Table 6. Multiple linear regression analysis of effect of MPE on inpatient and total medical cost.

	Inpatient cost		Total cost
	Unstandardized Coefficients	p	Unstandardized Coefficients	p
Model 1	−43109.74	0.007	−61289.80	0.003
Model 2	−46226.19	0.005	−60200.11	0.005
Model 3	−44575.46	0.005	−62959.92	0.003
Model 4	−44447.13	0.001	−54490.22	0.013
Model 5	−33826.85	0.029	−52241.43	0.011

Both of the two dependent variables in these models were the log transformation of inpatient costs and total costs.

Model 1: crude.

Model 2: adjusted for age and gender.

Model 3: adjusted for diabetes status and number of comorbidities.

Model 4: adjusted for eGFR, hemoglobin and serum albumin levels at initation of hemodialysis.

Model 5: adjusted for insertion of double-lumen catheter at initiation of hemodialysis.