Mortality and survival

The following parameter determine mortality and survival characteristics of the disease being modeled and the population in general (non-disease mortality).

Note

Parameters are case-sensitive. For Boolean parameters, set to 1 for true or 0 for false. Minimum, maximum, or default values of “NA” indicate that those values are not applicable for that parameter.

EMOD does not use true defaults; that is, if the dependency relationships indicate that a parameter is required, you must supply a value for it. However, many of the tools used to work with EMOD will use the default values provided below.

JSON format does not permit comments, but you can add “dummy” parameters to add contextual information to your files. Any keys that are not EMOD parameter names will be ignored by the model.

Parameter

Data type

Minimum

Maximum

Default

Description

Example

Base_Mortality

float

0

1000

0.001

The base mortality of the infection before accounting for individual immune modification factors. Depending on the setting of Mortality_Time_Course, this is either the daily probability of the disease being fatal (DAILY_MORTALITY) or the probability of death at the end of the infection duration (MORTALITY_AFTER_INFECTIOUS). Enable_Disease_Mortality must be set to 1 (true).

 
{
    "Enable_Vital_Dynamics": 1,
    "Mortality_Time_Course": "DAILY_MORTALITY",
    "Base_Mortality": 0.01
}

Death_Rate_Dependence

enum

NA

NA

NOT_INITIALIZED

Determines how likely individuals are to die from natural, non-disease causes. Enable_Natural_Mortality must be set to 1. Possible values are:

NOT_INITIALIZED

The daily mortality rate is 0, and no one dies from non-disease related causes.

NONDISEASE_MORTALITY_BY_AGE_AND_GENDER

The individual’s age and gender are taken into account to determine the daily mortality rate.

NONDISEASE_MORTALITY_BY_YEAR_AND_AGE_FOR_EACH_GENDER

Gender, age, and year, are all taken into account to determine the daily mortality rate.

Properties, rates, and bin sizes can be set for non-disease mortality for each gender in the demographics file (see Complex distributions parameters).

 
{
    "Death_Rate_Dependence": "NONDISEASE_MORTALITY_BY_AGE_AND_GENDER"
}

Enable_Disease_Mortality

boolean

0

1

1

Controls whether or not individuals are removed from the simulation due to disease deaths.

 
{
    "Enable_Disease_Mortality": 1
}

Enable_Natural_Mortality

boolean

0

1

0

Controls whether or not individuals are removed from the simulation due to natural (non-disease) deaths. Enable_Vital_Dynamics must be set to 1 (true). Use Death_Rate_Dependence to set the natural death rate.

 
{
    "Enable_Natural_Mortality": 1,
    "Enable_Vital_Dynamics": 1
}

Mortality_Blocking_Immunity_Decay_Rate

float

0

1

0.001

The rate at which mortality-blocking immunity decays after the mortality-blocking immunity offset period. Enable_Immune_Decay must be set to 1.

 
{
    "Mortality_Blocking_Immunity_Decay_Rate": 0.1
}

Mortality_Time_Course

enum

NA

NA

DAILY_MORTALITY

The method used to calculate disease deaths. Enable_Disease_Mortality must be set to 1.

Possible values are:

DAILY_MORTALITY

Calculated at every time step.

MORTALITY_AFTER_INFECTIOUS

Calculated once at the end of the disease duration.

 
{
    "Mortality_Time_Course": "MORTALITY_AFTER_INFECTIOUS"
}

x_Other_Mortality

float

0

3.40E+38

1

Scale factor for mortality from causes other than the disease being simulated. Base mortality is provided by the demographics file (see Complex distributions parameters). Enable_Natural_Mortality must be set to 1.

 
{
    "x_Other_Mortality": 1
}