Table 1.
Basic characteristics of the study population, showing absolute numbers (%) for proportions and mean (SD) for continuous variables. The number of patients with missing observations is presented as percentages of the total for that particular group
| Variable | Women (n = 16,322) |
Men (n = 12,263) |
|---|---|---|
| Age (SD) | 70 (10) | 67 (10) |
| Pain VAS, mm | ||
| Mean (SD) | 64 (16) | 59 (16) |
| Missing | 2 (0%) | 5 (0%) |
| Charnley class | ||
| A | 7,145 (44%) | 6,604 (54%) |
| B | 1,788 (11%) | 1,262 (10%) |
| C | 7,387 (45%) | 4,396 (36%) |
| Missing | 2 (0%) | 1 (0%) |
| Previous contralateral THR | ||
| No | 13,010 (80%) | 10,102 (82%) |
| Yes | 3,312 (20%) | 2,161 (18%) |
| HRQoL estimates | ||
| EQ-5D index (preoperative) | ||
| Mean (SD) | 0.72 (0.12) | 0.75 (0.11) |
| Missing | 7 (0%) | 8 (0%) |
| EQ-5D index (1 year) | ||
| Mean (SD) | 0.87 (0.11) | 0.89 (0.10) |
| Missing | 1,292 (8%) | 1,015 (8%) |
| EQ VAS (preoperative) | ||
| Mean (SD) | 52 (22) | 58 (22) |
| Missing | 14 (0%) | 11 (0%) |
| EQ VAS (1 year) | ||
| Mean (SD) | 75 (21) | 78 (19) |
| Missing | 1,294 (8%) | 1,014 (8%) |