Table 2

Individual data requested to authors for IPD-MA

Patient-level data
Study parametersPatient detailsIntervention/treatmentOutcomes
Follow-up time period

  • Sex

  • Age

  • FEV1 (L)

  • Tiffeneau index (FEV1/FVC)

  • PaO2 (mm Hg)

  • PaCO2 (mm Hg)

  • BMI

  • Comorbidities

LTOT (ie, prescribed at least 15 hours/day) at the inclusion time

  • Vital status at publication time

  • Death date

Study-level data

  • Country of completion

  • Date of publication

  • Methodological quality of study

  • Reasons for missing data

  • BMI, body mass index; FEV1, forced expiratory volume in one second; FVC, forced vital capacity; IPD-MA, individual patient data meta-analysis; LTOT, long-term oxygen therapy; PaCO2, arterial carbon dioxide tension; PaO2, arterial oxygen tension.