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Table 1 Characteristics of COPD patients in low and high SUV39H1 expression groups

From: Suppressor of variegation 3–9 homologue 1 impairment and neutrophil-skewed systemic inflammation are associated with comorbidities in COPD

Variables

Low SUV Exp. (n = 15)

High SUV Exp. (n = 15)

p value

Male, n (%)

14 (93)

15 (100)

1

Age, years; median (IQR)

71 (64–77)

70 (62–74)

0.561

BMI; median (IQR)

24 (23.2–26.2)

22.7 (19.9–24.6)

0.141

Cigarette smoking, n (%)

  

0.413

Current smoker

5 (33)

8 (53)

 

Ex-smoker

7 (47)

6 (40)

 

Never smoker

3 (20)

1 (7)

 

Comorbidities, n (%)

  

0.919

Heart failure

2 (13)

0 (0)

 

Coronary artery disease

3 (20)

4 (27)

 

Pulmonary hypertension

4 (27)

2 (13)

 

Lung cancer

0 (0)

0 (0)

 

Anxiety/depression

1 (7)

1 (7)

 

Osteoporosis

0 (0)

1 (7)

 

Malnutrition (BMI < 20)

2 (13)

4 (27)

 

Diabetes mellitus

1 (7)

2 (13)

 

OSA

1 (7)

1 (7)

 

Anemia

2 (13)

2 (13)

 

Lung fibrosis

1 (7)

0 (0)

 

Charlson comorbidity Index score; median (IQR)

5 (3–5)

4 (4–6)

0.833

Hemogram values; median (IQR)

   

Leukocyte count

7800 (6300–9200)

6600 (5950–7200)

0.110

Neutrophil, %

65 (60–71)

59 (52–61)

0.015*

Eosinophil, %

2 (1–3)

2 (2–4)

0.125

E/N Ratio, %

3.6 (1.7–4.7)

4.7 (3.7–7.1)

0.071

Pulmonary function tests; median (IQR)

   

Post bronchodilator FEV1/FVC,%

62 (50–65)

60 (55–64)

0.868

Post bronchodilator FEV1, %

57 (35–67)

55 (40–73)

0.934

COPD subtypes, n (%)

  

0.966

Stage 1

2 (13)

2 (13)

 

Stage 2

8 (54)

7 (47)

 

Stage 3

2 (13)

3 (20)

 

Stage 4

3 (20)

3 (20)

 

ACO, n (%)

0 (0)

1 (6.7)

1

Exacerbations per year; median (IQR)

1 (0–1)

0 (0–1)

0.115

  1. BMI, body mass index; E/N Ratio: Eosinophil/neutrophil count ratio; FEV1/FVC, first second of forced expiration/forced vital capacity; LAMA, long acting muscarinic antagonist; LABA, long-acting β2-agonists; ICS, inhaled corticosteroids; ACO, asthma-COPD overlap
  2. *p < 0.05
  3. Data are expressed as n, percentage, median and interquartile range (IQR, Q1–Q3) in bracket
  4. Chi square comparison for Cigarette smoking, Comorbidities and COPD subtypes
  5. Mann–Whitney U test for other variables
  6. The low expression [fold change (FC) < 0.5] or high expression (FC ≥ 0.5) of SUV39H1 proteins in COPD patients relative to normal controls were indicated as “Low SUV Exp.” or “High SUV Exp.”, respectively