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. There is some evidence that women who go through menopause due to surgery may have more severe hot flashes for more years than women who go through natural menopause.