Table V.
Univariable and multivariable gamma regression results comparing RCR cost to diabetes and other characteristics among RCR patients.
| Variable | Ratio in cost∗ (95% CI) | P value∗ | Ratio in cost† (95% CI) | P value† |
|---|---|---|---|---|
| Diabetes | 1.07 (1.06, 1.08) | <.001 | 1.03 (1.02, 1.04) | <.001 |
| Age (in 10 yrs) | 1.03 (1.03, 1.03) | <.001 | 1.01 (1.01, 1.02) | <.001 |
| Sex: male | 1.02 (1.02, 1.03) | <.001 | 1.03 (1.02, 1.03) | <.001 |
| Region: Northeast vs. North Central | 0.96 (0.95, 0.96) | <.001 | 1.00 (0.99, 1.01) | .91 |
| South vs. North Central | 0.95 (0.94, 0.95) | <.001 | 0.94 (0.93, 0.95) | <.001 |
| West vs. north Central | 1.06 (1.05, 1.07) | <.001 | 1.06 (1.05, 1.07) | <.001 |
| Unknown vs. north Central | 0.82 (0.81, 0.84) | <.001 | 0.83 (0.82, 0.85) | <.001 |
| Insurance plan: EPO vs. comprehensive | 0.97 (0.94, 1.00) | .022 | 0.98 (0.95, 1.00) | .10 |
| HMO vs. comprehensive | 0.94 (0.92, 0.96) | <.001 | 0.97 (0.95, 0.99) | .002 |
| POS vs. comprehensive | 1.08 (1.06, 1.11) | <.001 | 1.12 (1.10, 1.15) | <.001 |
| PPO vs. comprehensive | 1.06 (1.04, 1.08) | <.001 | 1.09 (1.07, 1.11) | <.001 |
| POS with capitation vs. comprehensive | 0.89 (0.85, 0.94) | <.001 | 0.93 (0.89, 0.98) | .002 |
| CDHP vs. comprehensive | 1.08 (1.06, 1.11) | <.001 | 1.09 (1.07, 1.12) | <.001 |
| HDHP vs. comprehensive | 1.08 (1.06, 1.11) | <.001 | 1.07 (1.04, 1.10) | <.001 |
| Tobacco abuse | 1.04 (1.03, 1.05) | <.001 | 1.02 (1.01, 1.03) | <.001 |
| Year of RCR | 1.04 (1.04, 1.04) | <.001 | 1.04 (1.04, 1.04) | <.001 |
| CCI | 1.09 (1.09, 1.10) | <.001 | 1.09 (1.08, 1.09) | <.001 |
CI, confidence interval; CCI, Charlson comorbidity index; RCR, rotator cuff repair; POS, point of service; PPO, preferred provider organization; CDHP, consumer-directed health plan; HDHP, high-deductible health plan.
N = 214,365.
∗
From univariable models.
†
From multivariable model.