Table 2 Frequencies of women with and without lichen lesions in a case-control study This essentially ... A fundamental consideration in research designs concerns the choice of observational ...

Here’s a quick guide to understanding study design that will help you navigate the often bewildering world of health research. 1) Much of health research can be broken down into two types ...

Now, after 18 months, ProofPilot has launched a Software as a Service to support research by nonprofit organizations. The idea is to help them design and execute studies at a more affordable price ...

Pew Research Center’s international ... was used in some countries. Phone designs are implemented via computer-assisted telephone interviewing (CATI). The results are based on national samples, unless ...