Table 1.
Study Sample Characteristics by Bariatric Surgery Status, 2005–2011
| Group 1 Bariatric Surgery >2 Yrs Prior to TJA (N=69) |
Group 2 Bariatric Surgery w/in 2 Yrs of TJA (N=102) |
Group 3 No Bariatric Surgery (BMI≥40 or BMI≥35 and Osteoarthritis +1 co-morbidity) (N=11032) |
||
|---|---|---|---|---|
| N (%) | N (%) | N (%) | ||
| Procedure | THA | 7 (10.1) | 30 (29.4) | 2616 (23.7) |
| TKA | 62 (89.9) | 72 (70.6) | 8416 (76.3) | |
| Gender | Female | 52 (75.4) | 80 (78.4) | 7496 (68.0) |
| Male | 17 (24.6) | 22 (21.6) | 3536 (32.1) | |
| Age category, years | <65 | 49 (71.0) | 93 (91.2) | 5918 (53.6) |
| ≥65 | 20 (29.0) | 9 (8.8) | 5114 (46.4) | |
| Race | Asian | 3 (4.4) | 4 (3.9) | 238 (2.2) |
| Black | 7 (10.1) | 13 (12.8) | 1570 (14.2) | |
| Hispanic | 14 (20.3) | 12 (11.8) | 1753 (15.9) | |
| Other/Multi | 2 (2.9) | 0 (0.0) | 170 (1.5) | |
| Unknown | 0 (0.0) | 0 (0.0) | 108 (1.0) | |
| White | 43 (62.3) | 73 (71.6) | 7193 (65.2) | |
| Diabetes (ever) | 23 (33.3) | 38 (37.3) | 5231 (47.4) | |
| ASA category at TJA | 1&2 | 38 (55.1) | 70 (68.6) | 4315 (39.1) |
| ≥3 | 31 (44.9) | 32 (31.4) | 6598 (59.8) | |
| Unknown | 0 (0.0) | 0 (0.0) | 119 (1.1) | |
| Length of Stay, days (mean, SD) | 2.7 (0.8) | 2.9 (0.8) | 3.0 (1.4) | |
| Age, years (mean, SD) | 59.9 (7.8) | 57.0 (6.8) | 63.8 (8.7) | |
| BMI, kg/m2 at TJA (mean, SD) | 34.6 (6.2) | 32.4 (4.7) | 40.0 (4.4) | |
| Follow up after TJA, days (mean, SD) | 320 (259) | 691 (457) | 1076 (717) | |
BMI=Body mass index. TJA=Total joint arthroplasty. THA=Total hip arthroplasty. TKA=Total knee arthroplasty. SD=Standard deviation.