What is the dependent and Independent variable

Please what is the dependent and independent variable in this statement? In residents 65 years and above, who are bed-bound at Pro Medical Skilled Nursing and Rehabilitation Center, Arlington, how does the application of natural cleansers and nutrient emollients as a preventative measure using foam dressings and scheduling a 2-hour turning time, compared to the application of lotion and aloe vesta without dressing and scheduling 2-hour turning time impact pressure ulcer development within a three-month period.