To describe the natural history of a condition or disease. To describe the natural history of a condition or disease. To determine effectiveness or cost effectiveness of treatments/services and/or health care products. To measure or monitor safety and harm. To measure quality of care.
According to the NMSS, attacks or flare-ups of symptoms only qualify as exacerbations if: 1  they occur at least 30 days from an earlier flare-up. 2  symptoms last for 24 hours or longer.
In most women who undergo natural menopause, hot flashes subside within 2 to 5 years after the last menstrual period. In a small number of women, however, hot flashes can continue for 8 to 15 years after the last menstrual period.