TABLE 1

Characteristics of the study population and control group

AECOPDControls
Subjects3030
Sex
 Female20 (67)9 (30)
 Male10 (33)21(70)
Age years
 Mean75±7.771±13
 Median7671
Comorbidities (patient-reported)
 Diabetes7 (23)9 (30)
 Atrial fibrillation5 (17)0
 Congestive heart failure3 (10)0
 Hypertension3 (10)2 (7)
 Angina3 (10)3 (10)
 Asthma04 (13)
 Reflux5 (17)11 (37)
GOLD stage
 10 (0)
 25 (17)
 315 (50)
 410 (33)
Spirometry
 FEV1 % pred36±15
 FEV1/FVC43.5±13.1
Respiratory rate breaths·min−121±620±6
Smoking
 Current6 (20)2 (7)
 Former23 (77)14 (47)
 Never1 (3)14 (47)
BMI kg·m−224±6.428±5.6
Xerostomia21 (70)15 (50)
Dyspnoea symptom burden#27 (90)15 (50)

Data are presented as n, n (%) or mean±sd unless otherwise stated. AECOPD: acute exacerbation of COPD; GOLD: Global Initiative for Obstructive Lung Disease; FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; BMI: body mass index. #: modified Medical Research Council score ≥2.