Table 3.
Relationship between mortality and patient characteristics, comorbidities, length of hospitalization, serum creatinine, sodium, potassium, and blood urea nitrogen levels
| Variable | Mortality |
χ 2 | P | |
|---|---|---|---|---|
| Yes, n (%) | No, n (%) | |||
| Age | 66±15.5 | 59.3±16.6 | 3.85* | 0.001 |
| Referral | ||||
| Early | 58 (22) | 206 (78) | 46.33 | 0.001 |
| Late | 76 (55.9) | 60 (44.1) | ||
| Gender | ||||
| Female | 62 (36.9) | 106 (63.1) | 1.5 | 0.22 |
| Male | 72 (31) | 160 (69) | ||
| Needed for RRT | 58 (46) | 68 (54) | 12.69 | <0.001 |
| Diabetes mellitus | 99 (88.2) | 160 (61.8) | 7.36 | 0.007 |
| Hypertension | 99 (36.1) | 175 (63.9) | 2.7 | 0.1 |
| Ischemic heart disease | 52 (46) | 61 (54) | 11.07 | 0.001 |
| Congestive heart failure | 28 (36.8) | 48 (63.2) | 0.47 | 0.493 |
| Cerebrovascular diseases | 27 (47.4) | 30 (52.6) | 5.73 | 0.017 |
| Chronic liver disease | 17 (63) | 10 (37) | 11.28 | 0.001 |
| Malignancy | 29 (35.8) | 52 (64.2) | 0.24 | 0.623 |
| Obstructive uropathy | 6 (15) | 34 (85) | 6.82 | 0.009 |
| Sepsis | 63 (51.2) | 60 (48.8) | 25.03 | 0.001 |
| CKD | 37 (26.4) | 103 (73.6) | 4.83 | 0.028 |
| Length of hospitalization (days) | 22.5±21.1 | 14.4±15.9 | 3.7 | <0.001 |
| SCr level on the day of referral (µmol/L) | 332±208.3 | 377.5±327.4 | 0.21 | 0.827 |
| SCr level on day 7 after referral (µmol/L) | 321.1±202.6 | 295.3±256.1 | 2.22 | 0.026 |
| Maximum SCr level during admission (µmol/L) | 437.9±211.4 | 456.1±391.0 | 1.92 | 0.054 |
| Latest SCr reading before death (µmol/L) | 354.5±191.1 | 270.5±235.6 | 5.53 | 0.001 |
| Blood urea nitrogen (mmol/L) | 27.9±15.5 | 21.5±15.5 | 4.63 | 0.001 |
| Serum potassium (mmol/L) | 4.3±0.9 | 4.3±0.8 | 0.02 | 0.891 |
| Serum sodium (mmol/L) | 138.1±12.5 | 136.0±6.7 | 1.81 | 0.07 |
RRT – Renal replacement therapy; SCr – Serum creatinine; CKD – Chronic kidney disease