Table 6.
Multivariate analysis of trends and factors associated with incidence for primary THA
| INCIDENCE OF HOSPITALIZATIONS FOR THA | ||||
|---|---|---|---|---|
| Risk Rate Ratios (95% Confidence Intervals)* | ||||
| Men | Women | Both | ||
| Age | 40-54 | - | - | - |
| 55-64 | 2.96(2.89-3.03) | 4.30 (4.17-4.43) | 3.40 (3.34-3.46) | |
| 65-74 | 5.65 (5.52-5.77) | 12.04 (11.71-12.38) | 7.84 (7.71-7.97) | |
| 75-84 | 5.98 (5.84-6.12) | 14.57 (14.17-14.98) | 9.09 (8.93-9.25) | |
| ≥85 | 2.37 (2.25-2.50) | 6.37 (6.14-6.21) | 3.97 (3.86-4.08) | |
| Sex | Women | NA | NA | - |
| Men | NA | NA | 1.03 (1.02-1.04) | |
| Reason for surgery | OA | - | - | - |
| Other | 0,21 (0,20-0,22) | 0,42 (0,41-0,43) | 0,32 (0,31-0,33) | |
| Charlson comorbidity index | 0 | - | - | - |
| 1-2 | 0.24 (0.24-0.25) | 0.25 (0.25-0.26) | 0.25 (0.24-0.25) | |
| >2 | 0.012 (0.011-0.013) | 0.008 (0.008-0.009) | 0.010 (0.009-0.011) | |
| YEAR | 2001 | - | - | - |
| 2002 | 1.04 (1.00-1.07) | 1.04 (1.01-1.07) | 1.04 (1.02-1.06) | |
| 2003 | 1.06 (1.03-1.09) | 1.04 (1.01-1.07) | 1.05 (1.03-1.07) | |
| 2004 | 1.04 (1.01-1.07) | 1.04 (1.01-1.07) | 1.04 (1.02-1.06) | |
| 2005 | 1.09 (1.06-1.12) | 1.04 (1.01-1.07) | 1.06 (1.04-1.08) | |
| 2006 | 1.11 (1.08-1.15) | 1.05 (1.02-1.08) | 1.08 (1.06-1.10) | |
| 2007 | 1.11 (1.08-1.15) | 1.04 (1.01-1.07) | 1.07 (1.05-1.09) | |
| 2008 | 1.15 (1.11-1.18) | 1.07 (1.04-1.09) | 1.10 (1.08-1.12) | |
Calculated using multivariate Poisson regression Dependent variable "Incidence of hospitalizations for THA".
The independent variables included in the models are those shown in the table.
OA Osteoarthritis