Document EvqqNnaOJg0pmpzj0BwQyL7vV
FILE NAME Talc TALC
DATE 2016
DOC TALC132
DOCUMENT DESCRIPTION NHS Report - Talc and Ovarian Cancer-
What the Most Recent Evidence Shows
Talc ovarian cancer what the most recent evidence shows - Healt
http://www.nhs.uk/news/2016/03ovarian
choices Your health your choices Talc and ovarian cancer what the most recent evidence shows
Behind the Headlines
Tuesday March 8 2016
Talc can get into the upper genital tract
Talc is linked to ovarian cancer the Mail Online reports That is the finding of a recent study looking at whether talcum powder can increase the risk of
cancer- cancer- an association made newsworthy by a profile court case in the US
ovarian
rRiesskeoafrocvhaerrisanstcuadniceedrmwoir the gtehnainta2l ,t0a0lc0 u ws oe men with ovarian cancer and a similar control group who were free of disease Overall they found a 33 increase in the
When subdividing the groups by frequency of talc use and use of hormone replacement therapy the link strengthened
However caution must be taken in interpreting these risk estimates as they are based on much smaller sample sizes and may be unreliable By design the study is not able to prove cause and effect It appears people were asked about talc use after their cancer diagnosis which may introduce recall bias It also can't determine whether the use of talc or ovarian cancer occurred first Various unmeasured health and lifestyle factors may also be involved in any link
The International Agency for Research on Cancer has classified genital talc as a possible causing agent carcinogen
To date there have been mixed findings from research in the area Further research in the form of quality prospective studies would be required to confirm this Most gynaecologists recommend using plain unperfumed soaps to wash the area around the vagina the vulva gently every day as opposed to talc or perfumed soaps gels and antiseptics
Read more about vagina health
Where did the story come from
The study was carried out by researchers from Brigham and Women's Hospital in the US and was funded by the US National Institutes of Health the Department of Defense Congressionally Directed Medical Research Programs and the Department of Obstetrics and Gynecology
It was published in the reviewed journal Epidemiology on an open access basis so it is free to read online
powder The study is actually from 2015 but has hit the headlines now because of a profile court case in the US where talc manufacturer Johnson and Johnson
ordered to pay 72m to the family of a woman who died from ovarian cancer The family alleged her ovarian cancer was caused by her use of talcum There are reports the company is planning to appeal against the decision and it maintains there is no evidence to support the allegation
has
been
The Mail Online's reporting of the study was accurate and outlined the inherent limitations of the research
What kind of research was this
This contstr udyo aiml ed to investigate the association between talc use and ovarian cancer comparing women diagnosed with cancer with healthy controls
There are said to have been a number of studies that have investigated this link before but none were able to prove a link This study is still only able to find a link and cannot provide conclusive findings
It seems to have questioned women about their talc use after they were diagnosed with cancer which may have introduced recall bias - women with ovarian cancer may be more likely to remember using talc Other unmeasured health and lifestyle factors confounders may also be influencing the link
What did the research involve
This study used participants involved in the Nurses Health Study an ongoing cohort study
Data was collected in three phases
1992-97 1998-2002 2003-08
This study combines the data from all three phases
Cases diagnosed with ovarian cancer were identified through tumour boards - the US version of NHS multidisciplinary teams - and medical records
Controls were identified though random digit dialling driver licence lists and town resident lists of residence
Matching of cases and controls was by year age groups and region
Interviews were conducted to identify potential ovarian risk factors that occurred more than one year before diagnosis for cases Controls were also interviewed Participants were asked whether they used talcum powder on the genital or rectal area sanitary products underwear or other areas regularly or at least monthly Information was also gathered on the type of powder used when they started using talc years used and the number of times talc is applied each month Lifetime
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Talc ovarian cancer what the most recent evidence shows - Healt
//www.nhs.uk/news/2016/03March/Pages/Talc-and-ovarian-cance
exposure was calculated Partners talc use and condom and diaphragm use was also recorded rFeacmiolrydehdistory of ovarian or premenopausal breast cancer use of hormone replacement therapy and dietary intake from a food frequency questionnaire were also
Statistical analyses were performed to draw associations and adjust for confounding variables What were the basic results
odds ratio OR The use of genital talc was associated with a 33 increased risk of ovarian cancer
age study centre and phase
1.33 95 confidence interval CI 1.16 to 1.52 after adjustment for
Women who used talc were more likely to be
older heavier asthma sufferers regular painkiller analgesic users
The researchers further divided the groups into their menopausal status use of hormone therapy and frequency of use Findings appeared to show risk increased with increasing use of talc either by frequency of use each month or years of application
respectively Premenopausal women and postmenopausal women using hormone therapy who had more than 24 years of talc use were at the highest risk of ovarian cancer OR
2.33 95 CI 1.32 to 4.12 and OR 2.57 95 CI 1.51 to 4.36
How did the researchers interpret the results
The researchers conc" luded that Risk for ovarian cancer from genital talc use may vary by histologic subtype menopausal status at diagnosis hormone therapy use weight and smoking
They suggest the link may involve a combination of hormone activity and the immune system giving an inflammatory response to talc
Conclusion
This control study aimed to investigate the association between talc use and ovarian cancer The researchers found a significant link between genital talc use and ovarian cancer - an increase in risk of a third compared with no use
diagnosis However the study has important limitations and is not able to prove direct cause and effect Although this was a control study that made use of data collected as
part of an ongoing cohort study talc use only seems to have been assessed after cancer
The study says that subjects were personally interviewed about potential ovarian cancer risk factors that occurred more than one year before diagnosis There is therefore a possibility that women recalled their talc use inaccurately leading to misclassification of use The study also cannot determine whether the use of
talc or ovarian cancer occurred first
Additionally while the researchers attempted to control for various confounders that may be influencing the link it is possible these were not fully accounted for and other health and lifestyle factors may have been missed
Another note of caution the researchers found even higher cancer risk with higher frequency of talc use and use of hormone therapy However these analyses were based on much smaller sample sizes For example the 2.33 risk increase for premenopausal women using talc for more than 24 years involved just 41 cases and 21 controls
When subdividing the overall study sample into smaller groups based on different characteristics the resulting risk estimates are more likely to be inaccurate The most reliable figure in this study is the overall 33 risk increase that has used the full study sample simply assessing past talc use or not That being said the study's findings are in line with other reliable sources - the International Agency for Research on Cancer has classified genital talc as a possible carcinogen
So far there have been mixed results from other studies assessing the link Further research in the form of quality prospective studies would be required to confirm this
is plausible that talc could work its way up into the upper genital tract and have some type of biological impact A recent review by the American Cancer Society
recommended that women use cornstarch cosmetic products instead
Analysis by Bazian Edited by NHS Choices Follow NHS Choices on Twitter Join the Healthy Evidence forum
Analysis by Bazian Edited by NHS Choices
Links to the headlines
warn Mail Online March 4 2016
Links to the science
Cramer DW Vitonis AF KL Terry et al The association between talc use and ovarian cancer a retrospective control study in two US states Epidemiology
Published online December 17 2015
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