layout.fixed.naaccr.doc.naaccr16.survMonthsPresumedAlive.html Maven / Gradle / Ivy

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Framework that allows defining file formats (layouts) and use them to read and write data files.

There is a newer version: 5.5


    
        Alternate Name
        Item #
        Length
        Source of Standard
        Implemented Year
        Implemented Version
        Retired Year
        Retired Version
        Column #
    
    
        
        1787
        4
        NAACCR
        2015
        15
        
        
        2314 - 2317
    


Description

     Because not all central cancer registries conduct active patient follow-up, it is necessary to have an option for calculating survival times based on the assumption that the registry has ascertained all available deaths (state/province and national), and persons not known to be deceased are presumed to be alive as of the last date for which complete death ascertainment is available. The survival interval in months is calculated using the month, day, and year of the Surv-Date DX Recode [1788] and the month, day, and year of the Surv-Date Presumed Alive [1785]. The survival program is available from your standard setter or NAACCR.
     
    Example of a case diagnosed in 2011 and submitted in 2013. 
Date of submission: 20131101 
Date of diagnosis: 20110915 
Date of last contact: 20111017
        
Latest date for complete death ascertainment: 20111231 
Vital status: Alive 
Study cutoff date: 20111231
        
Under the "presumed alive" scenario, 20111231 would be used as the endpoint for the survival calculation. The presumed alive survival time would be 3 months, while the survival time using the date of last contact (assuming active follow-up) would be 1 month. 
    

Rationale
Accurate survival estimates are crucial for monitoring trends in population-based cancer survival and assessing the effectiveness of healthcare delivery to cancer patients. With the aim of obtaining the most precise estimates of survival, it is necessary to use complete dates (month, day, and year components) in the calculation of the survival interval. The survival interval in months is calculated using complete dates, and the algorithm imputes missing components of dates when they are not available in central registry records.
Additional information about the algorithm and what specific values are assigned in given missing date situations are available here:


    http://seer.cancer.gov/survivaltime/.

Codes
A value of 9999 is for missing and matches the Surv-Flag Presumed Alive [1786] value of 9 or blank. Leading zeros will be used when needed to left fill the field.