From: The validity and precision of the leicester cough questionnaire in COPD patients with chronic cough
Cronbach's alpha coefficient
LCQ*
Birring[16]†
Huisman[17]†
This study‡
physical
0.79
0.77
0.67
psychological
0.89
0.84
0.75
social
0.85
0.83
0.74
total
0.92
0.93
0.86