OBSTET-L Mensagens pela Janeiro, 2001: trabalhos interessantes III

trabalhos interessantes III

From: Jaime

jaimen@zaz.com.br

Mon, 29 Jan 2001 22:58:06 -0200

>----- Original Message -----

jaimen@zaz.com.br

obstet-l@forum.obgyn.net

> 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 pela Dra 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
>

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