comparing the variation in the ordinal variables between osa and nosa what is the difference in quality of life after surgery in a sleep apnea patient? what variables are used in quality of life survey how to compare the quality of life of an individual with osa how are quality of life variables related between groups osa vs nosa apnea how can you find the difference when are the change in the ordinal variable after surgery how does osa affect quality of life how to predict change in quality of life after surgery how do you compare quality of life variables how to compare quality of life after surgery what measures is used to assess quality of life after surgery? quizlet comparing quality of life with osa what is the difference in measures for quality of life how can you predict whether patients are improving their quality of life after surgery? which test compares quality of life with osa? which type of test compares osa with nosa how does the quality of life test compare is quality of life affected by surgery in osa group can you study the effect of osa