Table 1.
Characteristics of adult patients undergoing surgery for congenital heart disease over three time periods
| All eras | Era 1 (1/1/90–30/4/94) | Era 2 (1/5/94–31/8/98) | Era 3 (1/8/98–31/12/02) | p Value* | |
| Number of procedures | 474 | 165 | 159 | 149 | |
| Number of patients | 438 | 151 | 148 | 139 | |
| Women | 212 (44.7%) | 84 (50.9%) | 60 (37.7%) | 68 (45.6%) | 0.0567† |
| Men | 262 (55.3%) | 81 (49.1%) | 99 (62.3%) | 81 (54.4%) | |
| Age (years) | 25.4 (18.7) | 25.4 (20.7) | 27.0 (18.7) | 23.9 (17.3) | 0.0437‡ |
| Repeat procedures | 162 (34.2%) | 41 (24.8%) | 47 (29.6%) | 74 (49.7%) | <0.0001†§ |
| NYHA class | |||||
| I | 2 (0.7%) | 2 (2.6%) | 0 (0.0%) | 0 (0.0%) | 0.0456†¶ |
| II | 92 (33.3%) | 35 (44.9%) | 31 (31.6%) | 26 (26.3%) | |
| III | 124 (44.9%) | 28 (35.9%) | 46 (46.9%) | 50 (50.5%) | |
| IV | 58 (21.0%) | 13 (16.7%) | 21 (21.4%) | 23 (23.2%) |
Data are median (interquartile range) or number (%).
*For differences across the three time eras; †χ2 test; ‡Kruskal-Wallis rank test; §era 3 v era 1 and era 3 v era 1, p<0.001; ¶more patients were in New York Heart Association (NYHA) class I and II and fewer in NYHA class III and IV in era 1 than in eras 2 and 3 (appendix 2).