Susan JordanLynette LimDuangkae VilainerunEmily BanksNintita SripaiboonkijSam ang SeubsmanAdrian SleighChristopher BainUniversity of QueenslandAustralian National UniversitySukhothai Thammathirat Open UniversityMahidol University2018-09-132018-09-132009-10-01Breast. Vol.18, No.5 (2009), 299-303096097762-s2.0-71349087913https://repository.li.mahidol.ac.th/handle/123456789/27912Breast cancer incidence may be increasing in Thailand but very little research has assessed core breast cancer risk factors in this country. We used baseline questionnaire data from a national cohort study of Thai Open University students in an exploratory case-control study of breast cancer. The study included 43 female cases and 860 age-matched controls selected from the remaining 47,271 female cohort participants. Odds ratios and 95% confidence intervals were calculated using conditional logistic regression. The women were predominantly premenopausal. Taller women had an increased risk of breast cancer (OR = 2.3, 95% CI 1.1-4.8, for height ≥160 cm vs ≤154 cm) as did women with non-insulin dependent diabetes mellitus (OR = 8.4, 95% CI 1.7-41). Women with older siblings had a reduced risk of breast cancer compared to those firstborn (OR = 0.3, 95% CI0.2-0.7). Although limited by small case numbers, our findings suggest substantial increases in breast cancer rates in Thailand could be expected in the future. © 2009 Elsevier Ltd. All rights reserved.Mahidol UniversityMedicineArticleSCOPUS10.1016/j.breast.2009.09.004