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Table 1 Main general and functional data of the overall population of COPD patients

From: Adaptive NKG2C+ natural killer cells are related to exacerbations and nutritional abnormalities in COPD patients

COPD patientsn\( \overline{\mathrm{X}} \)±SD
Age (years)6670 ± 8
Sex (male %)6652(82)
Tobacco (pack-year)6641 ± 11
Anthropometry
 Weight (kg)6671 ± 18
 BMI (kg/m2)6626.2 ± 6.5
 FFMI (kg/m2)5216.9 ± 2.7
 Exacerbations (n)661.3 ± 1.2
Blood test and flow cytometry
 Eosinophils (total/mm3)66199 ± 164
 HCMV+ (%)3531(89)
 NK5919.1 ± 10
 NKG2C+6314.4 ± 17
 NKG2A+4629.2 ± 17
Functional testing
 FEV1 (% pred.) pre/post bd6637 ± 14/39 ± 15
 FEV1/FVC (%) pre/post bd6644 ± 11/44 ± 12
 RV/TLC (%)6063 ± 11
 DLco (% pred.)6044 ± 20
 Kco (% pred.)6051 ± 20
 SpO2 (%)6693 ± 3
 6MWT (m)56359 ± 122
CT Scan
 Emphysema (%)5844(76)
 Bronchiectasis (%)5813(22)
  1. Data are presented as means ± standard deviation (\( \overline{\mathrm{X}} \) ±SD) or n(percentages). Abbreviations: BMI body mass index; FFMI fat free mass index; FEV1 forced expiratory volume in the first second; bd bronchodilator; FVC forced vital capacity; RV residual volume; TLC total lung capacity; DLco carbon monoxide transfer coefficient; Kco Krogh index (DLco/alveolar volume; SpO2 oxygen saturation (pulse oximetry); 6MWT six-minute walking test distance. CT computed tomography,