Table 2.
Associations between Patient-level and Provider-level variables – Total Knee Arthroplasty
| REGION | SETTING | TEACHING | BED SIZE | SURGEON VOLUME |
HOSPITAL VOLUME |
HOSPITAL OWNERSHIP |
|
|---|---|---|---|---|---|---|---|
|
Age:
Mean (SD) |
NE: 67.9 (10.6) MW: 67.5 (10.7) S: 66.9 (10.6) W: 67.8 (10.6) p < 0.0001 |
Urban: 67.3 (10.7) Rural: 67.6 (10.5) p < 0.0001 |
Non-teaching: 67.8 (10.5) Teaching: 66.9 (10.7) p < 0.0001 |
Small: 67.5 (10.5) Medium: 66.9 (10.8) Large: 67.5 (10.6) p < 0.0001 |
1-17: 67.2 (10.7) 18-35: 67.2 (10.7) 36-66: 67.7 (10.4) ≥ 67: 67.9 (10.5) Missing: 67.2 (10.7) p < 0.0001 |
1-100: 67.6 (10.7) 101-197: 67.5 (10.7) 198-293: 67.2 (10.6) ≥ 294: 67.1 (10.5) p < 0.0001 |
Government: 67.4 (10.9) Non-profit: 67.7 (10.6) For-profit: 67.5 (10.3) p = 0.2005 |
|
Gender
(% female) |
NE: 65.37% MW: 64.76% S: 65.12% W: 62.52% p < 0.0001 |
Urban: 64.51% Rural: 65.09% p = 0.2740 |
Non-teaching: 64.14% Teaching: 65.18% p = 0.0053 |
Small: 65.02% Medium: 64.56% Large: 64.50% p = 0.6190 |
1-17: 64.99% 18-35: 65.33% 36-66: 64.05% ≥ 67: 63.50% Missing: 64.65% p = 0.0183 |
1-100: 66.31% 101-197: 64.30% 198-293: 64.01% ≥ 294: 63.65% p < 0.0001 |
Government: 65.95% Non-profit: 63.95% For-profit: 63.54% p = 0.0385 |
|
Race
(% Black) |
NE: 5.74% MW: 5.68% S: 12.06% W: 5.00% p <0.0001 |
Urban: 8.78% Rural: 4.66% p < 0.0001 |
Non-teaching: 5.60% Teaching: 12.20% p < 0.0001 |
Small: 6.20% Medium: 9.91% Large: 7.99% p < 0.0001 |
1-17: 10.32% 18-35: 9.22% 36-66: 8.35% ≥ 67: 6.09% Missing: 5.62% p < 0.0001 |
1-100: 6.79% 101-197: 9.03% 198-293: 7.28% ≥ 294: 7.24% p < 0.0001 |
Government: 10.29% Non-profit: 6.39% For-profit: 7.47% p <0.0001 |
|
Charlson
Score: mean (SD) |
NE: 0.33 (0.64) MW: 0.46 (0.73) S: 0.47 (0.73) W: 0.40 (0.70) p < 0.0001 |
Urban: 0.43 (0.71) Rural: 0.41 (0.71) p = 0.3389 |
Non-teaching: 0.42 (0.71) Teaching: 0.43 (0.72) p = 0.0054 |
Small: 0.38 (0.61) Medium: 0.41 (0.63) Large: 0.42 (0.63) p < 0.0001 |
1-17: 0.42 (0.64) 18-35: 0.40 (0.62) 36-66: 0.41 (0.63) ≥ 67: 0.39 (0.62) Missing: 0.41 (0.63) p = 0.0058 |
1-100: 0.41 (0.63) 101-197: 0.40 (0.62) 198-293: 0.41 (0.63) ≥ 294: 0.41 (0.63) p = 0.7777 |
Government: 0.45 (0.71) Non-profit: 0.46 (0.73) For-profit: 0.42 (0.70) p = 0.0098 |
|
Income
(% <$35,000) |
NE: 17.12% MW: 19.00% S: 33.42% W: 15.28% p <0.0001 |
Urban: 18.30% Rural: 44.33% p < 0.0001 |
Non-teaching: 25.37% Teaching: 17.68% p < 0.0001 |
Small: 20.00% Medium: 21.16% Large: 22.80% p < 0.0001 |
1-17: 10.32% 18-35: 9.22% 36-66: 8.35% ≥ 67: 6.09% Missing: 5.62% p < 0.0001 |
1-100: 7.24% 101-197: 7.28% 198-293: 9.03% ≥ 294: 6.79% p < 0.0001 |
Government: 29.85% Non-profit: 28.16% For-profit: 26.99% p = 0.0055 |
|
Insurance
Status (% Medicaid or dual) |
NE: 6.33% MW: 3.84% S: 5.70% W: 3.17% p < 0.001 |
Urban: 4.38% Rural: 7.67% p < 0.0001 |
Non-teaching: 4.84% Teaching: 4.87% p = 0.8371 |
Small: 6.12% Medium: 4.63% Large: 4.64% p < 0.0001 |
1-17: 9.20% 18-35: 9.76% 36-66: 9.39% ≥ 67: 7.52% Missing: 6.19% p < 0.0001 |
1-100: 7.61% 101-197:7.79% 198-293: 8.89% ≥ 294: 7.29% p < 0.0001 |
Government: 6.91% Non-profit: 4.16% For-profit: 6.12% p < 0.0001 |