Final answer:
Maria's method of reviewing past records for massage therapy on fibromyalgia patients is correctly described as a retrospective review of records, which helps in understanding historical patterns and improving care.
Step-by-step explanation:
The approach Maria, a massage therapist, is using to review her past records to determine the number of individuals she has provided massage therapy for fibromyalgia over the past 5 years can indeed be described as a retrospective review of records. This retrospective study design involves looking back at data that have already been collected to investigate historical trends or outcomes related to a specific condition. In Maria's case, she is reviewing her client records to determine the frequency of massage therapy services rendered for fibromyalgia, which could help her understand patterns or identify opportunities for improved client care.