This study was conducted in a cardiovascular surgery intensive care unit (CVS-ICU) in Turkey that utilized both open and closed endotracheal suction (ES). What were the inclusion criteria for the study?

Let’s look at the use of ANOVA in the following nursing research article:
Özden, D., & Görgülü, R. S. (2015). Effects of open and closed suction systems on the haemodynamic parameters in cardiac surgery patients. Nursing in Critical Care, 20(3), 118–125. doi:10.1111/nicc.12094