Table 3 Hospital district variance (σ2) and its 95% credible interval (CI 95%) in elective primary total hip and knee arthroplasty in Finland for years 2010 − 2013 and 2014 − 2017, the proportion of variance explained (PCV) and Median Rate Ratio (MRR) when adding variables to the models
2010–2013 | 2014–2017 | |||||
|---|---|---|---|---|---|---|
Hip arthroplasty | σ2 (CI 95%) | PCV | MRR (CI 95%) | σ2 (CI 95%) | PCV | MRR (CI 95%) |
M0 Null model | 0.007 (0.003–0.015) | – | 1.08 (1.06–1.12) | 0.009 (0.004–0.019) | – | 1.09 (1.06–1.14) |
M1 + Comorbidity | 0.007 (0.003–0.014) | 4.0 | 1.08 (1.06–1.12) | 0.009 (0.004–0.018) | 0.3 | 1.09 (1.07–1.14) |
M2 + Education | 0.006 (0.003–0.013) | 13.6 | 1.08 (1.05–1.12) | 0.009 (0.004–0.019) | -0.2 | 1.09 (1.07–1.14) |
M3 + Occupation | 0.006 (0.003–0.012) | 17.9 | 1.07 (1.05–1.11) | 0.008 (0.004–0.018) | 2.6 | 1.09 (1.06–1.14) |
M4 + Income | 0.006 (0.003–0.013) | 13.3 | 1.08 (1.05–1.12) | 0.009 (0.004–0.019) | -1.6 | 1.09 (1.07–1.14) |
M5 + MSD Index | 0.003 (0.001–0.007) | 57.7 | 1.05 (1.03–1.08) | 0.008 (0.004–0.018) | 3.1 | 1.09 (1.06–1.14) |
Knee arthroplasty | ||||||
M0 Null model | 0.024 (0.013–0.051) | – | 1.16 (1.11–1.24) | 0.016 (0.008–0.033) | – | 1.13 (1.09–1.19) |
M1 + Comorbidity | 0.024 (0.013–0.050) | -0.7 | 1.16 (1.11–1.24) | 0.016 (0.009–0.034) | -4.9 | 1.13 (1.09–1.19) |
M2 + Education | 0.023 (0.012–0.048) | 4.5 | 1.16 (1.11–1.23) | 0.016 (0.009–0.035) | -4.7 | 1.13 (1.09–1.19) |
M3 + Occupation | 0.022 (0.012–0.046) | 9.3 | 1.15 (1.11–1.23) | 0.016 (0.009–0.033) | -2.2 | 1.13 (1.09–1.19) |
M4 + Income | 0.023 (0.013–0.049) | 3.3 | 1.16 (1.11–1.24) | 0.017 (0.009–0.036) | -9.0 | 1.13 (1.09–1.20) |
M5 + MSD Index | 0.018 (0.009–0.039) | 25.4 | 1.14 (1.10–1.21) | 0.013 (0.007–0.029) | 15.7 | 1.12 (1.08–1.17) |