Table 2.
Patient demographics for the National Joint Registry population studied, by implant group
| Cemented |
Hybrid |
Cementless |
Resurfacing |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Best | Others | Best | Others | Best | Others | Best | Others | p-value a | |
| Number (%) | 885 (4) | 667 (3) | 1,140 (5) | 2,098 (9) | 920 (4) | 8,597 (35) | 6,679 (27) | 3,723 (15) | |
| Age, median (range) | 56 (23–60) | 57 (26–60) | 54 (18–60) | 55 (20–60) | 57 (27–60) | 54 (16–60) | 52 (19–60) | 52 (19–60) | < 0.001 |
| Females, n (%) | 548 (62) | 412 (62) | 642 (56) | 1,340 (64) | 454 (49) | 4,880 (57) | 432 (7) | 2,914 (78) | < 0.001 |
| ASA, n (%) b | |||||||||
| 1 | 263 (30) | 193 (29) | 430 (38) | 677 (32) | 252 (27) | 2,815 (33) | 3,750 (56) | 1,969 (53) | < 0.001 |
| 2 | 543 (61) | 421 (63) | 664 (58) | 1,246 (59) | 603 (66) | 5,233 (61) | 2,748 (41) | 1,677 (45) | |
| 3+ | 79 (9) | 53 (8) | 46 (4) | 175 (8) | 65 (7) | 549 (6) | 181 (3) | 77 (2) | |
| BMI, mean (SD) (range) c | 30 (6) | 30 (5) | 30 (5) | 30 (6) | 30 (5) | 30 (5) | 29 (4) | 28 (5) | < 0.001 |
| (18–59) | (16–50) | (18–56) | (16–54) | (17–52) | (16–65) | (16–51) | (16–63) | ||
a
Differences between groups. Statistical notes: 1-way analysis of variance (ANOVA) was used for normally distributed data, Kruskal-Wallis test for non-normally distributed data, and chi-squared test for proportions;
b
ASA: American Society of Anaesthesiologists;
c
BMI: body mass index, kg/m2 (data based on 9,544 procedures (39%)).