Chan DS, Vieira AR, Aune D, Bandera EV, Greenwood DC, McTiernan A, Navarro Rosenblatt D, Thune I, Vieira R, Norat T. Body mass index and survival in women with breast cancer-systematic literature review and meta-analysis of 82 follow-up studies. Ann Oncol 2014;25(10):1901-14. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4176449/pdf/mdu042.pdf
Xia X, Chen W, Li J, Chen X, Rui R, Liu C, Sun Y, Liu L, Gong J, Yuan P. Body mass index and risk of breast cancer: a nonlinear dose-response meta-analysis of prospective studies. Sci Rep 2014;4:7480. https://www.nature.com/articles/srep07480.pdf
Wang F, Liu L, Cui S, Tian F, Fan Z, Geng C, et al. Distinct Effects of Body Mass Index and Waist/Hip Ratio on Risk of Breast Cancer by Joint Estrogen and Progestogen Receptor Status: Results from a Case-Control Study in Northern and Eastern China and Implications for Chemoprevention. Oncologist 2017 Sep 14. pii: theoncologist.2017-0148. doi: 10.1634/theoncologist.2017-0148. [Epub ahead of print]. http://theoncologist.alphamedpress.org/content/early/2017/08/25/theoncologist.2017-0148.full.pdf+html
Picon-Ruiz M, Morata-Tarifa C, Valle-Goffin JJ, Friedman ER, Slingerland JM. Obesity and adverse breast cancer risk and outcome: Mechanistic insights and strategies for intervention. CA Cancer J Clin 2017;67(5):378-397. http://onlinelibrary.wiley.com/doi/10.3322/caac.21405/epdf
Zhang M, Cai H, Bao P, Xu W, Qin G, Shu XO, Zheng Y. Body mass index, waist-to-hip ratio and late outcomes: a report from the Shanghai Breast Cancer Survival Study. Sci Rep 2017;7(1):6996. https://www.nature.com/articles/s41598-017-07320-7.pdf
van Helmond N, Timmerman H, van Dasselaar NT, van de Pol CC, Olesen SS, Drewes AM, Vissers K, Wilder-Smith OH, Steegers MA. High Body Mass Index Is a Potential Risk Factor for Persistent Postoperative Pain after Breast Cancer Treatment. Pain Physician 2017;20(5):E661-E671. http://www.painphysicianjournal.com/current/pdf?article=NDUxNA%3D%3D&journal=106
Ding YY, Yao P, Wu L, Han ZK, Hong T, Zhu YQ, Li HX. Body mass index and persistent pain after breast cancer surgery: findings from the women's healthy eating and living study and a meta-analysis. Oncotarget 2017;8(26):43332-43343. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5522149/pdf/oncotarget-08-43332.pdf
Since you are particularly interested in screening, you may find the following papers of use:
Variation in Breast Cancer-Risk Factor Associations by Method of Detection: Results From a Series of Case-Control Studies.
Sprague BL, Gangnon RE, Hampton JM, Egan KM, Titus LJ, Kerlikowske K, Remington PL, Newcomb PA, Trentham-Dietz A.
Am J Epidemiol. 2015 Jun 15;181(12):956-69.
Body mass index and breast cancer risk according to postmenopausal estrogen-progestin use and hormone receptor status.
Munsell MF, Sprague BL, Berry DA, Chisholm G, Trentham-Dietz A.
Epidemiol Rev. 2014;36:114-36.
Modification of breast cancer risk according to age and menopausal status: a combined analysis of five population-based case-control studies.
Trentham-Dietz A, Sprague BL, Hampton JM, Miglioretti DL, Nelson HD, Titus LJ, Egan KM, Remington PL, Newcomb PA.
Breast Cancer Res Treat. 2014 May;145(1):165-75.
Risk factors for breast cancer for women aged 40 to 49 years: a systematic review and meta-analysis.
Nelson HD, Zakher B, Cantor A, Fu R, Griffin J, O'Meara ES, Buist DS, Kerlikowske K, van Ravesteyn NT, Trentham-Dietz A, Mandelblatt JS, Miglioretti DL.
Ann Intern Med. 2012 May 1;156(9):635-48.
Personalizing mammography by breast density and other risk factors for breast cancer: analysis of health benefits and cost-effectiveness.