Table 3.
Predictive factors for ICU stay after cardiac surgery (n = 362).
| Variable | ICU stay |
|||||
|---|---|---|---|---|---|---|
| ≤2 days |
>2 days |
Univariate |
Multivariate |
|||
| n (%)/mean (SD) | n (%)/mean (SD) | p value | aOR | 95% CI | p value | |
| Age (years) | ||||||
| ≤50 | 121 (78.6) | 33 (21.4) | 0.491 | |||
| >50 | 157 (75.5) | 51 (24.5) | ||||
| Sex | ||||||
| Male | 160 (73.1) | 59 (26.9) | 0.037 | 1.73 | 1.01–2.96 | 0.045 |
| Female | 118 (82.5) | 25 (17.5) | 1 | |||
| Type of surgery | ||||||
| CABG | 120 (77.9) | 34 (22.1) | 0.194 | |||
| Valve | 125 (73.5) | 45 (26.5) | ||||
| Combined | 33 (86.5) | 05 (13.2) | ||||
| DM | 93 (75.0) | 31 (25.0) | 0.559 | |||
| Hypertension | 88 (81.5) | 20 (18.5) | 0.168 | |||
| IHD | 127 (77.9) | 36 (22.1) | 0.648 | |||
| VHD | 143 (76.5) | 44 (23.5) | 0.880 | |||
| Asthma/COPD | 04 (57.1) | 03 (42.9) | 0.206 | |||
| CKD | 09 (81.8) | 02 (18.2) | 0.689 | |||
| Weight (kg) | 61.3 (11.9) | 60.2 (13.3) | 0.480 | |||
| LVEF | 54.4 (3.4) | 54.1 (3.5) | 0.534 | |||
| Preop Hb | 12.4 (1.7) | 12.4 (1.7) | 0.891 | |||
| Creatinine | 1.19 (0.27) | 1.18 (0.25) | 0.711 | |||
| CPB time | 87.9 (28.7) | 87.7 (26.1) | 0.938 | |||
| ACC time | 52.0 (19.8) | 51.2 (16.2) | 0.714 | |||
| Pump flow rate | 3.7 (0.6) | 3.8 (0.5) | 0.553 | |||
| CPB lactate | 4.1 (0.6) | 4.3 (2.6) | 0.413 | |||
| ACC lactate | 3.9 (2.1) | 4.0 (1.4) | 0.785 | |||
| On-pump Hb | 6.9 (1.3) | 6.8 (1.2) | 0.421 | |||
| ICU lactate | 4.5 (1.7) | 4.3 (1.8) | 0.277 | |||
| 6-hr lactate | 4.4 (2.0) | 4.5 (2.2) | 0.691 | |||
| 12-hr lactate | 3.0 (1.6) | 3.5 (1.9) | 0.021 | 1.09 | 0.95–1.27 | 0.215 |
| 24-hr lactate | 2.1 (1.1) | 2.6 (1.7) | 0.000 | 1.32 | 1.09–1.59 | 0.004 |
ICU: intensive care unit, SD: standard deviation, aOR: adjusted odds ratio, CI: confidence interval, CABG: coronary artery bypass grafting, DM: diabetes mellitus, IHD: ischemic heart disease, VHD: valvular heart disease, COPD: chronic obstructive pulmonary disease, CKD: chronic kidney disease, LVEF: left ventricular ejection fraction, Preop Hb: preoperative hemoglobin, CPB: cardiopulmonary bypass, ACC: aortic cross-clamp.
Model χ2 = 17.404, p = 0.001 and Hosmer and Lemeshow p = 0.398 indicates that the model fits the data. The classification table reports that overall expected model performance is 78.5%, that is, 78.5% of the cases can be expected to be classified correctly by the model.