Baseline characteristics of recipients in the derivation and validation cohorts.

a b c represent the lower quartile a, the median b, and the upper quartile c for continuous variables. Numbers within parenthesis are frequencies. The numbers were calculated from patients with data available.#Drug or insulin treated diabetes mellitus.†Drug treated systemic hypertension.‡Infection requiring intravenous antibiotic therapy within two weeks prior to transplant.*Previous transplant—previous kidney, liver, pancreas, pancreas islet cells, heart, lung, intestine and/or bone marrow transplant. COPD, chronic obstructive pulmonary disease; DC, derivation cohort; HLA, human leukocyte antigen; ISHLT, international society for heart and lung transplantation; IVC, internal validation cohort; NTTD, Nordic thoracic transplantation database; PRA, panel reactive antibody; PVR, pulmonary vascular resistance; SPP, systolic pulmonary pressure. TVC, temporal validation cohort. Statistical tests: Unpaired Mann-Whitney U-tests or and χ2 tests.Baseline characteristics of recipients in the derivation and validation cohorts.