RT Journal Article T1 Trajectories of alcohol consumption during life and the risk of developing breast cancer. A1 Donat-Vargas, Carolina A1 Guerrero-Zotano, Ángel A1 Casas, Ana A1 Baena-Cañada, José Manuel A1 Lope, Virginia A1 Antolín, Silvia A1 Garcia-Saénz, José Ángel A1 Bermejo, Begoña A1 Muñoz, Montserrat A1 Ramos, Manuel A1 de Juan, Ana A1 Jara Sánchez, Carlos A1 Sánchez-Rovira, Pedro A1 Antón, Antonio A1 Brunet, Joan A1 Gavilá, Joaquín A1 Salvador, Javier A1 Arriola Arellano, Esperanza A1 Bezares, Susana A1 Fernández de Larrea-Baz, Nerea A1 Pérez-Gómez, Beatriz A1 Martín, Miguel A1 Pollán, Marina K1 Alcohol K1 Breast cancer K1 Adolescence K1 Trajectories K1 Risk AB Whether there are lifetime points of greater sensitivity to the deleterious effects of alcohol intake on the breasts remains inconclusive. To compare the influence of distinctive trajectories of alcohol consumption throughout a woman's life on development of breast cancer (BC). 1278 confirmed invasive BC cases and matched (by age and residence) controls from the Epi-GEICAM study (Spain) were used. The novel group-based trajectory modelling was used to identify different alcohol consumption trajectories throughout women's lifetime. Four alcohol trajectories were identified. The first comprised women (45%) with low alcohol consumption (<5 g/day) throughout their life. The second included those (33%) who gradually moved from a low alcohol consumption in adolescence to a moderate in adulthood (5 to <15 g/day), never having a high consumption; and oppositely, women in the third trajectory (16%) moved from moderate consumption in adolescence, to a lower consumption in adulthood. Women in the fourth (6%) moved from a moderate alcohol consumption in adolescence to the highest consumption in adulthood (≥15 g/day), never having a low alcohol consumption. Comparing with the first trajectory, the fourth doubled BC risk (OR 2.19; 95% CI 1.27, 3.77), followed by the third (OR 1.44; 0.96, 2.16) and ultimately by the second trajectory (OR 1.17; 0.86, 1.58). The magnitude of BC risk was greater in postmenopausal women, especially in those with underweight or normal weight. When alcohol consumption was independently examined at each life stage, ≥15 g/day of alcohol consumption in adolescence was strongly associated with BC risk followed by consumption in adulthood. The greater the alcohol consumption accumulated throughout life, the greater the risk of BC, especially in postmenopausal women. Alcohol consumption during adolescence may particularly influence BC risk. PB Nature SN 1532-1827 YR 2021 FD 2021-09-06 LK https://hdl.handle.net/10668/25305 UL https://hdl.handle.net/10668/25305 LA en NO Donat-Vargas C, Guerrero-Zotano Á, Casas A, Baena-Cañada JM, Lope V, Antolín S, et al. Trajectories of alcohol consumption during life and the risk of developing breast cancer. Br J Cancer. 2021;125(8):1168-1176. NO This study was funded by the Fundación Científica Asociación Española Contra el Cancer (AECC) (Scientific Foundation of the Spanish Association against Cancer 2006 & 2016) (Marina Pollán), Sociedad Española de Oncología Médica (SEOM) (Spanish Society of Medical Oncology) (Miguel Martín), Scholarship ‘Contrato de atracción de talento’ from Community of Madrid (Carolina Donat-Vargas), Fundación Cerveza y Salud 2005 (Beer and Health Foundation 2005) (Miguel Martín) and Federación de Asociaciones de Mujeres con Cáncer de Mama (FECMA) (Spanish Federation of Associations of Women with Breast Cancer) (Miguel Martín, Marina Pollán). DS RISalud RD Aug 6, 2025