| logrra | Coef. | Std. Err. | t | P > t | (95% Conf. Interval) | |
| difcal | .0660771 | .0343893 | 1.92 | 0.113 | −.0223233 | .1544776 |
| _Icatcal_1 | −.1032021 | .5736509 | −0.18 | 0.864 | −1.577819 | 1.371415 |
| _Icatcal_2 | −.511068 | .5948386 | −0.86 | 0.430 | −2.040149 | 1.018013 |
| typepatient | −.5686713 | .502095 | −1.13 | 0.309 | −1.859348 | .7220049 |
| _cons | −.209952 | .6345331 | −0.33 | 0.754 | −1.841071 | 1.421167 |
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