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Table 2.37
Percent of patients with adverse drug events: anticoagulant related warfarin, United States, 2004 and 2005a
Population group 2005 2004
Exposed Adverse events Percent Standard error Exposed Adverse events Percent Standard error
Total   3,847 265 6.89 0.41 3,629 318 8.76 0.47
Age Under 65 365 24 6.58 1.30 345 32 9.28 1.56
65-74 1,195 87 7.28 0.75 1,203 87 7.23 0.75
75-84 1,627 108 6.64 0.62 1,499 135 9.01 0.74
85 and over 660 46 6.97 0.99 582 64 11.00 1.30
Gender Male 1,684 114 6.77 0.61 1,576 135 8.57 0.71
Female 2,163 151 6.98 0.55 2,053 183 8.91 0.63
Race White 3,482 241 6.92 0.43 3,284 289 8.80 0.49
Black 256 17 6.64 1.56 229 18 7.86 1.78
Other DSU DSU DSU DSU 116 11 9.48 2.72
Diabetes Yes 1,221 88 7.21 0.74 1,175 113 9.62 0.86
No 2,626 177 6.74 0.49 2,454 205 8.35 0.56
Obesity Yes 482 41 8.51 1.27 465 42 9.03 1.33
No 3,365 224 6.66 0.43 3,164 276 8.72 0.50
Cerebrovascular disease Yes 1,041 83 7.97 0.84 1,012 88 8.70 0.89
No 2,806 182 6.49 0.46 2,617 230 8.79 0.55
CHF/pulmonary edema Yes 1,616 122 7.55 0.66 1,523 153 10.05 0.77
No 2,231 143 6.41 0.52 2,106 165 7.83 0.59
COPD Yes 1,223 95 7.77 0.77 1,116 118 10.57 0.92
No 2,624 170 6.48 0.48 2,513 200 7.96 0.54
Smoking Yes 383 26 6.79 1.29 401 35 8.73 1.41
No 3,464 239 6.90 0.43 3,228 283 8.77 0.50
Cancer Yes DNA DNA DNA DNA 864 92 10.65 1.05
No DNA DNA DNA DNA 2,765 226 8.17 0.52
Corticosteroids Yes 350 38 10.86 1.66 289 41 14.19 2.05
No 3,497 227 6.49 0.42 3,340 277 8.29 0.48
Coronary artery disease Yes 1,851 125 6.75 0.58 1,798 191 10.62 0.73
No 1,996 140 7.01 0.57 1,831 127 6.94 0.59
Renal disease Yes 1,008 114 11.31 1.00 818 108 13.20 1.18
No 2,839 151 5.32 0.42 2,811 210 7.47 0.50

a Data include Medicare beneficiaries discharged from January to December.

DNA - Data have not been analyzed.

DSU - Data do not meet the criteria for statistical reliability, data quality, or confidentiality.

Key: CHF: congestive heart failure; COPD: chronic obstructive pulmonary disease.

Source: Centers for Medicare & Medicaid Services, Medicare Patient Safety Monitoring System.

 
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