| DESCRIPTION |
The ROR SELECTION RULES file contains definitions
added to the corresponding registry.
Lower level rules are referenced only by other
rules (by rule macros in the expressions). Their
expressions are evaluated in the proper order, and
the result values are used in the expressions of
other rules. Lower level rules have an indirect
impact on the final result and can be used for
complex processing of linked files and multiples.
of the selection rules that are used to screen
For example, a lower level rule can calculate
maximum and minimum values of a parameter in the
sub-file, and a top-level rule will analyze these
values and decide if the patient should be added
to the registry. Moreover, they could be used to
split a very complex rule into several simpler
rules.
Records of the file are uniquely identified by the
rule name (the "A" primary key and the uniqueness
patients for addition to the registries. There are
index "B" are used for this purpose).
two kinds of rules: top-level and lower level.
If a rule is referenced by the ROR REGISTRY
PARAMETERS file, it is the top-level rule.
Non-zero value of any top-level rule expression
directly determines that the patient should be
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