Table 2

Study parameters

ParametersBaselineFollow-up
Before 6MWT
Demographics, smoking history, diagnosis, basis for the diagnosis, year of diagnosisX
Comorbidities, medications, resting oxygen saturationX
Pulmonary function (FEV1, FVC, DLCO)X
LTOT, dose and durationXX
GAP/GOLD stageX
KBILDXX
CATXX
MRC scoreXX
6MWT with COB and DODSX
After 6MWT
Patient preferences for COB or DODS (“Which system do you prefer?”)X
Comfort measured by a Likert scaleXX
Reliability measured by a Likert scaleXX
Qualitative interviews about patients’ view on AOT with COB/DODSX
Registration of adverse eventsXX
  • AOT, ambulatory oxygen therapy; CAT, Chronic Obstructive Pulmonary Disease Assessment Test; COB, continuous oxygen with bottles; DLCO, diffusing capacity of the lungs for carbon monoxide; DODS, demand oxygen delivery system; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; GAP, gender-age-physiology; GOLD, Global Initiative for Chronic Obstructive Lung Disease; KBILD, The King’s Brief Interstitial Lung Disease Questionnaire; LTOT, long-term oxygen therapy; MRC, Medical Research Council; 6MWT, 6-minute walk test.