Table 1.
Baseline Cohort Demographics.
| Variable | All Patients (n = 10,302) |
|---|---|
| Median (IQR) | |
| Age (years) | 71 (12) |
| Hospital volume† | 103 (141) |
| Number (%) | |
| Male | 4727 (45.88) |
| Race | |
| White | 8835 (85.76) |
| Black | 333 (3.23) |
| Asian / Pacific Islander | 215 (2.09) |
| Native American | 51 (0.49) |
| Other | 777 (7.54) |
| Unknown | 91 (0.88) |
| Ethnicity | |
| Non-Hispanic | 8900 (86.39) |
| Hispanic | 1309 (12.71) |
| Unknown | 93 (0.90) |
| Insurance | |
| Medicare | 7433 (72.15) |
| Private | 1831 (17.77) |
| Medi-Cal | 393 (3.81) |
| Workers’ compensation | 518 (5.02) |
| Other | 127 (1.23) |
| Medical comorbidities | |
| Diabetes mellitus without complications | 739 (7.17) |
| Diabetes mellitus with complications | 662 (6.43) |
| Coronary atherosclerosis | 719 (6.98) |
| Morbid obesity | 664 (6.45) |
| COPD | 700 (6.79) |
| Chronic kidney disease, mild | 682 (6.62) |
| Chronic kidney disease, moderate | 621 (6.03) |
| Chronic kidney disease, severe | 553 (5.37) |
| Chronic kidney disease requiring dialysis | 549 (5.33) |
| Vascular disease | 662 (6.43) |
| Other circulatory disease | 623 (6.05) |
| Acute renal failure | 650 (6.31) |
| Cardio-respiratory failure | 603 (5.85) |
| Major depressive or bipolar disorder | 636 (6.17) |
| Major fracture (except skull) | 574 (5.57) |
| Hip fracture or dislocation | 554 (5.38) |
| Protein-calorie malnutrition | 573 (5.56) |
| Metastatic cancer or leukemia | 544 (5.28) |
| Complications of implants | 708 (6.87) |
| History of prior complications | 595 (5.78) |
| Osteoarthritis of hip or knee | 737 (7.15) |
| Osteoporosis | 667 (6.47) |
| History of bone/joint/muscle infection | 589 (5.72) |
| Mean (SD) | |
| Number of comorbidities | 0.34 (1.19) |
IQR = interquartile range; COPD = chronic obstructive pulmonary disease; SD = standard deviation
† Cases of primary aTSA performed between 10/1/2015 and 12/13/2017