Table 1.

Characteristics of 24-hour survivors versus nonsurvivors at time of eventa

CharacteristicNonsurvivors (n = 419)Survivors (n = 310)P
Male gender (n [%])231 (55.1)153 (49.4)0.12
Age (yr [SD])68.0 (13.5)66.3 (13.3)0.09
Ethnicity (n [%])0.93
    black164 (39.14)115 (37.1)
    white189 (45.11)147 (47.42)
    Hispanic33 (7.88)25 (8.06)
    other33 (7.88)23 (7.42)
Comorbidities (n [%])
    diabetes174 (41.5)134 (43.5)0.59
    congestive heart failure44 (10.5)31 (10.0)0.83
    coronary artery disease32 (7.6)30 (9.7)0.33
    hypertension200 (48.0)140 (45.2)0.45
Documented cause of renal disease (n [%])0.77
    diabetes166 (39.6)128 (41.3)
    glomerulonephritis22 (5.3)16 (5.2)
    hypertension109 (26.0)70 (22.6)
    polycystic kidney disease9 (2.2)5 (1.6)
    other/unknown113 (27.0)91 (29.4)
Years on dialysis (median [IQR])2.3 (0.9 to 4.8)2.6 (1.0 to 5.0)0.26
Dialysis dosage before event (mean [SD])
    urea reduction ratio0.71 (0.1)0.70 (0.1)0.76
Dialysis access (n [%])
    catheter151 (40.2)91 (34.0)0.11
Day of week (n [%])0.76
    first hemodialysis day (Monday/Tuesday)157 (37.5)105 (33.9)
    second hemodialysis day (Wednesday/Thursday)132 (31.5)101 (32.6)
    third hemodialysis day (Friday/Saturday)127 (30.3)100 (32.3)
Dialysate [K] (n [%])0.10
    ≤1 mEq/L80 (17.4)69 (22.7)
    2 mEq/L299 (65.1)176 (57.9)
    ≥3 mEq/L80 (17.4)59 (19.4)
Dialysate [Ca] (n [%])
    ≤2 mEq/L54 (13.0)55 (18.1)0.06
Prescribed dry weight (kg [SD])75.8 (20)73.1 (20)0.97
Prescribed medications (n [%])
    ACE inhibitor or ARB152 (39.0)142 (48.0)0.02
    BBL156 (40.0)157 (53.0)0.0007
    statin119 (30.5)88 (29.7)0.82
    ASA142 (36.4)112 (37.8)0.70
    CCB126 (32.3)116 (39.2)0.06
    other antiarrhythmic99 (25.4)95 (32.1)0.05
Dialysis multivitamin231 (58.9)175 (59.1)0.96
Last measured laboratory values before event (mean [SD])
    albumin (mg/dl)3.5 (0.5)3.6 (0.5)0.17
    creatinine (mg/dl)7.3 (3.0)6.9 (2.7)0.14
    potassium (mEq/L)4.7 (0.9)4.6 (0.9)0.12
    calcium (mg/dl)9.2 (0.9)9.2 (1.0)0.48
    phosphorus (mg/dl)5.4 (1.8)5.2 (1.8)0.33
    calcium × phosphorus49.3 (16.9)47.8 (17.5)0.30
    hemoglobin (g/dl)11.3 (1.5)11.1 (1.5)0.04
    intact 7-84 PTH (pg/ml; median [IQR])207 (105 to 375)242 (117 to 404)0.26
  • a ACE, angiotensin-converting enzyme; ARB, angiotensin receptor blocker; BBL, β blocker; BUN, blood urea nitrogen; [Ca], calcium concentration; CCB, calcium channel blocker; CO2, total CO2; IQR, interquartile range; [K], potassium concentration; PTH, parathyroid hormone.