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Table 1 Model Inputs and sources

From: Cost-utility analysis of Palbociclib + letrozole and ribociclib + letrozole versus Letrozole monotherapy in the first-line treatment of metastatic breast cancer in Iran using partitioned survival model

Statistic variable

Base case

SD/(CI)

Distribution

Source

Annual discount rate

0.05

(0.03–0.12)

Beta

 

Time Horizon(years)

15

(5–25)

  

Efficacy Parameters(PFS)

HR

   

Palbociclib + Letrozole vs. Letrozole

0.49

(0.32–0.75)

LogNormal

(12)

Ribociclib + Letrozole vs. Letrozole

0.57

(0.46–0.7)

LogNormal

(29)

Efficacy Parameters(OS)

HR

   

Palbociclib + Letrozole vs. Letrozole

0.897

(0.623–1.294)

LogNormal

(12)

Ribociclib + Letrozole vs. Letrozole

0.75

(0.52–1.08)

LogNormal

(29)

Adverse Events Costs(T)

Palbociclib + Letrozole

21.225

± 4.245

Gamma

(33),

Letrozole

0.775

± 0.154

Gamma

(33), Survey and Calibration

Ribociclib + Letrozole

23.194

± 4.638

Gamma

(33), Survey and Calibration

Management and Monitoring Costs(T)

GP Visits

2.344

  

Survey and Calibration

Oncologist Visit

2.841

  

Survey and Calibration

 Computed Tomography

9.136

  

Survey and Calibration

 Bone scintigraphy

22.540

  

Survey and Calibration

 hospitalizations

18.375

  

Survey and Calibration

 Laboratory Tests

3.064

  

Survey and Calibration

Monthly Medications Costs(T)

 Palbociclib (Foreign Brand 1)

3189.911

± 637.982

Gamma

Survey

 Palbociclib (Foreign Brand 2)

2188.427

± 437.685

Gamma

Survey

 Palbociclib (Iranian Brand)

342.73

± 68.545

Gamma

FDA

 Letrozole (Iranian Brand)

2.687

± 0.537

Gamma

FDA

 Letrozole (Foreign Brand)

8.011

± 1.602

Gamma

FDA

 Ribociclib

3938.131

± 791.543

Gamma

Survey

Utilities

 PF

0.83205

± 0.00655

Beta

(21)

 PD

0.505

± 0.0505

Beta

(21)