Define descriptive epidemiology. Describe uses strengths, and limitations of selected descriptive study designs such as ecologic study, case report, case series, and cross sectional survey. Define ration, proportion, and rate. Distinguish between crude and be able to calculate age adjusted rates using either the direct or the indirect method. Define standardized morbidity (or mortality) ration.
This 'cheat sheet' is a handy reference, meant for beginning Perl programmers. Not everything is mentioned, but 194 features may already be overwhelming.http://search.cpan.org/~nwclark/perl-5.8.7/pod/perlcheat.pod