Male circumcision and serologically determined human papillomavirus infection in a birth cohort | 2009
Dickson, N. P. , Ryding, J. , van Roode, ... Show all » T. , Paul, C. , Herbison, P. , Dillner, J. , Skegg, D. C. « Hide
Cancer Epidemiology Biomarkers & Prevention, 2009, 18(18), 177-83.
www.ncbi.nlm.nih.gov/pubmed/19124496
Our ref: RO575
Show abstract » Circumcision has been reported to protect against infection with human papillomavirus (HPV) in men, but results have been inconsistent. We followed males in a birth cohort born in Dunedin, New Zealand, in 1972 and 1973 from age 3 to 32 years. Seropositivity at age 32 years for the oncogenic types HPV-16 and 18, and the nononcogenic types 6 and 11, was studied in relation to maternal reports of circumcision status at age 3 for 450 men. Seropositivity to any of these types was associated with lifetime number of sexual partners (P = 0.03), and lower moral-religious emphasis of the family of origin (P < 0.001). Circumcision was not found to be protective, with the adjusted odds ratio (95% confidence interval) for HPV6/11/16/18 seropositivity among the circumcised compared with the uncircumcised being 1.4 (0.89-2.2).
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Circumcision and risk of sexually transmitted infections in a birth cohort | 2008
Dickson, N., van Roode, T., Herbison, ... Show all » G. P. , Paul, C. « Hide
Journal of Pediatrics, 2008, 152(152), 383-387.
Our ref: RO554
Show abstract » Objective: To determine the impact of early childhood circumcision on sexually transmitted infection (STI) acquisition to age 32 years. Study design: The circumcision status of a cohort of children born in 1972 and 1973 in Dunedin, New Zealand was sought at age 3 years. Information about STIs was obtained at ages 21, 26, and 32 years. The incidence rates of STI acquisition were calculated, taking into account timing of first sex, and comparisons were made between the circumcised men and uncircumcised men. Adjustments were made for potential socioeconomic and sexual behavior confounding factors where appropriate. Results: Of the 499 men studied, 201 (40.3%) had been circumcised by age 3 years. The circumcised and uncircumcised groups differed little in socioeconomic characteristics and sexual behavior. Overall, up to age 32 years, the incidence rates for all STIs were not statistically significantly different—23.4 and 24.4 per 1000 person-years for the uncircumcised and circumcised men, respectively. This was not affected by adjusting for any of the socioeconomic or sexual behavior characteristics. Conclusions: These findings are consistent with recent population-based cross-sectional studies in developed countries, which found that early childhood circumcision does not markedly reduce the risk of the common STIs in the general population in such countries.
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Herpes simplex virus type-2 status at age 26 is not related to early circumcision in a birth cohort | 2005
Dickson, N., van Roode, T., Paul, ... Show all » C. « Hide
Sexually Transmitted Diseases, 2005, 32(32), 517-519.
Our ref: RO489
Show abstract » Objectives: To determine if circumcision in early childhood affects the risk of acquiring herpes simplex virus type-2 (HSV-2) infection. Study Design: Study members were born in 1972/73 in Dunedin, New Zealand. Circumcision status was sought at age 3, when the cohort was established. Information about sexual behaviour was obtained at ages 21 and 26. Serum was tested for HSV-2 antibodies at age 26 for 435 men (82.9% of the surviving cohort). Results: Of eligible men, 40.2% had been circumcised. The prevalence of HSV-2 antibodies was 7.3% in uncircumcised men and 7.4% in circumcised men. Social and sexual factors were very similar between the two groups and adjustment had no effect on the association (odds ratio=1.1, 95% CI 0.46-2.5). Seroconversion rates according to years since first sexual intercourse were 0.85 and 0.86 per 100 person-years for uncircumcised and circumcised men. Conclusion: The results support a lack of association between circumcision status and HSV-2 acquisition, although a small effect cannot be ruled out.
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