Estimated coefficients and P values from the total-charges linear regression
Variablea | β-Coefficient | Standard Error | P Value |
---|---|---|---|
aThe reference group was male patients <30 yr of age with CKD but neither diabetes mellitus nor hypertension and with Cr levels of <2.0 mg/dl. | |||
Intercept | 3.568 | 0.181 | 0.0001 |
Age of 30 to 39 yr | 1.964 | 0.256 | 0.0001 |
Age of 40 to 49 yr | 2.251 | 0.225 | 0.0001 |
Age of 50 to 59 yr | 2.462 | 0.216 | 0.0001 |
Age of 60 to 64 yr | 2.200 | 0.235 | 0.0001 |
Age of ≥65 yr | 2.633 | 0.191 | 0.0001 |
Female gender | -0.014 | 0.065 | 0.8315 |
Diabetes mellitus only | 0.851 | 0.183 | 0.0001 |
Hypertension only | 0.511 | 0.087 | 0.0001 |
Both diabetes mellitus and hypertension | 0.963 | 0.101 | 0.0001 |
Cr level of 2.0 to 2.9 mg/dl | 0.113 | 0.087 | 0.1951 |
Cr level of 3.0 to 3.9 mg/dl | 0.736 | 0.183 | 0.0001 |
Cr level of ≥4.0 mg/dl | 1.157 | 0.134 | 0.0001 |