| Group | Variable | Coef. | Std. Dev | t | P > |t| |
| G1 | area*** | 0.009 | 0.002 | 4.940 | 0.000 |
| room*** | 0.188 | 0.077 | 2.440 | 0.018 | |
| hosp*** | 0.000 | 0.000 | 4.330 | 0.000 | |
| rtype*** | 0.446 | 0.111 | 4.020 | 0.000 | |
| superm*** | −0.000 | 0.000 | −2.270 | 0.027 | |
| _cons*** | 6.430 | 0.151 | 42.540 | 0.000 |