Table 1.
Baseline demographic and surgical data. Age is presented as mean (SD). All other numbers are given as n (%)
| Newly introduced designs | All hips | ||
|---|---|---|---|
| Data | n = 52,903 | n = 251,638 | p-valuea |
| Age, mean (SD) | 67 (12) | 70 (11) | < 0.001 |
| Sex | < 0.001 | ||
| Female | 30,505 (58) | 149,662 (59) | |
| Male | 22,398 (42) | 101,976 (41) | |
| Diagnosis | < 0.001 | ||
| Primary | |||
| osteoarthritis | 43,373 (82) | 199,708 (79) | |
| Femoral neck | |||
| fracture | 3,770 (7) | 26,312 (10) | |
| Others | 5,760 (11) | 25,618 (10) | |
| Surgery | < 0.001 | ||
| Primary | 48,331 (91) | 236,053 (94) | |
| Revision | 4,572 (9) | 15,585 (6) | |
| Hospital typeb | < 0.001 | ||
| University | 11,280 (21) | 39,285 (16) | |
| County | 19,200 (36) | 95,638 (38) | |
| Rural | 13,798 (26) | 90,401 (36) | |
| Private | 8,625 (16) | 26,306 (10) | |
| Abroad | - - | 4 (0) | |
| Cup fixationc | < 0.001 | ||
| Cemented | 34,968 (66) | 218,846 (87) | |
| Uncemented | 17,935 (34) | 29,455 (12) | |
| Resurfacing | - - | 2,678 (1) | |
| Others | - - | 4 (0) |
a
The p-values are for nonparametric tests comparing the novel design group with all other designs used in THA and first-time revisions reported to the SHAR during the years 1993–2011.
b
4 hips with missing information on hospital type.
c
655 hips with missing information on cup fixation method.