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Table 2 Baseline Cluster Descriptive. Values shown are number of subjects, and percentage of total subjects [n (%)] unless stated

From: Phenotyping of difficult asthma using longitudinal physiological and biomarker measurements reveals significant differences in stability between clusters

Variable

Phenotype A (n = 15)

Phenotype B (n = 17)

Phenotype C (n = 39)

Phenotype D (n = 54)

p-value

FEV1 < 80 %

12 (80.0)

9 (52.9)

37 (94.9)

20 (37.0)

<0.01

Beclamethasone or equivalent dose >1600mcg

7 (46.7)

2 (11.8)

6 (15.4)

4 (7.4)

<0.01

AOO <20 year

3 (20.0)

7 (41.2)

31 (79.5)

17 (31.5)

<0.01

ACQ ≤ 1

2 (13.3)

5 (29.4)

14 (35.9)

24 (44.4)

0.15

Female

6 (40.0)

10 (58.8)

12 (30.8)

31 (57.4)

0.05

Severe asthmatic

14 (93.3)

10 (58.8)

31 (79.5)

22 (40.7)

<0.01

Atopic

11 (73.3)

13 (76.5)

34 (87.2)

42 (77.8)

0.58

Non-Smoker

9 (60.0)

13 (76.5)

28 (71.8)

27 (50.0)

0.09

Age [mean(SD)]

46.7 (13.4)

44.9 (8.8)

52.4 (12.6)

47.5 (11.9)

0.10

BMI [mean (SD)]

26.2 (3.8)

40.1 (4.4)

27.0 (3.9)

25.4 (3.7)

<0.01

Sputum Neutrophils (%) [mean (SD)]

34.3 (27.4)

51.0 (24.8)

43.6 (29.2)

47.5 (29.3)

0.34

Sputum Eosinophils (%) [mean (SD)]

3.9 (5.3)

33.5 (16.7)

5.1 (6.5)

5.8 (6.0)

<0.01

FENO ppb [mean (SD)]

28.7 (26.5)

25.5 (23.8)

29.7 (30.6)

24.0 (21.4)

0.74

  1. Abbreviations: FEV 1 Forced Expiratory Volume at 1 s, ICS inhaled corticosteroid, AOO age of onset of asthma, ACQ Asthma Control Questionnaire score, BMI body mass index, F E NO fractional of exhaled nitric oxide in parts per billion (ppb). Chi-square test was used for categorical variables, and one-way ANOVA was performed for continuous variables