Journal
BRITISH JOURNAL OF CANCER
Volume 115, Issue 5, Pages 599-606Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/bjc.2016.165
Keywords
vulval cancer; obesity; CIN 3; Million Women Study; postmenopausal
Categories
Funding
- Cancer Research UK [C570/A16491]
- UK Medical Research Council [MR/K02700X/1]
- Cancer Research UK through an Oxford Cancer Research Centre Prize DPhil Studentship [C38302/A12981]
- Cancer Research UK (CRUK) through a CRUK Oxford Centre Clinical Research Training Fellowship [C38302/A17318]
- National Health and Medical Research Council Australia (CDF) [1082989]
- MRC [MR/K02700X/1] Funding Source: UKRI
- Cancer Research UK [16491] Funding Source: researchfish
- Medical Research Council [MR/K02700X/1] Funding Source: researchfish
- National Health and Medical Research Council of Australia [1082989] Funding Source: NHMRC
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Background: Vulval cancer predominantly affects postmenopausal women. A smaller proportion of vulval cancers, particularly at older ages, are now thought to be associated with human papillomavirus infection than previously reported, but other risk factors have not been well examined in prospective cohort studies. Methods: A total of 1.3 million women aged 49-65 years were followed for incident vulval cancer (ICD-10 C51). Adjusted Cox regression models were used to examine the relationship between reproductive and lifestyle factors and risk of vulval cancer. Results: There were 898 vulval cancers registered in the cohort over an average of 14 years of follow-up; 70% were squamous cell carcinomas. Past registration of cervical carcinoma in situ (RR 2.68; 95% CI 1.71-4.18; P<0.001), obesity (RR 1.71; 95% CI 1.44-2.04; P<0.0001), and menopause before the age of 50 years (RR 1.52; 95% CI 1.22-1.89; P<0.001) were associated with a significantly increased risk of subsequent vulval cancer. Conclusion: Past cervical pre-cancer, obesity, and earlier age at menopause are associated with an increased risk of vulval cancer at older ages.
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