The National Institutes of Health of US announced discontinuation of the large scale prospective clinical study of hormone replacement therapy (HRT) in postmenopausal women in Women's Health Initiative (WHI) Hormone Program after interim data collection in July 2002. Since this announcement was also informed to Japan, it seemed necessary to survey the recognition of and attitude toward this hormone replacement therapy among physicians who can actually perform the therapy and middle or advanced age women who can be the subject, and to obtain information for considering the direction of the menopausal medical treatment in the future.
We examined the influence of this announcement and the way of grasping or recognition of the hormone replacement therapy by questionnairing to gynecologists and middle or older women living in the Kinki district. The subjects were 1,800 gynecologists who were engaged in medical services in Kinki district, and 6,500 women of middle or older age including patients receiving treatment at the concerned medical institutions. The results of questionnairing to women were analyzed. The recovery rate was 19.8% (1,284 answers: HRT current users, 46.0%; past users, 7.8%; non-users, 46.3%). Of HRT current users, 48.6% had an opinion to recommend HRT, but this rate decreased to 38.8% after the WHI announcement (P=0.033). However, only 4.6% answered that they will quit HRT by themselves. In HRT non-users, 20.5% recommended HRT, and 18.0% after the announcement, showing little change in the rate. Among HRT non-users, 37.7% wanted to have HRT before the announcement. It was shown that HRT was understood as a treatment of menopausal disorders at the highest rate (31.8%) among HRT non-users, but was also understood as a treatment of osteoporosis (17.5%) and a treatment for prevention of dementia (16.8%). The rate of persons who desire to have hormone replacement therapy with a regimen other than that used in this discontinued WHI clinical study as a substitution of current HRT in current users (32.2%) was significantly higher than that in past users (10.0%, P=0.00033) and non-users (14.1%, P<0.0001). The opinion that some expectant treatment is sufficient in current users (11.9%) was significantly lower than that in past users (23.0%, P=0.0057) and non-users (16.2%, P<0.030).
In conclusion, middle-aged or older Japanese women have a correct understanding about the hormone replacement therapy, and the latent demand for HRT is relatively high. Calm reception of the WHI announcement without getting panicked and the will to continue HRT even by changing the regimen in consultation with doctors were found in many HRT current users. These results require re-consideration and newly assessment of the hormone replacement therapy, and we should take prudent and active attitude toward treatment of estrogen deficiency in the menopausal medicine in the future. [Adv Obstet Gynecol, 55(1) : 18-30, 2003(H.15.2)]
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