Characteristics at the time of Fontan procedure compared between areas of follow-up
| Area 1 (n=721) | Area 2 (n=648) | p Value | |
|---|---|---|---|
| Male | 425 (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 | |||
| AP | 124 (17) | 81 (13) | 0.015 |
| LT | 132 (18) | 146 (23) | 0.06 |
| ECC | 458 (64) | 415 (64) | 0.87 |
| Unknown | 7 (1) | 6 (1) | >0.99 |
| Time period | |||
| 1975–1989 | 112 (16) | 74 (11) | 0.028 |
| 1990–1999 | 183 (25) | 155 (24) | 0.57 |
| 2000–2009 | 264 (37) | 247 (38) | 0.58 |
| 2010–2015 | 162 (22) | 172 (27) | 0.089 |
| Morphology | |||
| LV | 405 (56) | 347 (54) | 0.36 |
| RV | 216 (30) | 189 (29) | 0.77 |
| Biventricular/indeterminate | 100 (14) | 112 (17) | 0.086 |
| HLHS | 80 (11) | 81 (13) | 0.45 |
| Palliations prior to Fontan—mean (SD)† | 2.0 (1.1) | 1.8 (1.0) | 0.001 |
| BCPC prior to Fontan | 413 (57) | 384 (59) | 0.48 |
| Mean follow-up time—mean (SD) years† | 11 (8) | 10 (8) | 0.046 |
| No follow-up available | 31 (4) | 36 (6) | 0.32 |
| No follow-up available in previous 3 years | 103 (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.