Table 1. Characteristics of patients with tetralogy of Fallot who underwent surgical repair.
| Variable | Training dataset | Validation dataset | |||||
|---|---|---|---|---|---|---|---|
| LCOS (n=33) | Non-LCOS (n=104) | P value | LCOS (n=25) | Non-LCOS (n=76) | P value | ||
| Age, day | 193 (132, 406) | 196 (149.75, 302.75) | 0.819 | 155 (128, 216.00) | 182 (135.25, 240.00) | 0.281 | |
| Weight, kg | 7.90 (6.40, 9.00) | 7.50 (6.30, 8.50) | 0.639 | 7.05±1.26 | 7.60±1.65 | 0.132 | |
| Male | 19 (57.6) | 66 (63.5) | 0.688 | 13 (52.0) | 47 (61.8) | 0.526 | |
| SpO2, % | 85 (80, 95) | 95 (90, 98) | 0.002 | 90 (84, 91) | 93 (90, 98) | 0.003 | |
| MBP, mmHg | 61.64±8.58 | 68.13±8.71 | <0.001 | 63.42±7.94 | 65.77±8.57 | 0.229 | |
| CVP, mmHg | 13.67 (13.00, 14.67) | 12.33 (11.00, 13.33) | <0.001 | 14.75±1.82 | 12.82±1.54 | <0.001 | |
| CPB time, min | 106.00 (85.00, 140.00) | 88.00 (66.50, 105.25) | 0.002 | 97.80±25.11 | 84.00 (72.75, 98.00) | 0.046 | |
| ACC time, min | 64.00 (50.00, 81.00) | 51.50 (41.00, 66.25) | 0.003 | 59.88±14.96 | 51.00 (41.75, 61.00) | 0.051 | |
| CICU stay, day | 6 (4, 7) | 3 (2, 4) | <0.001 | 5.08±1.53 | 4.00 (3.00, 5.00) | 0.001 | |
| Ventilation, hour | 72.03 (49.28, 121.85) | 26.16 (21.31, 48.26) | <0.001 | 48.93 (25.03, 68.57) | 42.59 (23.66, 46.94) | 0.025 | |
| Hospital stay, day | 19.00 (16.00, 22.00) | 13.00 (11.00, 16.00) | <0.001 | 17.04±3.75 | 15.00 (13.00, 17.00) | 0.055 | |
| Delayed chest closure | 6 (18.2) | 1 (1) | 0.001 | 4 (16.0) | 0 (0) | 0.003 | |
| ECMO | 3 (9.1) | 1 (1) | 0.043 | 3 (12.0) | 0 (0) | 0.017 | |
| Ventricular fibrillation | 4 (12.1) | 0 (0) | <0.001 | 3 (12.0) | 1 (1.3) | 0.074 | |
| Reoperation | 3 (9.10) | 2 (1.92) | 0.090 | 1 (4.0) | 0 (0) | 0.557 | |
| Peritoneal dialysis | 10 (30.30) | 1 (0.96) | <0.001 | 8 (32.0) | 0 (0) | <0.001 | |
| Death | 1 (3) | 1 (1) | 0.425 | 1 (4.0) | 0 (0) | 0.557 | |
Continuous variables are presented as mean ± standard deviation or median (interquartile range) according to data distribution. Categorical variables are presented as number (percentage). ACC, aortic cross-clamp; CICU, cardiac intensive care unit; CPB, cardiopulmonary bypass; CVP, central venous pressure; ECMO, extracorporeal membrane oxygenation; LCOS, low cardiac output syndrome; MBP, mean blood pressure.