Table 3.

Characteristics of calcium carbonate and calcium acetate users

Full CohortPropensity Score–Matched Cohort
Calcium Carbonate (n = 1443)Calcium Acetate (n = 1229)PCalcium Carbonate (n = 1139)Calcium Acetate (n = 1139)P
Age58.1 (±15.5)58.1 (±15.8)0.9658.1 (±15.6)58.3 (±15.8)0.77
Women47.943.90.0446.145.4
Race
    white65.368.067.967.3
    black28.826.026.626.7
    Asian3.63.63.33.7
    Native American1.40.61.20.6
    other00.10.041.01.70.34
Hispanic ethnicity11.211.70.6511.711.30.79
Education (263 missing)
    <high school31.134.633.032.8
    high school grad34.534.634.135.3
    some college18.016.417.817.1
    college graduate16.414.10.2015.014.80.94
Marital status
    married56.053.755.154.7
    not married15.615.915.115.3
    divorced/separated28.430.40.4529.830.00.98
Living
    not alone78.678.879.078.7
    alone16.516.416.116.4
    other4.94.90.994.94.90.97
Hemodialysis versus peritoneal dialysis52.257.40.0356.556.00.77
Suspected native kidney disease
    glomerulonephritis9.19.29.28.9
    diabetes42.443.543.343.3
    hypertension26.325.225.925.9
    other22.222.10.9221.921.60.99
Comorbid conditions
    coronary artery disease34.736.40.3735.736.10.79
    congestive heart failure33.836.10.2135.635.70.93
    chronic obstructive lung disease6.78.10.197.67.30.81
    cerebrovascular disease8.78.20.648.98.40.71
    history of cardiac arrest1.71.20.341.41.30.86
    hypertension70.369.80.8069.969.91.00
    diabetes47.647.40.9347.847.81.00
    HIV1.21.30.771.11.10.84
    malignancy8.08.10.878.18.30.88
    peripheral artery vascular disease16.117.40.3316.917.60.70
Systolic BP (n = 2627)147 (±20)148 (±21)0.25147 (±20)147 (±21)0.93
Diastolic BP (n = 2627)80 (±12)80 (±12)0.3180 (±11)80 (±12)0.95
Laboratory measurements
    phosphate (n = 2569)5.5 (±1.8)5.7 (±1.9)0.015.6 (±1.8)5.6 (±1.8)0.73
    calcium (n = 2574)8.6 (±1.1)8.7 (±1.0)0.098.7 (±1.0)8.7 (±1.0)0.39
    parathyroid hormone (n = 2143)318 (±370)314 (±313)0.80311 (±311)313 (±304)0.86
    parathyroid hormone (n = 2143)25%: 10125%: 10325%: 10325%: 102
50%: 21850%: 21450%: 22050%: 217
75%: 41075%: 42875%: 40975%: 428
    total cholesterol (n = 2456)195 (±54)193 (±53)0.45194 (±55)193 (±52)0.84
    triglycerides (n = 2080)195 (±129)203 (±134)0.15195 (±125)198 (±121)0.64
Other medication use
    statins10.910.90.9810.510.80.84
    ACE/ARBs27.426.40.5625.926.90.60
    beta blockers20.720.80.9520.221.30.50
Propensity score0.46 (±0.06)0.46 (±0.06)0.95
  • All data are presented in column percent or in mean (± standard deviation) unless indicated otherwise.