Comparison of procedure characteristics 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* | |
|---|---|---|---|---|---|
| Data are median (interquartile range) or number (%). | |||||
| *For the differences across eras; †χ2 test; ‡analysis of variance; §era 1 v era 2, p = 0.0014, era 2 v era 3, p = 0.0065, and era 1 v era 3, p<0.001; ¶era 1 v era 2, p = 0.312, era 2 v era 3, p = 0.165, and era 1 v era 3, p<0.0001. | |||||
| ITU, intensive treatment unit. | |||||
| Bypass time (min) | 69.0 (59.0) | 50.0 (39.3)) | 65.5(64.5) | 87.0(57.0) | <0.001†‡ |
| Aortic cross clamp time (min) | 45.0 (41.5) | 30.0(28.5) | 42.0(46.8) | 53.0(39.5)) | <0.001†§ |
| ITU stay (nights) | 1 (0.0) | 1 (0.0) | 1(0.0) | 1(0.25) | 0.3906† |
| Ventilation time (hours) | 8 (10.3) | 7 (10.0) | 7(10.8) | 9(10.6) | 0.0958† |
| Blood use (units) | 1 (2.0) | 1 (3.0) | 1(2.0) | 1(2.0) | 0.7335† |
| Deaths | 30 (6.3%) | 12 (7.3%) | 13 (8.2%) | 5 (3.4%) | 0.1847¶ |
| All complications | 113 (33%) | 26 (23%) | 42 (36%) | 45 (41%) | 0.0931¶ |
| Hospital stay (days) | 6 (3.0) | 6 (2.0) | 6 (3.8) | 7 (4.0) | 0.9370† |