Table 1.
Demographics
| Characteristic | Stemmed | Standard | p-value |
|---|---|---|---|
| Total knee arthroplasty | 50 | 128 | |
| Age (yr) | 61±8.8 | 62±8.7 | 0.49 |
| Female | 43 (86) | 102 (79) | 0.33 |
| Right side | 24 (48) | 67 (52) | 0.60 |
| Smaller size tibial componenta) | 38 (76) | 77 (60) | 0.047 |
| Time to follow-up (mo) | 30±3.8 | 34±5.2 | <0.001 |
| Body mass index (kg/m2) | 44.4±6.1 | 39.8±4.1 | <0.001 |
| 35–39 (WHO class II) | 9 (18) | 70 (55) | |
| ≥40 (WHO class III) | 41 (82) | 58 (45) | |
| 40–44 | 22 | 31 | |
| 45–49 | 12 | 15 | |
| 50–54 | 3 | 2 | |
| 55–60 | 4 | 0 | |
| Rheumatoid arthritis | 0 | 4 (3) | 0.26 |
| Tobacco use | |||
| Active | 4 (8) | 15 (12) | 0.59 |
| Former | 13 (26) | 43 (34) | 0.37 |
| Osteopenia or osteoporosis | 2 (4) | 10 (8) | 0.29 |
| Diabetes mellitus | 16 (32) | 34 (27) | 0.47 |
Values are presented as mean±standard deviation or number (%).
WHO: World Health Organization.
a)
Defined as lower half of offered manufactured sizes (NexGen size, 1–4; Persona size, A–D).