Table 1

Characteristics at the time of Fontan procedure compared between areas of follow-up

Area 1 (n=721)Area 2 (n=648)p Value
Male425 (59)359 (55)0.19
Median age at Fontan in years
Median (IQR)*
4.6 (3.5–6.2)4.8 (3.8–6.4)0.034
Fontan type
 AP124 (17)81 (13)0.015
 LT132 (18)146 (23)0.06
 ECC458 (64)415 (64)0.87
 Unknown7 (1)6 (1)>0.99
Time period
 1975–1989112 (16)74 (11)0.028
 1990–1999183 (25)155 (24)0.57
 2000–2009264 (37)247 (38)0.58
 2010–2015162 (22)172 (27)0.089
Morphology
 LV405 (56)347 (54)0.36
 RV216 (30)189 (29)0.77
 Biventricular/indeterminate100 (14)112 (17)0.086
HLHS80 (11)81 (13)0.45
Palliations prior to Fontan—mean (SD)†2.0 (1.1)1.8 (1.0)0.001
BCPC prior to Fontan413 (57)384 (59)0.48
Mean follow-up time—mean (SD) years11 (8)10 (8)0.046
No follow-up available31 (4)36 (6)0.32
No follow-up available in previous 3 years103 (14)134 (21)0.002
  • *Compared using non-parametric statistical testing.

  • †Compared using parametric statistical testing.

  • AP, atriopulmonary; BCPC, bi-directional cavo-pulmonary connection; ECC, extracardiac conduit; HLHS, hypoplastic left heart syndrome; IQR, interquartile range; LT, lateral tunnel; LV, left ventricle; RV, right ventricle.