# Design, Planning and Analysis of Observational Studies

## Documentation for package ‘osDesign’ version 1.8

- DESCRIPTION file.

## Help Pages

beta0 | Calculate the intercept of a logistic regression model, given a vector of log-odds ratio parameters and an overall prevalence.
ccPower | Simulation-based estimation of power for the case-control design
ccSim | Simulation function for case-control study designs.
infants | Infant mortality data from North Carolina
Ohio | Ohio lung cancer data
phaseI | Expected phase I stratification
plotPower | Plot function for power, based on two-phase and case-control design
rmvhyper | Random generation for the multivariate hypergeometric distribution
tps | Estimation for two-phase designs.
tpsPower | Simulation-based estimation of power for the two-phase study design
tpsSim | Simulation function for two-phase study designs.