I am using Nordic Ergonomic questionnaire to assess the musculo-skeletal illnesses of brick industry workers. I wand develop a model from these 9 questions.
You can use proportion difference test if there are two samples from two supposedly different populations or single proportion hypothesis test if you want to compare the results with some particular pattern of proportions.
Can you please add some more information on the question. As you have a binary var then you can look at building a logistic reg model. based on information you shared you should first check the frequency distribution