The incidence rates of Clostridium difficile are measured in both hospitals and nursing homes throughout a particular county. Those with low rates of infection were marked as having an effective nosocomial infection prevention strategy, while those with high rates were marked as having an ineffective strategy.
If the Department of Health Services wishes to determine whether hospitals or nursing homes have a more effective nosocomial infection prevention strategy, which of the following would be most appropriate?
- Chi-squared test
- Paired t-test
- One-way analysis of variance
- Pearson correlation
There is no interval data in this study. It is a study of nominal variables, namely care center type (hospital or nursing home) and the effectiveness of their infection prevention plan. The Chi-squared test is the appropriate choice to determine whether nominal variables have a significant relationship with one another.