2.2 Collection of data
Data on the age, gender, body mass index (BMI), smoking status, and fall
history in the last 1 year were recorded for all subjects. The
respiratory function tests were performed with reference to the American
Thoracic Society/European Respiratory Society criteria, and the
parameters forced vital capacity (FVC), forced expiratory volume first
second (FEV1), and the ratio of FEV1/FVC were
recorded.8 In addition, the scores of 6-min-walk-test
(6MWT), modified Medical Research Council (mMRC) dyspnea scale, COPD
assessment questionnaire (CAT), BMI (B), the severity of airway
obstruction (O), the dyspnea severity (D), and exercise capacity (E)
(BODE) index were also collected. All patients with COPD were classified
into 4 groups based on the GOLD 2017 criteria. Accordingly, the patients
with high frequency of symptoms were assigned to Group B or D, while
those with high risk of exacerbation were assigned to Group C or
D.9 All subjects were informed about the balance
tests, and based on how the tests were performed, BBS, SLS, 5STS, FSST,
and TUG tests were performed in the physical therapy and rehabilitation
outpatient clinic.