Research Article

Development of an Empirically Calibrated Model of Esophageal Squamous Cell Carcinoma in High-Risk Regions

Table 1

Model input parameters.

ParameterExpected value (SD)Source

Progression
 Normal → BCH/mDβ0 = -8.96 (0.461)Derived from calibration
β1 = 0.20481 (0.01815)
β2 = 0.00002 (0)
β3 = 0.00836 (0.00134)
 BCH/mD → MDα0 = -3.359 (0.171)Derived from calibration
α1 = 0.03668 (0.0095)
 MD → SD15.38%Derived from calibration
 SD → Undetected ESCC (TNM I)20.94%[9]
 Undetected ESCC (TNM I) → Undetected ESCC (TNM II)15.38%Derived from calibration
 Undetected ESCC (TNM II) → Undetected ESCC (TNM III)20.94%Derived from calibration
 Undetected ESCC (TNM III) → Undetected ESCC (TNM IV)46.65%Derived from calibration
Detection rate
 Undetected ESCC (TNM I) → Detected ESCC (TNM I)54.87%Derived from calibration
 Undetected ESCC (TNM II) → Detected ESCC (TNM II)32.31%Derived from calibration
 Undetected ESCC (TNM III) → Detected ESCC (TNM III)3.86%Derived from calibration
 Undetected ESCC (TNM IV) → Detected ESCC (TNM IV)34.32%Derived from calibration
Mortality
 All-cause mortalityChinese life-table[10]
 Disease-specific mortality (TNM I)Chinese life-table[10]
 Disease-specific mortality (TNM II)15.15%[11, 12]
 Disease-specific mortality (TNM III)35.97%[11, 12]
 Disease-specific mortality (TNM IV)56.47%[11, 12]

It was assumed to be equivalent with normal population after complete resection.
ESCC, esophageal squamous cell carcinoma; BCH, basal cell hyperplasia; mD, mild dysplasia; MD, moderate dysplasia; SD, severe dysplasia.