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Use and perception of hormone therapy following media reports of the Women's Health Initiative: a survey of Australian WISDOM participants

Objectives To investigate the impact of the Women's Health Initiative (WHI) on the use and perception of hormone therapy (HT) in well-informed and altruistic women who had volunteered for a similar long-term study of HT (Women's International Study of long Duration Oestrogen after Menopause, WISDOM). Methods A total of 840 South Australian WISDOM participants were sent questionnaires asking about their source of information about the WHI, interpretation of the 2002 WHI findings, perception of HT as a risk factor for breast cancer, attitudes towards doctors and the media and intent to use HT in the future. Results Altogether, 618 participants (74%) responded. Written and verbal information provided by WISDOM were rated as the most helpful sources of information about the WHI. Participants were aware of the increase in breast cancer and decrease in fractures seen with combined estrogen/progestogen hormone therapy (EPT) but were less convinced about the other major findings, including cardiovascular disease and dementia. HT was rated as an important risk factor for breast cancer. Participants valued medical research and were more likely to question therapies without evidence. After WHI and WISDOM, most were willing to participate in a subsequent trial and most past HT users resumed therapy. Conclusions There are sufficient recruits for future long-term HT studies if they are given sufficient quality information and individual counselling. Our study also suggests that women who are appropriately informed may choose to take long-term HT despite a more conservative approach advised by some agencies.