Baseline characteristics of donors 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. N is the number of non––missing values. The numbers were calculated from patients with data available. CODD, cause of donor death; DC, derivation cohort; 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 donors in the derivation and validation cohorts.