Numbers of orthopedic surgeries performed per 1000 patients in a nationwide, multicenter, observational cohort database of rheumatic diseases in Japan (NinJa) for each year from 2004 to 2014.
| Year | Total No. Surgeries | THA | TKA | TSA | TEA | TAA | Surgeries Other than Large Joint Arthroplasties | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Spine | Osteoporotic Fracture | Hip and Knee | Shoulder and Elbow | Hand and Wrist | Foot and Ankle | Others | |||||||
| 2004 | 72.2 | 8.5 | 30.1 | 0.0 | 3.0 | 0.0 | 3.0 | 2.5 | 1.7 | 2.2 | 9.7 | 8.0 | 3.5 |
| 2005 | 70.6 | 10.6 | 26.9 | 1.1 | 3.7 | 0.2 | 1.5 | 5.0 | 1.5 | 0.6 | 9.3 | 9.5 | 0.9 |
| 2006 | 66.3 | 9.4 | 24.3 | 0.6 | 5.7 | 0.2 | 2.0 | 3.5 | 2.0 | 1.0 | 7.8 | 7.8 | 2.0 |
| 2007 | 59.0 | 8.1 | 22.0 | 0.4 | 2.3 | 0.9 | 2.1 | 4.2 | 0.5 | 1.6 | 9.3 | 5.8 | 1.8 |
| 2008 | 58.3 | 7.4 | 16.7 | 0.0 | 5.1 | 0.5 | 3.1 | 4.3 | 1.5 | 0.8 | 9.9 | 6.3 | 2.8 |
| 2009 | 55.8 | 6.0 | 18.6 | 0.6 | 2.8 | 0.6 | 3.1 | 3.8 | 1.8 | 0.6 | 8.1 | 9.2 | 0.8 |
| 2010 | 57.5 | 4.9 | 15.6 | 0.7 | 5.2 | 0.3 | 4.0 | 4.4 | 2.0 | 2.2 | 7.8 | 8.5 | 2.0 |
| 2011 | 48.5 | 4.4 | 14.0 | 0.3 | 3.7 | 0.9 | 4.4 | 3.3 | 0.8 | 1.0 | 6.5 | 7.7 | 1.6 |
| 2012 | 45.2 | 4.5 | 12.0 | 0.8 | 2.2 | 0.5 | 3.5 | 3.7 | 0.7 | 0.3 | 8.1 | 7.9 | 0.9 |
| 2013 | 39.8 | 3.9 | 8.5 | 0.3 | 2.6 | 0.2 | 3.6 | 3.5 | 1.2 | 1.1 | 6.2 | 7.0 | 1.6 |
| 2014 | 51.5 | 6.1 | 11.5 | 0.5 | 2.8 | 0.7 | 3.4 | 4.8 | 1.1 | 1.0 | 9.0 | 9.2 | 1.5 |
| Regression coefficient* | −0.0028 | −0.573 | −2.00 | 0.0079 | −0.118 | 0.037 | 0.188 | 0.038 | −0.068 | −0.055 | −0.208 | 0.018 | −0.103 |
| 95% CI | −0.0038 to −0.0019 | −0.835 to −0.310 | −2.41 to −1.60 | −0.067 to 0.083 | −0.387 to 0.151 | −0.022 to 0.096 | 0.045–0.331 | −0.122 to 0.199 | −0.178 to 0.043 | −0.191 to 0.082 | −0.441 to 0.025 | −0.250 to 0.286 | −0.271 to 0.066 |
| p | < 0.001 | < 0.001 | < 0.001 | 0.817 | 0.347 | 0.189 | 0.016 | 0.603 | 0.198 | 0.389 | 0.075 | 0.879 | 0.201 |
↵* Linear regression analysis was used to analyze trends in the performance of each procedure. THA: total hip arthroplasty; TKA: total knee arthroplasty; TSA: total shoulder arthroplasty; TEA: total elbow arthroplasty; TAA: total ankle arthroplasty.