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Table 2 Variables of the prehospital course and at hospital presentation, and univariate Cox proportional analysis for all-cause death

From: Effect of cardiovascular risk factors and time of hospital presentation on mortality of maintenance hemodialysis patients presenting with acute pulmonary edema

  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
  1. Continuous variables are shown as the mean ± SD or median (first to third quartile) and categorical variables as number (%)
  2. LVEDVI left ventricular end-diastolic volume index, LVESVI left ventricular end-systolic volume index, NA not analyzed
  3. *p<0.05 with a positive association, p<0.05 with a negative association