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Table 1 Frequency counts (and row percentages) for selected variables and stratified by 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)

  Total Hip Replacement Total Knee Replacement
Age   
65-69 yr 23405 (25.2) 63363 (28.3)
70-74 yr 24888 (26.7) 63608 (28.5)
75-79 yr 23316 (25.0) 54578 (24.4)
≥80 yr 21462 (23.1) 42051 (18.8)
Gender   
Male 34578 (37.2) 78539 (35.1)
Female 58492 (62.8) 145061 (64.9)
Comorbid Diseases   
Cerebrovascular Disease (CVD) alone 570 (0.6) 1356 (0.6)
Coronary Artery Disease (CAD) alone 9132 (9.8) 20017 (9.0)
Congestive Heart Failure (CHF) alone 1097 (1.2) 2746 (1.2)
Diabetes alone 7782 (8.4) 26740 (12.0)
Chronic Obstructive Pulmonary Disease (COPD) alone 7989 (8.6) 16836 (7.5)
CAD and CHF alone 731 (0.8) 1678 (0.8)
CAD and COPD alone 1731 (1.9) 3366 (1.5)
CAD and Diabetes alone 2320 (2.5) 7155 (3.2)
COPD and Diabetes alone 1181 (1.3) 3688 (1.7)
All other 2+ combinations 2725 (2.9) 6878 (3.1)
None of the above comorbidities 57813 (62.0) 133140 (59.4)
Median Length of Stay (days) 4 3