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Table 4 Categorisation 2: non-high FeNO and non-high blood eosinophils vs. high FeNO and non-high blood eosinophils

From: Association of elevated fractional exhaled nitric oxide concentration and blood eosinophil count with severe asthma exacerbations

Characteristics

Non-high FeNO and non-high blood eosinophils (n = 98)

High FeNO and non-high blood eosinophils (n = 98)

p-value

Sex

 n (% non-missing)

98 (100.0)

98 (100.0)

1.0000

 Male

41 (41.8)

41 (41.8)

 

Age

 n (% non-missing)

98 (100.0)

98 (100.0)

1.0000

 Mean (SD)

48.8 (15.3)

48.6 (15.6)

 

 Median (IQR)

53.0 (27.0)

53.0 (27.0)

 

Age group

 n (% non-missing)

98 (100.0)

98 (100.0)

0.3072

 Under 35

23 (23.5)

24 (24.5)

 

 35–65

65 (66.3)

57 (58.2)

 

 66–80

10 (10.2)

17 (17.3)

 

Smoking status

 n (% non-missing)

98 (100.0)

98 (100.0)

1.0000

 Non-smoker

53 (54.1)

53 (54.1)

 

 Ex-smoker

8 (8.2)

8 (8.2)

 

 Current smoker

23 (23.5)

23 (23.5)

 

BMI

 n (% non-missing)

96 (98.0)

94 (95.9)

0.0063

 Mean (SD)

29.3 (6.2)

26.9 (5.8)

 

 Median (IQR)

27.9 (8.6)

25.7 (7.6)

 

FeNO

 n (% non-missing)

98 (100.0)

98 (100.0)

< 0.0001

 Mean (SD)

17.7 (7.9)

60.0 (31.8)

 

 Median (IQR)

17.0 (10.0)

50.0 (25.0)

 

Blood eosinophil count

 n (% non-missing)

98 (100.0)

97 (99.0)

< 0.0001

 Mean (SD)

0.2 (0.1)

0.3 (0.3)

 

 Median (IQR)

0.2 (0.1)

0.3 (0.3)

 

Active eczema diagnosisa

 n (% non-missing)

98 (100.0)

98 (100.0)

1.0000

 Yes

4 (4.1)

4 (4.1)

 

Active rhinitis diagnosisa

 n (% non-missing)

98 (100.0)

98 (100.0)

0.7492

 Yes

26 (26.5)

28 (28.6)

 

Eczema diagnosis

 n (% non-missing)

98 (100.0)

98 (100.0)

0.8763

 Yes

29 (29.6)

30 (30.6)

 

Rhinitis diagnosis

 n (% non-missing)

98 (100.0)

98 (100.0)

0.4546

 Yes

32 (32.7)

37 (37.8)

 

IHD diagnosis

 n (% non-missing)

98 (100.0)

98 (100.0)

0.7003

 Yes

4 (4.1)

3 (3.1)

 

Heart failure diagnosis

 n (% non-missing)

98 (100.0)

98 (100.0)

 

 Yes

0 (0.0)

0 (0.0)

 

Hypertension diagnosis

 n (% non-missing)

98 (100.0)

98 (100.0)

0.0967

 Yes

29 (29.6)

19 (19.4)

 

Diabetes diagnosis

 n (% non-missing)

98 (100.0)

98 (100.0)

0.5513

 Yes

7 (7.1)

5 (5.1)

 

GERD active diagnosis

 n (% non-missing)

98 (100.0)

98 (100.0)

0.6018

 Yes

9 (9.2)

7 (7.1)

 

Predicted peak flow

 n (% non-missing)

55 (56.1)

71 (72.4)

0.6615

 Mean (SD)

520.7 (67.4)

515.9 (68.6)

 

 Median (IQR)

490.8 (137.4)

493.7 (125.0)

 

ICS/LABA prescriptions per patient

 n (% non-missing)

98 (100.0)

98 (100.0)

0.1318

 Mean (SD)

2.6 (3.1)

3.4 (3.7)

 

 Median (IQR)

1.0 (4.0)

2.0 (5.0)

 

Mono ICS prescriptions per patient

 n (% non-missing)

98 (100.0)

98 (100.0)

0.0295

 Mean (SD)

1.6 (2.8)

0.9 (1.9)

 

 Median (IQR)

0.0 (2.0)

0.0 (1.0)

 

Mean daily SABA dosage (µg)

 n (% non-missing)

98 (100.0)

98 (100.0)

0.3731

 < 100

31 (31.6)

40 (40.8)

 

 100–200

32 (32.7)

22 (22.4)

 

 201–400

20 (20.4)

22 (22.4)

 

 > 400

15 (15.3)

14 (14.3)

 

ICS adherenceb

 n (% non-missing)

98 (100.0)

98 (100.0)

0.4778

 Mean (SD)

58.1 (43.5)

65.7 (67.6)

 

 Median (IQR)

49.3 (57.5)

49.3 (54.8)

 
  1. All values in the table are n (%) unless otherwise specified. High FeNO defined as ≥ 35 ppb; non-high FeNO < 35 ppb; high blood eosinophil count defined as ≥ 0.300 × 109 cells/L; non-high blood eosinophil count < 0.300 × 109 cells/L
  2. BMI body mass index, FeNO fractional exhaled nitric oxide, GERD gastroesophageal reflux disease, ICS inhaled corticosteroid, IHD ischaemic heart disease, IQR interquartile range, LABA long-acting β2-agonist, ppb parts per billion, SABA short-acting β2-agonist, SD standard deviation
  3. aActive denotes diagnosed in the year before FeNO reading or treated in the year before FeNO reading
  4. bMedication Possession Ratio was calculated by dividing the total of 1 day’s supply by the total number of days evaluated, multiplied by 100%. The evaluation period for all patients was 365 days in the study year