Child Prevalence LDP Import Files

A Child Prevalence LDP Import is composed of two different files - the dictionary file (a file with a .DIC extension), and the data file (a file with a .TXT extension). The structure of these files is identical to those in a normal LDP Import with a few minor exceptions. 

Differences

• There must be two variables in the dictionary which have a Base containing "Age recode" or "Age at diagnosis".
• One of these variables can only have two values in its "[Format=" section. This variable will have a value for All Ages at Diagnosis, and a value for Child age at diagnosis. A common layout for this variable will be like this:

[Format=Age dx (all, <20)]
0=All ages of dx
1=< 20 at dx

• This variable with only two values must be the last variable which defines the cohort. For example, say you have the variables - Sex, Age dx (all, <20), Age at Prevalence Date (Calculated), Crude Percent, Count, and Population. The variables Sex, Age dx, and Age At Prev define the cohort. The variables Crude Percent, Count, and Population provide values for each cohort. The first three variables need to be Sex, Age At Prev, and Age dx, in that order, because Age dx has only two values, and needs to be the last variable that defines the cohort.