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trabalhos interessantes IIIFrom: Jaime (jaimen@zaz.com.br)Mon, 29 Jan 2001 22:35:51 -0200
Aos colegas da lista Mulheres que pintam cabelos têm risco maior de desenvolver câncer de bexiga. Um estudo que será publicado em Fevereiro próximo pelo "International Journal of Cancer", demonstra uma intrigante relação entre as usuárias de tinturas de cabelos e o câncer de bexiga. O Estudo dirigido pelo Dr Gago Dominguez (Califórnia), chega a concluir que mulheres que usam por um período de 15 anos, têm 3 vezes mais risco de desenvolver o câncer de bexiga do que as não usuárias. Mais detalhes: NEW YORK (Reuters Health) Jan 25 - Women who hide their natural hair color with regular applications of permanent hair dye may be putting themselves at increased risk for bladder cancer, new research findings suggest. "Our study is the first to demonstrate a frequency- and duration-dependent association between personal use of permanent hair-dyes and bladder cancer risk," lead study author Dr. Manuela Gago-Dominguez, from the Keck School of Medicine at the University of Southern California, told Reuters Health. To investigate the relationship between permanent hair dyes and bladder cancer, Dr. Gago-Dominguez and colleagues analyzed more than 1500 cases of bladder cancer, 897 of which yielded information about hair dye use. Data on a similar number of adults who did not use permanent hair dye were used for comparison. The study findings will be published in the February issue of the International Journal of Cancer. After adjusting for cigarette smoking, the authors found that women who used permanent hair dye at least once a month were 2 times more likely to develop bladder cancer than women who did not use permanent hair dye. Women who reported regular long-term use of the hair dye for at least 15 years were more than 3 times more likely to develop bladder cancer than nonusers. Hairstylists and barbers were 50% more likely to have bladder cancer than those who did not have occupational exposure to hair dye. Those who were exposed to hair dye for at least 10 years were five times more likely than the comparison group of unexposed individuals to develop bladder cancer. "Our novel observations are provocative and carry enormous public health implications," Dr. Gago-Dominguez said. "It is [perhaps] a little premature to make any recommendation about stopping the use of permanent hair dyes," she acknowledged. "However, this is one of the largest and most comprehensive studies ever conducted on the issue and we think our results should not be ignored." But according to Dr. John Corbett, a consultant to the Cosmetic, Toiletry, and Fragrance Association, Dr. Gago-Dominguez and her team may have used a faulty study design. "Their measure of exposure is just frequency of use and duration of use, which is not very good," he told Reuters Health. "The most important factor in exposure to hair dye is the shade you use." "All of the shades use essentially the same chemicals, but there's quite a lot more of [the chemicals] in dark brown and black than there are in blonde," he explained. Also, Dr. Corbett contends that the researchers "seem to make light of previous studies" by the National Cancer Institute and the American Cancer Society that failed to find an association between hair dye use and cancer risk. "The bottom line is I don't think [the new study findings] should affect people in their decision as to whether to use hair color or affect the hair color industry," Dr. Corbett said.
-- Jaime Nonato http://www.jaimenonato.com jaimen@zaz.com.br
Voltar para Administrador da lista: flavio.monteiro.desouza@obgyn.net Solicitações à lista: obstet-l-request@obgyn.net Última atualização: Mon May 19 16:34:04 2008 |
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