Table 2 Variables of the prehospital course and at hospital presentation, and univariate Cox proportional analysis for all-cause death
|  | Total (n = 68) | Hazard ratio | p |
|---|---|---|---|
Prehospital course | |||
 >72 h from onset to arrival, n (%) | 13 (19.1) | 0.90 | 0.83 |
 Time of hospital presentation, n (%) | |||
  - 8 am to 4 pm | 10 (14.7) | 1.88 | 0.17 |
  - 4 pm to midnight | 22 (32.4) | 1.96 | 0.07 |
  - Midnight to 8 am | 36 (52.9) | 0.38 | 0.007†|
 2-day interdialytic gap, n (%) | 37 (54.4) | 1.09 | 0.81 |
 Body weight gain (kg) | 2.0 (1.0–4.0) | 1.00 | 0.95 |
 Body weight gain rate (%) | 4.1 (1.4–6.0) | 1.01 | 0.84 |
Vital signs | |||
 Systolic blood pressure (mmHg) | 182 (159–205) | 0.99 | 0.04†|
 Diastolic blood pressure (mmHg) | 94 (72–115) | 0.99 | 0.13 |
 Heart rate (bpm) | 102 (90–116) | 0.98 | 0.15 |
 Respiratory rate (/minute) | 26 (21–30) | 0.97 | 0.35 |
 Saturation of peripheral oxygen (%) | 97 (92–99) | 0.98 | 0.42 |
Arterial blood gases | |||
 pH | 7.37 (7.26–7.44) | 6.98 | 0.19 |
 pCO2 (mmHg) | 38.8 (34.5–50.6) | 0.99 | 0.26 |
 pO2 (mmHg) | 83.4 (61.4–97.5) | 1.00 | 0.72 |
 HCO3− (mmol/l) | 22.1 (19.6–24.6) | 1.03 | 0.60 |
Echocardiographic variables (Teichholz method) | |||
 LVEDVI (ml/m2) | 77.6 (62.8–97.8) | 1.00 | 0.53 |
 LVESVI (ml/m2) | 36.9 (25.9–50.1) | 1.00 | 0.73 |
 Left ventricular ejection fraction (%) | 53 (41.3–61) | 0.99 | 0.61 |
 Left ventricular mass index (g/m2) | 158 (133–190.5) | 1.00 | 0.47 |
Electrocardiographic variables | |||
 Atrial fibrillation rhythm, n (%) | 10 (14.7) | 3.34 | 0.01* |
 Artificially paced, n (%) | 0 (0) | NA | NA |
 Left ventricular hypertrophy, n (%) | 12 (17.6) | 1.22 | 0.65 |
 QRS duration (ms) | 112 (101.5–120) | 1.01 | 0.41 |
Laboratory findings | |||
 White blood cell count (×103/μl) | 10.2 (7.7–12.4) | 0.97 | 0.56 |
 Hematocrit (%) | 34.4 ± 5.3 | 0.92 | 0.03†|
 Platelet count (×103/μl) | 213.2 ± 69.2 | 0.99 | 0.07 |
 Blood urea nitrogen (mg/dl) | 47.0 ± 16.1 | 1.00 | 0.66 |
 Creatinine (mg/dl) | 8.1 ± 2.3 | 0.88 | 0.08 |
 Aspartate aminotransferase (U/l) | 20 (15–30) | 1.01 | 0.16 |
 Alanine aminotransferase (U/l) | 14 (8–17) | 1.01 | 0.10 |
 Albumin (g/dl) | 3.7 ± 0.4 | 0.28 | 0.007†|
 Blood glucose (mg/dl) | 161 (120.3–217.3) | 1.00 | 0.31 |
 Sodium (mmol/l) | 139.1 ± 3.1 | 0.93 | 0.17 |
 Potassium (mmol/l) | 4.8 (4.3–5.4) | 1.04 | 0.84 |
 Chloride (mmol/l) | 102.0 ± 3.2 | 0.95 | 0.31 |
 Calcium (mg/dl), n = 61 | 8.9 ± 0.7 | 0.98 | 0.96 |
 Phosphate (mg/dl), n = 56 | 5.0 (3.6–5.8) | 1.06 | 0.61 |
 C-reactive protein (mg/dl) | 0.53 (0.15–1.85) | 1.01 | 0.89 |