Table 2.
Demographic predictors of surgical rates
| Predictor | Procedure | Reference | Categories | Effect size | 95% Confidence interval | p | Comment |
|---|---|---|---|---|---|---|---|
| Age | TJA | 18 | 65+ to 51–64 | HR, 2.34 | (1.23–4.29) | ||
| TJA | 19 | 70–79 to 80+ | OR, 1.69 | (1.12–2.56) | |||
| TJA | 27 | 63–68 to 62– | HR, 1.47 | (1.03–2.10) | 0.001 | Inverted U-shaped | |
| TJA | 47 | 65–74 to 60–64 | OR, 1.06 | (0.64–1.76) | 0.81 | Inverted U-shaped | |
| THA | 2 | 65–74 to 75+ | RR, 2.2–2.7 | N/R | N/R | Income quintiles | |
| THA | 17 | 65–84 | r, 0.72 | 0.045 | Inverted U-shaped | ||
| THA | 30 | 70–74 to 50–54 | RR, 6.92 | (6.55–7.31) | 0.001 | Inverted U-shaped | |
| THA | 52 | per year | HR, 1.07 | (1.06–1.09) | 0.001 | ||
| TKA | 13 | 75–79 to 54– | OR, 106.2 | < 0.001 | Inverted U-shaped | ||
| TKA | 17 | 65–84 | r, 0.48 | 0.23 | Inverted U-shaped | ||
| TKA | 25 | 47–64 to 65+ | OR, 0.72 | (0.52–1.01) | |||
| TKA | 30 | 75–79 to 50–54 | RR, 14.95 | (13.99–15.98) | 0.001 | Inverted U-shaped | |
| TKA | 32 | 75–79 to 65–69 | OR, 1.41 | ||||
| TKA | 52 | per year | HR, 1.08 | (1.07–1.10) | 0.001 | ||
| TKA | 61 | %pop > 75y | β, 115.6 | < 0.001 | Linear regression parameter | ||
| LSS | 7 | 70–74 to 80+ | IRR, 2.17 | (1.95–2.42) | < 0.001 | Inverted U-shaped | |
| Gender | TJA | 18 | F to M | HR, 1.16 | (0.88–1.41) | ||
| TJA | 27 | F to M | HR, 1.09 | (0.81–1.45) | 0.57 | ||
| TJA | 47 | F to M | OR, 0.97 | (0.61–1.54) | 0.91 | ||
| THA | 2 | F to M | RR, 1.5–1.6 | N/R | Income quintiles | ||
| THA | 30 | F to M | RR, 1.30 | (1.28–1.33) | |||
| THA | 52 | F to M | HR, 1.06 | (0.88–1.28) | 0.55 | ||
| TKA | 13 | F to M | OR, 1.331 | < 0.001 | |||
| TKA | 25 | F to M | OR, 1.26 | (1.08–1.48) | |||
| TKA | 30 | F to M | RR, 1.10 | (1.08–1.12) | |||
| TKA | 32 | F to M | OR, 1.95 | ||||
| TKA | 46 | F to M | OR, 1.32 | (1.30–1.33) | <0.001 | ||
| TKA | 52 | F to M | HR, 1.08 | (0.90–1.29) | 0.42 | ||
| TKA | 60 | F to M | RR, 1.37 | For whites | |||
| TKA | 60 | F to M | RR, 3.03 | For blacks | |||
| LSS | 7 | F to M | IRR, 0.84 | (0.79–0.89) | < 0.001 |
TJA = total joint arthroplasty; HR, hazard ratio; OR, odds ratio; RR, rate ratio; r = correlation coefficient; β = regression parameter; IRR = incidence rate ratio; N/R = not reported.