Table 4.
Predictive factors for hospital stay after cardiac surgery (n = 362).
| Variable | Hospital stay |
|||||
|---|---|---|---|---|---|---|
| ≤7 days |
>7 days |
Univariate |
Multivariate |
|||
| n (%)/mean (SD) | n (%)/mean (SD) | p value | aOR | 95% CI | p value | |
| Age (years) | ||||||
| ≤50 | 64 (41.6) | 90 (58.4) | 0.682 | |||
| >50 | 82 (39.4) | 126 (60.6) | ||||
| Sex | ||||||
| Male | 80 (36.5) | 139 (63.5) | 0.068 | 1.39 | 0.87–2.24 | 0.171 |
| Female | 66 (46.2) | 77 (53.8) | 1 | |||
| Type of surgery | ||||||
| CABG | 68 (44.2) | 86 (55.8) | 0.008 | 1.79 | 0.84–3.96 | 0.150 |
| Valve | 56 (32.9) | 114 (67.1) | 2.44 | 1.11–5.35 | 0.026 | |
| Combined | 22 (57.9) | 16 (42.1) | 1 | |||
| DM | 53 (42.7) | 71 (57.3) | 0.500 | |||
| Hypertension | 45 (41.7) | 63 (58.3) | 0.736 | |||
| IHD | 72 (44.2) | 91 (55.8) | 0.178 | |||
| VHD | 65 (34.8) | 122 (65.2) | 0.025 | 0.73 | 0.37–1.43 | 0.364 |
| Asthma/COPD | 03 (42.9) | 04 (57.1) | 0.891 | |||
| CKD | 04 (36.4) | 07 (63.6) | 0.785 | |||
| Weight (kg) | 59.9 (11.4) | 61.8 (12.8) | 0.162 | |||
| LVEF | 54.4 (3.5) | 54.2 (3.4) | 0.574 | |||
| Preop Hb | 12.2 (1.9) | 12.5 (1.6) | 0.141 | 1.11 | 0.97–1.27 | 0.117 |
| Creatinine | 1.16 (0.24) | 1.20 (0.28) | 0.146 | 1.47 | 0.62–3.49 | 0.380 |
| CPB time | 87.2 (26.4) | 88.4 (29.3) | 0.694 | |||
| ACC time | 51.2 (18.2) | 52.2 (19.6) | 0.614 | |||
| Pump flow rate | 3.7 (0.5) | 3.8 (0.6) | 0.666 | |||
| CPB lactate | 4.1 (0.6) | 4.2 (1.7) | 0.188 | |||
| ACC lactate | 3.9 (1.3) | 4.0 (2.3) | 0.596 | |||
| On-pump Hb | 6.8 (1.2) | 6.9 (1.3) | 0.274 | |||
| ICU lactate | 4.4 (1.6) | 4.5 (1.8) | 0.630 | |||
| 6-hr lactate | 4.2 (2.1) | 4.5 (2.1) | 0.141 | 1.04 | 0.93–1.16 | 0.537 |
| 12-hr lactate | 3.1 (1.8) | 3.2 (1.7) | 0.343 | |||
| 24-hr lactate | 2.0 (1.0) | 2.3 (1.4) | 0.015 | 1.23 | 1.01–1.50 | 0.036 |
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 = 24.269, p = 0.002 and Hosmer and Lemeshow p = 0.686 indicates that the model fits the data. The classification table reports that overall expected model performance is 64.3%, that is, 64.3% of the cases can be expected to be classified correctly by the model.