TABLE 3

Baseline characteristics

CBT groupLeaflet groupTotal patients
Subjects n139140279
Mean±sd age years66±10.267±9.666.5±9.9
Males/females61 (44)/78 (56)67 (48)/73 (52)128 (46)/151 (54)
Ethnic group, Caucasian139 (100)140 (100)279 (100)
Mean±sd HADS-Anxiety Subscale12.3±3.1912.0±2.9412.2±3.06
HADS-Anxiety Subscale 8–1051 (37)49 (35)100 (36)
HADS-Anxiety Subscale 11–1452 (37)63 (45)115 (41)
HADS-Anxiety Subscale 15–2136 (26)28 (20)64 (23)
Mean±sd HADS-Depression Subscale9.2±4.08.8±3.79.0±3.85
Severity of airflow obstruction based on GOLD criteria
 Mild16 (11)13 (9)29 (10)
 Moderate44 (32)47 (34)91 (33)
 Severe50 (36)49 (35)99 (35)
 Very Severe29 (21)31 (22)60 (22)
MRC Breathlessness score
 0–28 (6)12 (9)20 (7)
 325 (18)19 (14)44 (16)
 439 (28)44 (31)83 (30)
 567 (48)65 (46)132 (47)
Current smoker39 (28)40 (29)79 (28)
Mean±sd BMI kg·m−226±6.427±6.026.5±6.22
No educational qualifications100 (72)103 (74)203 (73)

Data are presented as n (%), unless otherwise stated. CBT: cognitive behavioural therapy; HADS: Hospital Anxiety and Depression Scale; GOLD: Global Initiative for Chronic Obstructive Lung Disease; MRC: Medical Research Council; BMI: body mass index.