title: Genital powder use and risk of ovarian cancer: a pooled analysis of 8,525 cases and 9,859 controls.
abstract: Genital powder use has been associated with risk of epithelial ovarian cancer in some, but not all, epidemiologic investigations, possibly reflecting the carcinogenic effects of talc particles found in most of these products. Whether risk increases with number of genital powder applications and for all histologic types of ovarian cancer also remains uncertain. Therefore, we estimated the association between self-reported genital powder use and epithelial ovarian cancer risk in eight population-based case-control studies. Individual data from each study were collected and harmonized. Lifetime number of genital powder applications was estimated from duration and frequency of use. Pooled ORs were calculated using conditional logistic regression matched on study and age and adjusted for potential confounders. Subtype-specific risks were estimated according to tumor behavior and histology. 8,525 cases and 9,859 controls were included in the analyses. Genital powder use was associated with a modest increased risk of epithelial ovarian cancer [OR, 1.24; 95% confidence interval (CI), 1.15-1.33] relative to women who never used powder. Risk was elevated for invasive serous (OR, 1.20; 95% CI, 1.09-1.32), endometrioid (OR, 1.22; 95% CI, 1.04-1.43), and clear cell (OR, 1.24; 95% CI, 1.01-1.52) tumors, and for borderline serous tumors (OR, 1.46; 95% CI, 1.24-1.72). Among genital powder users, we observed no significant trend (P = 0.17) in risk with increasing number of lifetime applications (assessed in quartiles). We noted no increase in risk among women who only reported nongenital powder use. In summary, genital powder use is a modifiable exposure associated with small-to-moderate increases in risk of most histologic subtypes of epithelial ovarian cancer.
authors.affiliation: Obstetrics and Gynecology Epidemiology Center, Brigham and Women's Hospital, Boston, MA 02115, USA. kterry@partners.org
authors.forename: Kathryn L
authors.initials: KL
authors.lastname: Terry
authors.forename: Stalo
authors.initials: S
authors.lastname: Karageorgi
authors.forename: Yurii B
authors.initials: YB
authors.lastname: Shvetsov
authors.forename: Melissa A
authors.initials: MA
authors.lastname: Merritt
authors.forename: Galina
authors.initials: G
authors.lastname: Lurie
authors.forename: Pamela J
authors.initials: PJ
authors.lastname: Thompson
authors.forename: Michael E
authors.initials: ME
authors.lastname: Carney
authors.forename: Rachel Palmieri
authors.initials: RP
authors.lastname: Weber
authors.forename: Lucy
authors.initials: L
authors.lastname: Akushevich
authors.forename: Wei-Hsuan
authors.initials: WH
authors.lastname: Lo-Ciganic
authors.forename: Kara
authors.initials: K
authors.lastname: Cushing-Haugen
authors.forename: Weiva
authors.initials: W
authors.lastname: Sieh
authors.forename: Kirsten
authors.initials: K
authors.lastname: Moysich
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: Doherty
authors.forename: Christina M
authors.initials: CM
authors.lastname: Nagle
authors.forename: Andrew
authors.initials: A
authors.lastname: Berchuck
authors.forename: Celeste L
authors.initials: CL
authors.lastname: Pearce
authors.forename: Malcolm
authors.initials: M
authors.lastname: Pike
authors.forename: Roberta B
authors.initials: RB
authors.lastname: Ness
authors.forename: Penelope M
authors.initials: PM
authors.lastname: Webb
authors.forename: Mary Anne
authors.initials: MA
authors.lastname: Rossing
authors.forename: Joellen
authors.initials: J
authors.lastname: Schildkraut
authors.forename: Harvey
authors.initials: H
authors.lastname: Risch
authors.forename: Marc T
authors.initials: MT
authors.lastname: Goodman
mesh_terms: D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008875:Middle Aged; D016017:Odds Ratio; D010051:Ovarian Neoplasms / Q000209:etiology* / Q000473:pathology; D011208:Powders / Q000009:adverse effects*; D011379:Prognosis; D013627:Talc / Q000009:adverse effects*
chemical_list: D011208:Powders; D013627:Talc