Dependent Variable
The dependent, or response, variable is the variable being tested in the model. You can either provide your dependent variable values in the input data set or you can have Joinpoint calculate them from other variables in the input data set (e.g. a crude rate can be calculated from variables with the count and the population).
Run Type
Calculated From Data File  This option should be selected if you want Joinpoint to calculate your dependent variable. Joinpoint can calculate Crude Rates, AgeAdjusted Rates, Proportions and Percentages. The table below documents which variables are required for each type of dependent variable. Please note that if Joinpoint calculates the dependent variable, it will also compute the associated standard errors. 

Provided In Data File  This option should be selected if you are providing Joinpoint with your dependent variable values. For some analysis types, the standard error is also required. Please reference the table below for more information. 
Delay Adjusted Data  This option is only available if a SEER*Stat dictionary (DIC) file is used for the session that contains delay adjusted statistics. Joinpoint will read in and analyze the delay statistics for each cohort. See Delay Adjusted Statistics for more information. 
Delay & NonDelay Data  This option is only available if a SEER*Stat dictionary (DIC) file is used for the session that contains delay adjusted statistics. Joinpoint will read in and analyze both the delay and nondelay statistics for each cohort. See Delay Adjusted Statistics for more information. 
Types of Dependent Variables Accepted by Joinpoint:
The following dependent variable types can be analyzed by Joinpoint:
Count  A count is typically a number of “events” (i.e. cancer cases or deaths. Joinpoint will accept counts in fractional form (e.g. 410.375). 

Crude Rate 
A crude rate is the number of cases (or deaths) occurring in a specified population, usually expressed as the number of cases per 100,000 population at risk. Joinpoint will accept counts and populations in fractional form (e.g., 410.375). 
AgeAdjusted Rate  An ageadjusted rate is a weighted average of crude rates, where the crude rates are calculated for different age groups and the weights are the proportions of persons in the corresponding age groups of a standard population. The ageadjusted rate for an age group comprised of the ages x through y is calculated using the following formula.
Where count is the number of cases in the ith age group, pop_{i} is the relevant population for the same age group, and stdpop_{i} is the standard population for the same age group. If count_{i} and pop_{i} are both zero, Joinpoint treats that rate as zero. Joinpoint will not allow the unusual event where popi is zero but count_{i} is nonzero. If count_{i} is greater than zero and pop_{i} is zero, Joinpoint will set pop_{i} to be equal to count_{i} in order to compute the interim crude rate. Joinpoint will accept counts, populations and standard populations in fractional form (e.g., 410.375). For a detailed explanation on how to compute ageadjusted rates, see How to Compute AgeAdjusted Rates. 
Proportion 
A proportion is a ratio of a numerator to a denominator where the result is between 0 and 1. Joinpoint will not analyze cohorts that have proportions greater than 1 when such proportions are calculated. Jointpoint will accept numerators and denominators in fractional form (e.g., 410.375). 
Percent 
A percent is a fraction or ratio with 100 understood as the denominator. Joinpoint will not allow percentage values greater than 100 when such percentages are calculated. Jointpoint will accept numerators and denominators in fractional form (e.g., 410.375). 
Other  Select this category for all other types of numeric variables that do not fall into one of the previous categories (i.e. temperatures over time). 
Standard Error Calculations:
When Joinpoint computes the Dependent Variable, the following formulas will be used to compute the associated standard errors.
Standard Error for Crude Rate
This calculation assumes that the counts have Poisson distributions.
Standard Error for an AgeAdjusted Rate
This calculation assumes that the counts have Poisson distributions. Suppose that the ageadjusted rate is for an age group comprised of ages x through y.
Standard Error for Proportions and Percentages
For consistency, assume that percents are transformed to proportions before analysis.
Where p_{i }is the proportion and n_{i} is the sample size of the ith observation.
Edits performed on the Dependent Variable:

When a session is executed, Joinpoint will first edit the input data file. For a list and description of all data errors and warnings produced by Joinpoint, please see the "Job Execution  Errors and Warnings" help section.
Variables:
One or more of the following variables will need to be specified in the input data file depending on the Calculated/Provided, Type, and Heteroscedastic Errors Options selections:
 Count Variable
 Population Variable
 AgeAdjusted Rate
 Standard Error
 Adjustment Variable
 Standard Population
 Numerator Variable – this variable replaces the “Count” variable when appropriate
 Denominator Variable – this variable replaces the “Population” variable when appropriate
Joinpoint does allow any variable value to be provided in fractional form (e.g. 410.375).
Calculate  Type  Heteroscedastic Errors  Required Variables  Required Variables  Required Variables  Required Variables 

No  Count  Constant Variance  Count  
No  Count  Standard Error  Count  Standard Error  
No  Count  Poisson Variance  Count  
No  Crude Rates  Constant Variance  Rate  
No  Crude Rates  Standard Error  Rate  Standard Error  
Crude Rates  Poisson Variance  n/a  
No  AgeAdjusted Rates  Constant Variance  Rate  
No  AgeAdjusted Rates  Standard Error  Rate  Standard Error  
No  AgeAdjusted Rates  Poisson Variance  n/a  
No  Proportion  Constant Variance  Proportion  
No  Proportion  Standard Error  Proportion  Standard Error  
No  Proportion  Poisson Variance  n/a  
No  Percent  Constant Variance  Percent  
No  Percent  Standard Error  Percent  Standard Error  
No  Percent  Poisson Variance  n/a  
No  Other  Constant Variance  Other  
No  Other  Standard Error  Other  Standard Error  
No  Other  Poisson Variance  n/a  
Yes  Count  Constant Variance  n/a  
Yes  Count  Standard Error  n/a  
Yes  Count  Poisson Variance  n/a  
Yes  Crude Rates  Constant Variance  Count  Population  
Yes  Crude Rates  Standard Error  Count  Population  
Yes  Crude Rates  Poisson Variance  Count  Population  
Yes  AgeAdjusted Rates  Constant Variance  Count  Population  Age Group  Standard Pop 
Yes  AgeAdjusted Rates  Standard Error  Count  Population  Age Group  Standard Pop 
Yes  AgeAdjusted Rates  Poisson Variance  n/a  
Yes  Proportion  Constant Variance  Count  Population  
Yes  Proportion  Standard Error  Count  Population  
Yes  Proportion  Poisson Variance  n/a  
Yes  Percent  Constant Variance  Count  Population  
Yes  Percent  Standard Error  Count  Population  
Yes  Percent  Poisson Variance  n/a  
Yes  Other  Constant Variance  n/a  
Yes  Other  Standard Error  n/a  
Yes  Other  Poisson Variance  n/a 