Match merge data for survival analysis                          [ssa6: STB-22]
--------------------------------------

	^tmerge^ ident_var filenameA^(^time_varA^)^ filenameB^(^time_varB^)^
			new_filename^(^new_time_var^)^ 


merges two files of data on individuals for use in survival analysis with time-
varying covariates.  Files ^A^ and ^B^ must both contain ^ident_var^, the variable
that identifies individuals. ^time_varA^ and ^time_varB^ must refer to the time at
transition and must be expressed in the same scale.  Moreover, for each indivi-
dual, the time at censoring must be the same in both files.  The output file,
^new_file_name^, will be ordered according to ^new_time_var^. ^tmerge^ creates
a new variable, ^_File^, which indicates the file from which the transition
originated.


Author
------

        Dr. Philippe Bocquier, CERPOD
        bocquier@@orstom.orstom.fr


Also see
--------

 Manual:  [5d] survival
    STB:  ssa6 (STB-22)
On-line:  ^help^ for ^firstocc^, ^slice^, and ^tmerge^