Table 1

Baseline Recipient Characteristics Before Matching

Early Adolescent Donor Heart (Ages 10–14 yrs; n = 1,123)Adult Donor Heart (Ages 18–55 yrs; n = 33,931)p ValueSD, %
Age at transplant, yrs48.4 ± 14.252.6 ± 11.9<0.00131.90
Age category
 <50 yrs482 (42.92)10,885 (32.08)<0.00123.00
 50–59 yrs366 (32.59)12,153 (35.82)
 ≥60 yrs275 (24.49)10,893 (32.10)
Female550 (48.98)7,721 (22.76)<0.00156.80
Black race194 (17.28)5,578 (16.44)0.4572.20
Sex mismatch (female donor to male recipient)120 (10.69)5,765 (16.99)<0.00118.30
Size mismatch by weight (donor weight <70% of recipient)122 (10.86)1,091 (3.22)<0.00130.20
Size mismatch by height (donor/recipient height ratio <0.90)130 (11.58)1,246 (3.67)<0.00130.10
Donor/recipient height ratio0.98 ± 0.081.00 ± 0.06<0.00131.70
Etiology of heart failure (ischemic)257 (22.89)11,836 (34.88)<0.00126.70
History of any previous cardiac surgery126 (11.22)7,242 (21.34)<0.00127.70
Total waitlist time, months6.0 ± 8.47.3 ± 11.5<0.00112.60
UNOS status 1A or old status 1 at transplant519 (46.22)17,957 (52.92)<0.00113.40
Recipient creatinine at transplant, mg/dl1.2 ± 0.61.3 ± 0.9<0.00115.40
Recipient creatinine at transplant >1.5 mg/dl228 (20.30)8,125 (23.95)0.0058.80
Recipient blood type O401 (35.71)13,168 (38.81)0.0366.40
Recipient BMI at transplant, kg/m224.2 ± 4.626.7 ± 4.7<0.00154.90
Recipient BMI >30 kg/m2 at transplant134 (11.93)7,991 (23.55)<0.00130.80
History of blood transfusion since listing166 (14.78)6,723 (19.81)<0.00113.30
Current era (2005 onward)337 (30.01)17,743 (52.29)<0.00146.50
Life support with inotropes545 (48.53)15,331 (45.18)0.0276.70
LVAD only life support at transplant80 (7.12)6,119 (18.03)<0.00133.30
LVAD and RVAD support at transplant18 (1.60)616 (1.82)0.5991.60

Values are mean ± standard deviation or n (%).

BMI = body mass index; LVAD = left ventricular assist device; RVAD = right ventricular assist device; SD = standardized difference; UNOS = United Network Organ Sharing.