Urban–rural differences of gynaecological malignancies in Egypt (1999–2002)
Article first published online: 16 DEC 2009
© 2009 The Authors Journal compilation © RCOG 2009 BJOG An International Journal of Obstetrics and Gynaecology
BJOG: An International Journal of Obstetrics & Gynaecology
Volume 117, Issue 3, pages 348–355, February 2010
How to Cite
Dey, S., Hablas, A., Seifeldin, I., Ismail, K., Ramadan, M., El-Hamzawy, H., Wilson, M., Banerjee, M., Boffetta, P., Harford, J., Merajver, S. and Soliman, A. (2010), Urban–rural differences of gynaecological malignancies in Egypt (1999–2002). BJOG: An International Journal of Obstetrics & Gynaecology, 117: 348–355. doi: 10.1111/j.1471-0528.2009.02447.x
- Issue published online: 12 JAN 2010
- Article first published online: 16 DEC 2009
- Accepted 13 October 2009. Published Online 16 December 2009.
- gynaecologic cancers;
Please cite this paper as: Dey S, Hablas A, Seifeldin I, Ismail K, Ramadan M, El-Hamzawy H, Wilson M, Banerjee M, Boffetta P, Harford J, Merajver S, Soliman A. Urban–rural differences of gynaecological malignancies in Egypt (1999–2002). BJOG 2010;117:348–355.
Objective In previous studies, we have shown a three to four times higher urban incidence of breast cancer and estrogen receptor-positive breast cancers in the Gharbiah Province of Egypt. We investigated the urban–rural incidence differences of gynaecologic malignancies (uterine, ovarian and cervical cancers) to explore if they show the same trend that we found for breast cancer.
Design Cancer registry-based incidence comparison.
Setting Gharbiah population-based cancer registry (GPCR), Tanta, Egypt.
Sample All patients with uterine, ovarian and cervical cancer in GPCR from 1999 to 2002.
Methods We calculated uterine, ovarian and cervical cancer incidence from 1999 to 2002. For each of the three cancers, we calculated the overall and age-specific rates for the province as a whole, and by urban–rural status, as well as for the eight districts of the province.
Results Incidence of all three cancer sites was higher in urban than in rural areas. Uterine cancer showed the highest urban–rural incidence rate ratio (IRR = 6.07, 95% CI = 4.17, 8.85). Uterine cancer also showed the highest urban incidence in the oldest age group (70+ age category, IRR = 14.39, 95% CI = 4.24, 48.87) and in developed districts (Tanta, IRR = 4.14, 95% CI = 0.41, 42.04). Incidence rates by groups of cancer sites showed an increasing gradient of urban incidence for cancers related to hormonal aetiology, mainly of the breast and uterus (IRR = 4.96, 95% CI = 2.86, 8.61).
Conclusions The higher urban incidence of uterine cancer, coupled with our previous findings of higher incidence of breast cancer and estrogen receptor positive breast cancer in urban areas in this region, may be suggestive of possible higher exposure to environmental estrogenic compounds, such as xenoestrogens, in urban areas.