I have a question concerning regression analysis with a dependent proportional variable.
In our study we have an outcome variable called Study-quality.
Study-quality is determined by looking at 11 criteria which are present or absent. When a criterium is met, a study can gain +1 point. So a study can gain a total score between 0 and 11. higher amount of points = better studyquality.
Some criteria are not applicable for certain studies, when this is the case, the total amount of points that can be gained is 9 or 10.
To make a fair comparision, we counted the total gained points per study and devided them by the total points one study could gain. (so for example 7/10 or 4/11).
this proportion is our outcome variable Studyquality.
leading to my question: we have collected several variables (year, sample size, funding source, study setting, etc.) we think are associated with Studyquality.
e.g. the more recent the study is published, the more likely studyquality would be higher
What type of regression analysis could be best used to test possible associations with a proportional outcome var? (wihtin STATA software?)