Table 1 Sociodemographic and baseline characteristics of the COPD patients

From: Morning and night symptoms in primary care COPD patients: a cross-sectional and longitudinal study. An UNLOCK study from the IPCRG

Variablen totalStatistic
Gender and age
 Men2,269n (%)1,312 (57.8)
 Age2,269Mean (s.d.)65.3 (10.8)
 Age of onset1,992Mean (s.d.)52.4 (19.7)
 Exacerbations2,263Mean (s.d.)0.72 (1.1)
Lung function post bronchodilator
 FEV1 (l)2,262Mean (s.d.)2.0 (0.7)
 FEV1% predicted2,263Mean (s.d.)69.3 (18.0)
 FVC (l)2,210Mean (s.d.)3.5 (1.0)
 FVC % predicted2,211Mean (s.d.)98.8 (18.4)
 FEV1 / FVC2,260Mean (s.d.)56.1 (11.0)
 Reversibility2,063Mean (s.d.)6.2 (8.0)
Smoking history (age18 years)2,261  
 Never smoked n (%)80 (3.5)
 Ex-smoker n (%)1,069 (47.1)
 Current smoker n (%)1,112 (49.0)
 Smoking history missing n (%)8 (0.4)
GOLD stage
 GOLD 1 (FEV1>80%)2,269n (%)670 (29.5)
 GOLD 2 (50%<FEV1<80%) n (%)1,257 (55.4)
 GOLD 3 (30%<FEV1<50%) n (%)317 (14.0)
 GOLD 4 (FEV1<30%) n (%)25 (1.1)
 GOLD A2,264n (%)646 (28.5)
 GOLD B n (%)916 (40.4)
 GOLD C n (%)176 (7.8)
 GOLD D n (%)526 (23.2)
 GOLD ABCD missing n (%)5 (0.2)
Patient-reported outcomes
 ACQ question 2: morning symptoms2,231Mean (s.d.)1.1 (1.3)
 Symptomatic (ACQ 21) n (%)1,159 (51.9)
 Severe symptoms (ACQ 24) n (%)109 (4.9)
Of which stable or slightly unstable COPD patients (CCQ<2)109n (%)19 (1.1)
 ACQ question 1: night symptoms2,233Mean (s.d.)0.7 (1.1)
 Symptomatic (ACQ 11) n (%)879 (39.4)
 Severe symptoms (ACQ 14) n (%)74 (3.3)
Of which stable or slightly unstable COPD patients (CCQ<2)74n (%)11 (0.7)
 Clinical COPD questionnaire total score (CCQ)2,263Mean (s.d.)1.4 (1.0)
 Stable (CCQ<1) n (%)817 (36.0)
 Not entirely stable (CCQ1 and<2) n (%)869 (38.3)
 Unstable (CCQ2 and <3) n (%)391 (17.2)
 Very unstable (CCQ3) n (%)177 (7.8)
 CCQ missing n (%)15 (0.7)
 Asthma Control questionnaire total score2,224Mean (s.d.) 
 Controlled (ACQ <0.75) n (%)848 (37.4)
 Partially controlled (ACQ0.75 and <1.50) n (%)625 (27.5)
 Uncontrolled (ACQ1.50) n (%)753 (33.2)
 ACQ missing n (%)43 (1.9)
  1. Abbreviations: ACQ, Asthma Control Questionnaire; CCQ, COPD Clinical Questionnaire; COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; GOLD, Global initiative for chronic obstructive disease.