“…Unlike the SPPB, the TUG test has no ceiling effect and owing to simplicity, validity, and high reliability, its use has become widespread in health care and across different disease states and general, older populations. [12][13][14][15][16] A few studies have investigated the TUG test in patients with COPD, although, to date, these have been generally in small populations and often not with comparator groups. 6 , 8 , 17-19 Where there has been a control group, the TUG test time was increased in patients.…”