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Table 2 Frequency counts for selected variables stratified by age and surgical procedure.

From: Risk of venous thromboembolism after total hip and knee replacement in older adults with comorbidity and co-occurring comorbidities in the Nationwide Inpatient Sample (2003-2006)

  Age Group
  Hip Procedures Knee Procedures
Exposure 65-69 years of age 70-74 years of age 75-79 years of age ≥80 years of age total 65-69 years of age 70-74 years of age 75-79 years of age ≥80 years of age total
CVD alone 87 129 160 194 570 241 342 382 391 1356
CAD alone 1677 2269 2503 2683 9132 4065 5413 5608 4931 20017
CHF alone 143 209 277 468 1097 441 574 702 1029 2746
Diabetes alone 2159 2229 1935 1459 7782 8975 8197 6116 3452 26740
COPD alone 2110 2220 1949 1710 7989 4978 4873 4065 2920 16836
CAD and CHF alone 87 124 190 330 731 249 335 449 645 1678
CAD and COPD alone 359 443 485 444 1731 726 937 978 725 3366
CAD and Diabetes alone 512 673 632 503 2320 1909 2216 1906 1124 7155
COPD and Diabetes alone 341 356 298 186 1181 1359 1148 772 409 3688
All other 2+ combinations 482 673 763 807 2725 1593 1904 1896 1485 6878
None of the above comorbidities 15448 15563 14124 12678 57813 38827 37669 31704 24940 133140
  1. Abbreviations: CAD = coronary artery disease, CHF = congestive heart failure, COPD = chronic obstructive pulmonary disease, CVD = cerebrovascular disease.