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Demographics and length of stay for primary and revision THA patients included in the study
| Variable | Primary THA | Revision THA |
|---|---|---|
| Age, mean (range) | 66 (18−98) | 69 (34−96) |
| Women, number (%) | 2,294 (64) | 272 (67) |
| BMI, mean (range) | 27 (14−52) | 27 (14−43) |
| Length of stay (days), mean (range) | 2.7 (1−28) | 3.8 (1−32) |
| ASA class, number (%) | ||
| I | 653 (19) | 26 (7) |
| II | 2058 (59) | 236 (61) |
| III | 730 (21) | 121 (31) |
| IV | 31 (1) | 4 (1) |
ASA = American Society of Anesthesiologists.
