Table 2.
Equity rate ratios for access to care to knee replacement. Figures are adjusted rate ratios (95% confidence intervals)
| Sociodemographic model | Full model | |
|---|---|---|
| Sociodemographic characteristics | ||
| Age group (years): | ||
| 50-59 | 1.00 | 1.00 |
| 60-69 | 3.73 (3.59 to 3.87) | 3.73 (3.59 to 3.88) |
| 70-79 | 4.25 (4.09 to 4.40) | 4.25 (4.08 to 4.41) |
| 80-84 | 2.65 (2.53 to 2.77) | 2.65 (2.53 to 2.78) |
| ≥85 | 0.87 (0.82 to 0.93) | 0.87 (0.82 to 0.93) |
| P linear trend | <0.001 | <0.001 |
| Sex: | ||
| Female | 1.00 | 1.00 |
| Male | 1.31 (1.28 to 1.34) | 1.31 (1.28 to 1.34) |
| Index of multiple deprivation 2004*: | ||
| 1 (least deprived) | 1.00 | 1.00 |
| 2 | 0.75 (0.72 to 0.77) | 0.74 (0.72 to 0.77) |
| 3 | 0.65 (0.63 to 0.68) | 0.65 (0.63 to 0.68) |
| 4 | 0.43 (0.41 to 0.45) | 0.43 (0.41 to 0.45) |
| 5 (most deprived) | 0.32 (0.31 to 0.34) | 0.33 (0.31 to 0.34) |
| P linear trend | <0.001 | <0.001 |
| Ethnic mix of area: | ||
| White | 1.00 | 1.00 |
| Non-white | 1.03 (1.00 to 1.07) | 1.04 (1.00 to 1.07) |
| Rurality: | ||
| Urban ≥10 000 | 1.00 | 1.00 |
| Town and fringe | 0.77 (0.73 to 0.80) | 0.76 (0.73 to 0.79) |
| Village/isolated | 0.92 (0.89 to 0.97) | 0.92 (0.88 to 0.96) |
| P linear trend | <0.001 | <0.001 |
| Hospital trust characteristics | ||
| No of knee operations/year/hospital trust*: | ||
| 1 (30-204) | NA | 1.00 |
| 2 (205-263) | NA | 1.07 (1.02 to 1.13) |
| 3 (264-345) | NA | 1.05 (1.00 to 1.10) |
| 4 (352-495) | NA | 1.13 (1.07 to 1.19) |
| 5 (503-803) | NA | 1.08 (1.02 to 1.15) |
| P linear trend | — | <0.001 |
| Orthopaedic training centre status: | ||
| No | NA | 1.00 |
| Yes | NA | 1.10 (1.05 to 1.16) |
| Rate of all consultants per 100 000*: | ||
| 1 (4.36-30.02) | NA | 1.00 |
| 2 (30.43-35.35) | NA | 0.98 (0.93 to 1.04) |
| 3 (35.77-38.79) | NA | 0.94 (0.88 to 0.99) |
| 4 (39.04-47.48) | NA | 0.88 (0.83 to 0.93) |
| 5 (47.50-447.69) | NA | 0.92 (0.86 to 0.97) |
| P linear trend | — | <0.001 |
| Rate of trauma and orthopaedic consultants per 100 000*: | ||
| 1 (1.31-2.12) | NA | 1.00 |
| 2 (2.14-2.49) | NA | 0.96 (0.91 to 1.01) |
| 3 (2.50-2.73) | NA | 1.03 (0.97 to 1.08) |
| 4 (2.76-3.09) | NA | 1.00 (0.95 to 1.06) |
| 5 (3.09-11.17) | NA | 1.05 (0.99 to 1.11) |
| P linear trend | — | 0.012 |
| Rate of dedicated day case theatres per 100 000*: | ||
| 1 (0.00-0.42) | NA | 1.00 |
| 2 (0.42-0.67) | NA | 1.02 (0.97 to 1.08) |
| 3 (0.68-1.02) | NA | 1.04 (0.98 to 1.10) |
| 4 (1.03-1.40) | NA | 0.98 (0.93 to 1.04) |
| 5 (1.40-3.84) | NA | 1.11 (1.05 to 1.19) |
| P linear trend | — | 0.006 |
NA=variable not included in multivariable model.
*Fifths of distribution.