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. 2018 Feb 26;8:3613. doi: 10.1038/s41598-018-21417-7

Table 2.

The donor features used in the IHTSA model.

Feature N Time era 1997–2008 Time era 2009–2011 p-Value IMPACT IHTSA
(n = 22,263) (n = 5,597)
Demographic data
  Age (years) 27,075 32 ± 12 32 ± 12 0.515
  Female gender 27,860 6,546 (29%) 1,645 (29%) 0.979
  Weight (kg) 27,838 79 ± 19 82 ± 19 0.001
  Duration of ischemia (min) 26,029 189 ± 63 194 ± 10 0.001
  CODD: Head Trauma 27,825 13,733 (62%) 3,068 (55%) 0.001
  CODD: Cerebrovascular event 27,825 5,894 (27%) 1,297 (23%) 0.001
Donor blood group
  A 27,859 8,232 (37%) 1,983(35%) 0.030
  B 27,859 2,284 (10%) 617 (11%) 0.102
  AB 27,859 477 (2%) 125 (2%) 0.682
  O 27,859 11269 (40%) 2,873 (51%) 0.001
  Recipient-donor weight ratio 27,739 1.03 ± 0.22 1.02 ± 0.20 0.001
  Recipient-donor height ratio 27,660 0.998 ± 0.06 0.999 ± 0.06 0.068

N, number of transplants with non-missing values. n, total number of transplants. Qualitative data are expressed as n (%), and quantitative data as mean ± SD. CODD, cause of donor death; IHTSA, international heart transplantation survival algorithm; IMPACT, index for mortality prediction after cardiac transplantation. The t-test and chi-squared test was used for continuous respectively categorical values.