Table 3 Subgroup analysis for the trends of the numbers of patients undergoing cementless total knee arthroplasty
From: Trend of using cementless total knee arthroplasty: a nationwide analysis from 2015 to 2021
Year | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | CAGR | P value |
|---|---|---|---|---|---|---|---|---|---|
Total Number | 1,025 | 3,772 | 4,562 | 5,477 | 7,049 | 4,956 | 1,276 | - | - |
Total Percentage | 3% | 3% | 4% | 5% | 7% | 9% | 9% |  + 20% | 0.003 |
Age (Years) | - | - | - | - | - | - | - | - | - |
 < 50 | 5% | 6% | 7% | 9% | 11% | 13% | 17% |  + 22% | 0.004 |
 50–59 | 4% | 4% | 6% | 7% | 9% | 12% | 13% |  + 22% | 0.004 |
 60–69 | 3% | 3% | 4% | 6% | 8% | 10% | 11% |  + 25% | 0.006 |
 70–74 | 3% | 3% | 3% | 5% | 6% | 8% | 10% |  + 24% | 0.005 |
 75 +  | 3% | 2% | 3% | 4% | 5% | 7% | 7% |  + 16% | 0.006 |
Sex | - | - | - | - | - | - | - | - | - |
 Women | 3% | 3% | 4% | 5% | 6% | 8% | 9% |  + 20% | 0.005 |
 Men | 3% | 4% | 5% | 6% | 8% | 11% | 12% |  + 23% | 0.005 |
CCI | - | - | - | - | - | - | - | - | - |
 0 | 3% | 3% | 4% | 6% | 7% | 6% | 10% |  + 19% | 0.004 |
 1 | 3% | 3% | 4% | 6% | 8% | 10% | 10% |  + 22% | 0.005 |
 2 | 3% | 3% | 4% | 5% | 7% | 9% | 11% |  + 25% | 0.007 |
 3 +  | 3% | 3% | 4% | 5% | 7% | 9% | 10% |  + 19% | 0.004 |
Osteoporosis | 3% | 3% | 3% | 4% | 6% | 7% | 7% |  + 17% | 0.004 |
Osteoporosis treatment | 3% | 3% | 3% | 4% | 5% | 7% | 7% |  + 13% | 0.002 |
Prior Fragility Fracture | 8% | 7% | 8% | 11% | 14% | 16% | 18% |  + 13% | 0.003 |
Diabetes Mellitus | 3% | 3% | 4% | 6% | 7% | 9% | 10% |  + 19% | 0.004 |
Tobacco Use | 3% | 3% | 5% | 6% | 8% | 9% | 14% |  + 26% | 0.009 |
Underweight (BMI < 18.5) | 2% | 3% | 5% | 5% | 7% | 8% | 9% |  + 27% | 0.004 |
Rheumatoid Arthritis | 3% | 3% | 4% | 5% | 7% | 8% | 10% |  + 19% | 0.004 |
Dementia | 3% | 2% | 3% | 5% | 5% | 7% | 6% |  + 11% | 0.004 |
Chronic Kidney Disease | 4% | 3% | 3% | 4% | 5% | 6% | 6% |  + 9% | 0.001 |
Insurance | - | - | - | - | - | - | - | - | - |
Cash | 5% | 8% | 10% | 13% | 14% | 17% | 24% |  + 27% | 0.004 |
Commercial | 3% | 4% | 5% | 6% | 8% | 10% | 10% |  + 21% | 0.004 |
Government | 4% | 4% | 5% | 5% | 10% | 11% | 14% |  + 22% | 0.008 |
Medicaid | 4% | 4% | 5% | 7% | 8% | 13% | 13% |  + 19% | 0.007 |
Medicare | 3% | 3% | 3% | 5% | 6% | 8% | 9% |  + 23% | 0.007 |
Region | - | - | - | - | - | - | - | - | - |
Midwest | 3% | 3% | 4% | 5% | 6% | 7% | 9% |  + 20% | 0.004 |
Northeast | 4% | 4% | 5% | 6% | 8% | 13% | 14% |  + 22% | 0.009 |
South | 3% | 3% | 5% | 6% | 8% | 9% | 9% |  + 19% | 0.004 |
West | 3% | 3% | 3% | 4% | 6% | 8% | 9% |  + 23% | 0.004 |