Table 1.
Baseline characteristics of patients based on delirium and non-delirium of subjects
| Variable | Total (n=296) |
Delirium (n=68) |
Non-delirium (n=228) |
P-value |
|---|---|---|---|---|
| Age (years) | 62 (54–66) | 64 (59–73) | 61 (53–66) | <0.001** |
| Gender, n (%) | 0.92*** | |||
| Female | 64 (22) | 16 (23) | 48 (21) | |
| Male | 232 (78) | 52 (77) | 180 (79) | |
| Education level, n (%) | 0.007*** | |||
| Illiterate | 104 (35) | 38 (56) | 66 (29) | |
| Less than diploma | 136 (46) | 24 (35) | 112 (49) | |
| Diploma | 40 (14) | 0 (0) | 40 (18) | |
| College education | 16 (5) | 6 (9) | 10 (4) | |
| NYHA classification, n (%) | 0.23*** | |||
| Class II | 236 (80) | 50 (73) | 186 (82) | |
| Class III | 38 (13) | 8 (12) | 30 (13) | |
| Class IV | 22 (7) | 10 (15) | 12 (5) | |
| Type of surgery, n (%) | 0.50*** | |||
| SVD | 20 (7) | 6 (9) | 14 (6) | |
| 2VD | 56 (19) | 10 (15) | 46 (20) | |
| 3VD | 208 (70) | 50 (73) | 158 (69) | |
| CABG+ valvular | 12 (4) | 2 (3) | 10 (5) | |
| Hemoglobin,a (g/dL) | 13.70±1.83 | 13.39±1.66 | 13.80±1.88 | 0.25* |
| Comorbidities | ||||
| Diabetes mellitus, n (%) | 132 (45) | 30 (44) | 102 (45) | 0.65*** |
| Hypertension, n (%) | 150 (51) | 42 (62) | 108 (47) | 0.04*** |
| Hyperlipidemia n (%) | 104 (35) | 18 (26) | 86 (38) | 0.02*** |
| Smoker, n (%) | 82 (28) | 14 (21) | 68 (30) | 0.34*** |
| Addiction, n (%) | 54 (18) | 14 (21) | 40 (17) | 0.90*** |
| Eye problem, n (%) | 20 (7) | 10 (15) | 10 (4) | 0.001*** |
| Ear/language barrier, n (%) | 26 (9) | 8 (12) | 18 (8) | 0.29*** |
| Alcohol use | 0 | 0 | 0 | 1 |
| CPB duration (h:min) | 4:3 (4–4:47) | 4:3 (3:82–5:07) | 4:2 (4:0–4:45) | 0.33** |
| Post-surgery sodium, mg/dL | 140.76±12.04 | 142.91±2.9 | 140.12±13.56 | 0.005* |
| Post-surgery potassium, mg/dL | 4.5 (4.2–4.7) | 4.5 (4.3–4.7) | 4.5 (4.2–4.7) | 0.48** |
| Post-surgery creatinine, mg/dL | 1.20±0.32 | 1.34±0.42 | 1.16±0.27 | 0.005* |
| Poor mobilization, n (%) | 72 (24) | 12 (18) | 60 (26) | 0.60*** |
| Poor sleep, n (%) | 48 (16) | 8 (12) | 40 (17) | 0.54*** |
| LOS ICU, days | 2 (2–4) | 4 (2–5) | 2 (2–3) | 0.00** |
| LOS hospital, days | 6 (5–7) | 7 (6–9) | 6 (5–7) | 0.00** |
| Acute infection, n (%) | 6 (2) | 2 (3) | 4 (2) | 0.45*** |
Notes: *Student's t-test (mean ± SD) **Mann–Whitney U-test (median, IQR) ***Chi-square test. aPre-surgery.
Abbreviations: NYHA, New York Heart Association Heart Function; SVD, single vessel disease; CABG, coronary artery bypass grafting; CPB, cardiopulmonary bypass; 2VD, two vessel disease; 3VD, three vessel disease; LOS, length of stay; ICU, intensive care unit.