergic rhinitis

102

51.8

64

44.4

Family history of asthma

97

49.2

73

50.7

Asthma symptoms:

Attacks of breathlessness now or during the last 12 months

152

77.2

114

79.2

Wheeze last 12 months

113

57.4

84

58.3

Tightness in the chest last 12 months

93

47.2

62

43.1

Hospitalization or visits to emergency department due to asthma exacerbation during last 12 months

17

8.6

12

8.3

  1. IQR, interquartile range; BMI, Body Mass Index; R03, ATC code for drugs for obstructive airway diseases; COPD, Chronic obstructive pulmonary disease