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1. Mendelian randomisation study of height and body mass index as modifiers of ovarian cancer risk in 22,588 BRCA1 and BRCA2 mutation carriers.

Author

Qian F, Rookus MA, Leslie G, Risch HA, Greene MH, Aalfs CM, Adank MA, Adlard J, Agnarsson BA, Ahmed M, Aittomäki K, Andrulis IL, Arnold N, Arun BK, Ausems MGEM, Azzollini J, Barrowdale D, Barwell J, Benitez J, Białkowska K, Bonadona V, Borde J, Borg A, Bradbury AR, Brunet J, Buys SS, Caldés T, Caligo MA, Campbell I, Carter J, Chiquette J, Chung WK, Claes KBM, Collée JM, Collonge-Rame MA, Couch FJ, Daly MB, Delnatte C, Diez O, Domchek SM, Dorfling CM, Eason J, Easton DF, Eeles R, Engel C, Evans DG, Faivre L, Feliubadaló L, Foretova L, Friedman E, Frost D, Ganz PA, Garber J, Garcia-Barberan V, Gehrig A, Glendon G, Godwin AK, Gómez Garcia EB, Hamann U, Hauke J, Hopper JL, Hulick PJ, Imyanitov EN, Isaacs C, Izatt L, Jakubowska A, Janavicius R, John EM, Karlan BY, Kets CM, Laitman Y, Lázaro C, Leroux D, Lester J, Lesueur F, Loud JT, Lubiński J, Łukomska A, McGuffog L, Mebirouk N, Meijers-Heijboer HEJ, Meindl A, Miller A, Montagna M, Mooij TM, Mouret-Fourme E, Nathanson KL, Nehoray B, Neuhausen SL, Nevanlinna H, Nielsen FC, Offit K, Olah E, Ong KR, Oosterwijk JC, Ottini L, Parsons MT, Peterlongo P, Pfeiler G, Pradhan N, Radice P, Ramus SJ, Rantala J, Rennert G, Robson M, Rodriguez GC, Salani R, Scheuner MT, Schmutzler RK, Shah PD, Side LE, Simard J, Singer CF, Steinemann D, Stoppa-Lyonnet D, Tan YY, Teixeira MR, Terry MB, Thomassen M, Tischkowitz M, Tognazzo S, Toland AE, Tung N, van Asperen CJ, van Engelen K, van Rensburg EJ, Venat-Bouvet L, Vierstraete J, Wagner G, Walker L, Weitzel JN, Yannoukakos D, Antoniou AC, Goldgar DE, Olopade OI, Chenevix-Trench G, Rebbeck TR, and Huo D

Subjects
Adult, Aged, Female, Humans, Menopause, Middle Aged, Ovarian Neoplasms genetics, Proportional Hazards Models, Body Height, Body Mass Index, Genes, BRCA1, Genes, BRCA2, Heterozygote, Mendelian Randomization Analysis, Mutation, Ovarian Neoplasms etiology
Abstract

Background: Height and body mass index (BMI) are associated with higher ovarian cancer risk in the general population, but whether such associations exist among BRCA1/2 mutation carriers is unknown., Methods: We applied a Mendelian randomisation approach to examine height/BMI with ovarian cancer risk using the Consortium of Investigators for the Modifiers of BRCA1/2 (CIMBA) data set, comprising 14,676 BRCA1 and 7912 BRCA2 mutation carriers, with 2923 ovarian cancer cases. We created a height genetic score (height-GS) using 586 height-associated variants and a BMI genetic score (BMI-GS) using 93 BMI-associated variants. Associations were assessed using weighted Cox models., Results: Observed height was not associated with ovarian cancer risk (hazard ratio [HR]: 1.07 per 10-cm increase in height, 95% confidence interval [CI]: 0.94-1.23). Height-GS showed similar results (HR = 1.02, 95% CI: 0.85-1.23). Higher BMI was significantly associated with increased risk in premenopausal women with HR = 1.25 (95% CI: 1.06-1.48) and HR = 1.59 (95% CI: 1.08-2.33) per 5-kg/m 2 increase in observed and genetically determined BMI, respectively. No association was found for postmenopausal women. Interaction between menopausal status and BMI was significant (P interaction  < 0.05)., Conclusion: Our observation of a positive association between BMI and ovarian cancer risk in premenopausal BRCA1/2 mutation carriers is consistent with findings in the general population.

Published
2019
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2. Height and Body Mass Index as Modifiers of Breast Cancer Risk in BRCA1/2 Mutation Carriers: A Mendelian Randomization Study.

Author

Qian F, Wang S, Mitchell J, McGuffog L, Barrowdale D, Leslie G, Oosterwijk JC, Chung WK, Evans DG, Engel C, Kast K, Aalfs CM, Adank MA, Adlard J, Agnarsson BA, Aittomäki K, Alducci E, Andrulis IL, Arun BK, Ausems MGEM, Azzollini J, Barouk-Simonet E, Barwell J, Belotti M, Benitez J, Berger A, Borg A, Bradbury AR, Brunet J, Buys SS, Caldes T, Caligo MA, Campbell I, Caputo SM, Chiquette J, Claes KBM, Margriet Collée J, Couch FJ, Coupier I, Daly MB, Davidson R, Diez O, Domchek SM, Donaldson A, Dorfling CM, Eeles R, Feliubadaló L, Foretova L, Fowler J, Friedman E, Frost D, Ganz PA, Garber J, Garcia-Barberan V, Glendon G, Godwin AK, Gómez Garcia EB, Gronwald J, Hahnen E, Hamann U, Henderson A, Hendricks CB, Hopper JL, Hulick PJ, Imyanitov EN, Isaacs C, Izatt L, Izquierdo Á, Jakubowska A, Kaczmarek K, Kang E, Karlan BY, Kets CM, Kim SW, Kim Z, Kwong A, Laitman Y, Lasset C, Hyuk Lee M, Won Lee J, Lee J, Lester J, Lesueur F, Loud JT, Lubinski J, Mebirouk N, Meijers-Heijboer HEJ, Meindl A, Miller A, Montagna M, Mooij TM, Morrison PJ, Mouret-Fourme E, Nathanson KL, Neuhausen SL, Nevanlinna H, Niederacher D, Nielsen FC, Nussbaum RL, Offit K, Olah E, Ong KR, Ottini L, Park SK, Peterlongo P, Pfeiler G, Phelan CM, Poppe B, Pradhan N, Radice P, Ramus SJ, Rantala J, Robson M, Rodriguez GC, Schmutzler RK, Hutten Selkirk CG, Shah PD, Simard J, Singer CF, Sokolowska J, Stoppa-Lyonnet D, Sutter C, Yen Tan Y, Teixeira RM, Teo SH, Terry MB, Thomassen M, Tischkowitz M, Toland AE, Tucker KM, Tung N, van Asperen CJ, van Engelen K, van Rensburg EJ, Wang-Gohrke S, Wappenschmidt B, Weitzel JN, Yannoukakos D, Greene MH, Rookus MA, Easton DF, Chenevix-Trench G, Antoniou AC, Goldgar DE, Olopade OI, Rebbeck TR, and Huo D

Subjects
Adult, Breast Neoplasms pathology, Female, Genetic Predisposition to Disease, Humans, Polymorphism, Single Nucleotide, Prognosis, Risk Factors, BRCA1 Protein genetics, BRCA2 Protein genetics, Body Height, Body Mass Index, Breast Neoplasms etiology, Mendelian Randomization Analysis, Mutation
Abstract

Background: BRCA1/2 mutations confer high lifetime risk of breast cancer, although other factors may modify this risk. Whether height or body mass index (BMI) modifies breast cancer risk in BRCA1/2 mutation carriers remains unclear., Methods: We used Mendelian randomization approaches to evaluate the association of height and BMI on breast cancer risk, using data from the Consortium of Investigators of Modifiers of BRCA1/2 with 14 676 BRCA1 and 7912 BRCA2 mutation carriers, including 11 451 cases of breast cancer. We created a height genetic score using 586 height-associated variants and a BMI genetic score using 93 BMI-associated variants. We examined both observed and genetically determined height and BMI with breast cancer risk using weighted Cox models. All statistical tests were two-sided., Results: Observed height was positively associated with breast cancer risk (HR = 1.09 per 10 cm increase, 95% confidence interval [CI] = 1.0 to 1.17; P = 1.17). Height genetic score was positively associated with breast cancer, although this was not statistically significant (per 10 cm increase in genetically predicted height, HR = 1.04, 95% CI = 0.93 to 1.17; P = .47). Observed BMI was inversely associated with breast cancer risk (per 5 kg/m2 increase, HR = 0.94, 95% CI = 0.90 to 0.98; P = .007). BMI genetic score was also inversely associated with breast cancer risk (per 5 kg/m2 increase in genetically predicted BMI, HR = 0.87, 95% CI = 0.76 to 0.98; P = .02). BMI was primarily associated with premenopausal breast cancer., Conclusion: Height is associated with overall breast cancer and BMI is associated with premenopausal breast cancer in BRCA1/2 mutation carriers. Incorporating height and BMI, particularly genetic score, into risk assessment may improve cancer management., (© The Author(s) 2018. Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oup.com.)

Published
2019
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3. Height and Body Mass Index as Modifiers of Breast Cancer Risk in BRCA1/2 Mutation Carriers: A Mendelian Randomization Study

Author

Qian, Frank, Wang, Shengfeng, Mitchell, Jonathan, McGuffog, Lesley, Barrowdale, Daniel, Leslie, Goska, Oosterwijk, Jan C, Chung, Wendy K, Evans, D Gareth, Engel, Christoph, Kast, Karin, Aalfs, Cora M, Adank, Muriel A, Adlard, Julian, Agnarsson, Bjarni A, Aittomäki, Kristiina, Alducci, Elisa, Andrulis, Irene L, Arun, Banu K, Ausems, Margreet GEM, Azzollini, Jacopo, Barouk-Simonet, Emmanuelle, Barwell, Julian, Belotti, Muriel, Benitez, Javier, Berger, Andreas, Borg, Ake, Bradbury, Angela R, Brunet, Joan, Buys, Saundra S, Caldes, Trinidad, Caligo, Maria A, Campbell, Ian, Caputo, Sandrine M, Chiquette, Jocelyne, Claes, Kathleen BM, Margriet Collée, J, Couch, Fergus J, Coupier, Isabelle, Daly, Mary B, Davidson, Rosemarie, Diez, Orland, Domchek, Susan M, Donaldson, Alan, Dorfling, Cecilia M, Eeles, Ros, Feliubadaló, Lidia, Foretova, Lenka, Fowler, Jeffrey, Friedman, Eitan, Frost, Debra, Ganz, Patricia A, Garber, Judy, Garcia-Barberan, Vanesa, Glendon, Gord, Godwin, Andrew K, Gómez Garcia, Encarna B, Gronwald, Jacek, Hahnen, Eric, Hamann, Ute, Henderson, Alex, Hendricks, Carolyn B, Hopper, John L, Hulick, Peter J, Imyanitov, Evgeny N, Isaacs, Claudine, Izatt, Louise, Izquierdo, Ángel, Jakubowska, Anna, Kaczmarek, Katarzyna, Kang, Eunyoung, Karlan, Beth Y, Kets, Carolien M, Kim, Sung-Won, Kim, Zisun, Kwong, Ava, Laitman, Yael, Lasset, Christine, Hyuk Lee, Min, Won Lee, Jong, Lee, Jihyoun, Lester, Jenny, Lesueur, Fabienne, Loud, Jennifer T, Lubinski, Jan, Mebirouk, Noura, Meijers-Heijboer, Hanne EJ, Meindl, Alfons, Miller, Austin, Montagna, Marco, Mooij, Thea M, Morrison, Patrick J, Mouret-Fourme, Emmanuelle, Nathanson, Katherine L, Neuhausen, Susan L, Nevanlinna, Heli, Niederacher, Dieter, Nielsen, Finn C, Nussbaum, Robert L, and Offit, Kenneth

Subjects
Adult, Clinical Trials and Supportive Activities, Oncology and Carcinogenesis, Breast Neoplasms, EMBRACE, Body Mass Index, GEMO Study Collaborators, Risk Factors, Clinical Research, Breast Cancer, Genetics, Humans, 2.1 Biological and endogenous factors, Genetic Predisposition to Disease, Genetic Testing, Oncology & Carcinogenesis, Polymorphism, Aetiology, skin and connective tissue diseases, HEBON, Cancer, BRCA2 Protein, BRCA1 Protein, Prevention, Single Nucleotide, Mendelian Randomization Analysis, Prognosis, Body Height, Mutation, Female
Abstract

BackgroundBRCA1/2 mutations confer high lifetime risk of breast cancer, although other factors may modify this risk. Whether height or body mass index (BMI) modifies breast cancer risk in BRCA1/2 mutation carriers remains unclear.MethodsWe used Mendelian randomization approaches to evaluate the association of height and BMI on breast cancer risk, using data from the Consortium of Investigators of Modifiers of BRCA1/2 with 14 676 BRCA1 and 7912 BRCA2 mutation carriers, including 11 451 cases of breast cancer. We created a height genetic score using 586 height-associated variants and a BMI genetic score using 93 BMI-associated variants. We examined both observed and genetically determined height and BMI with breast cancer risk using weighted Cox models. All statistical tests were two-sided.ResultsObserved height was positively associated with breast cancer risk (HR = 1.09 per 10 cm increase, 95% confidence interval [CI] = 1.0 to 1.17; P = 1.17). Height genetic score was positively associated with breast cancer, although this was not statistically significant (per 10 cm increase in genetically predicted height, HR = 1.04, 95% CI = 0.93 to 1.17; P = .47). Observed BMI was inversely associated with breast cancer risk (per 5 kg/m2 increase, HR = 0.94, 95% CI = 0.90 to 0.98; P = .007). BMI genetic score was also inversely associated with breast cancer risk (per 5 kg/m2 increase in genetically predicted BMI, HR = 0.87, 95% CI = 0.76 to 0.98; P = .02). BMI was primarily associated with premenopausal breast cancer.ConclusionHeight is associated with overall breast cancer and BMI is associated with premenopausal breast cancer in BRCA1/2 mutation carriers. Incorporating height and BMI, particularly genetic score, into risk assessment may improve cancer management.

Published
2019

4. Height and Body Mass Index as Modifiers of Breast Cancer Risk in BRCA1/2 Mutation Carriers: A Mendelian Randomization Study

Author

Qian, Frank, Wang, Shengfeng, Mitchell, Jonathan, McGuffog, Lesley, Barrowdale, Daniel, Leslie, Goska, Oosterwijk, Jan C, Chung, Wendy K, Evans, D Gareth, Engel, Christoph, Kast, Karin, Aalfs, Cora M, Adank, Muriel A, Adlard, Julian, Agnarsson, Bjarni A, Aittomäki, Kristiina, Alducci, Elisa, Andrulis, Irene L, Arun, Banu K, Ausems, Margreet GEM, Azzollini, Jacopo, Barouk-Simonet, Emmanuelle, Barwell, Julian, Belotti, Muriel, Benitez, Javier, Berger, Andreas, Borg, Ake, Bradbury, Angela R, Brunet, Joan, Buys, Saundra S, Caldes, Trinidad, Caligo, Maria A, Campbell, Ian, Caputo, Sandrine M, Chiquette, Jocelyne, Claes, Kathleen BM, Margriet Collée, J, Couch, Fergus J, Coupier, Isabelle, Daly, Mary B, Davidson, Rosemarie, Diez, Orland, Domchek, Susan M, Donaldson, Alan, Dorfling, Cecilia M, Eeles, Ros, Feliubadaló, Lidia, Foretova, Lenka, Fowler, Jeffrey, Friedman, Eitan, Frost, Debra, Ganz, Patricia A, Garber, Judy, Garcia-Barberan, Vanesa, Glendon, Gord, Godwin, Andrew K, Gómez Garcia, Encarna B, Gronwald, Jacek, Hahnen, Eric, Hamann, Ute, Henderson, Alex, Hendricks, Carolyn B, Hopper, John L, Hulick, Peter J, Imyanitov, Evgeny N, Isaacs, Claudine, Izatt, Louise, Izquierdo, Ángel, Jakubowska, Anna, Kaczmarek, Katarzyna, Kang, Eunyoung, Karlan, Beth Y, Kets, Carolien M, Kim, Sung-Won, Kim, Zisun, Kwong, Ava, Laitman, Yael, Lasset, Christine, Hyuk Lee, Min, Won Lee, Jong, Lee, Jihyoun, Lester, Jenny, Lesueur, Fabienne, Loud, Jennifer T, Lubinski, Jan, Mebirouk, Noura, Meijers-Heijboer, Hanne EJ, Meindl, Alfons, Miller, Austin, Montagna, Marco, Mooij, Thea M, Morrison, Patrick J, Mouret-Fourme, Emmanuelle, Nathanson, Katherine L, Neuhausen, Susan L, Nevanlinna, Heli, Niederacher, Dieter, Nielsen, Finn C, Nussbaum, Robert L, Offit, Kenneth, Olah, Edith, Ong, Kai-Ren, Ottini, Laura, Park, Sue K, Peterlongo, Paolo, Pfeiler, Georg, Phelan, Catherine M, Poppe, Bruce, Pradhan, Nisha, Radice, Paolo, Ramus, Susan J, Rantala, Johanna, Robson, Mark, Rodriguez, Gustavo C, Schmutzler, Rita K, Hutten Selkirk, Christina G, Shah, Payal D, Simard, Jacques, Singer, Christian F, Sokolowska, Johanna, Stoppa-Lyonnet, Dominique, Sutter, Christian, Yen Tan, Yen, Teixeira, R Manuel, Teo, Soo H, Terry, Mary Beth, Thomassen, Mads, Tischkowitz, Marc, Toland, Amanda E, Tucker, Katherine M, Tung, Nadine, Van Asperen, Christi J, Van Engelen, Klaartje, Van Rensburg, Elizabeth J, Wang-Gohrke, Shan, Wappenschmidt, Barbara, Weitzel, Jeffrey N, Yannoukakos, Drakoulis, GEMO Study Collaborators, HEBON, EMBRACE, Greene, Mark H, Rookus, Matti A, Easton, Douglas F, Chenevix-Trench, Georgia, Antoniou, Antonis C, Goldgar, David E, Olopade, Olufunmilayo I, Rebbeck, Timothy R, and Huo, Dezheng

Subjects
2. Zero hunger, Adult, BRCA2 Protein, BRCA1 Protein, Breast Neoplasms, Mendelian Randomization Analysis, Prognosis, Polymorphism, Single Nucleotide, Body Height, Body Mass Index, Risk Factors, Mutation, Humans, Female, Genetic Predisposition to Disease, skin and connective tissue diseases
Abstract

BACKGROUND: BRCA1/2 mutations confer high lifetime risk of breast cancer, although other factors may modify this risk. Whether height or body mass index (BMI) modifies breast cancer risk in BRCA1/2 mutation carriers remains unclear. METHODS: We used Mendelian randomization approaches to evaluate the association of height and BMI on breast cancer risk, using data from the Consortium of Investigators of Modifiers of BRCA1/2 with 14 676 BRCA1 and 7912 BRCA2 mutation carriers, including 11 451 cases of breast cancer. We created a height genetic score using 586 height-associated variants and a BMI genetic score using 93 BMI-associated variants. We examined both observed and genetically determined height and BMI with breast cancer risk using weighted Cox models. All statistical tests were two-sided. RESULTS: Observed height was positively associated with breast cancer risk (HR = 1.09 per 10 cm increase, 95% confidence interval [CI] = 1.0 to 1.17; P = 1.17). Height genetic score was positively associated with breast cancer, although this was not statistically significant (per 10 cm increase in genetically predicted height, HR = 1.04, 95% CI = 0.93 to 1.17; P = .47). Observed BMI was inversely associated with breast cancer risk (per 5 kg/m2 increase, HR = 0.94, 95% CI = 0.90 to 0.98; P = .007). BMI genetic score was also inversely associated with breast cancer risk (per 5 kg/m2 increase in genetically predicted BMI, HR = 0.87, 95% CI = 0.76 to 0.98; P = .02). BMI was primarily associated with premenopausal breast cancer. CONCLUSION: Height is associated with overall breast cancer and BMI is associated with premenopausal breast cancer in BRCA1/2 mutation carriers. Incorporating height and BMI, particularly genetic score, into risk assessment may improve cancer management.

5. Mendelian randomisation study of height and body mass index as modifiers of ovarian cancer risk in 22,588 BRCA1 and BRCA2 mutation carriers

Author

Qian, Frank, Rookus, Matti A, Leslie, Goska, Risch, Harvey A, Greene, Mark H, Aalfs, Cora M, Adank, Muriel A, Adlard, Julian, Agnarsson, Bjarni A, Ahmed, Munaza, Aittomäki, Kristiina, Andrulis, Irene L, Arnold, Norbert, Arun, Banu K, Ausems, Margreet GEM, Azzollini, Jacopo, Barrowdale, Daniel, Barwell, Julian, Benitez, Javier, Białkowska, Katarzyna, Bonadona, Valérie, Borde, Julika, Borg, Ake, Bradbury, Angela R, Brunet, Joan, Buys, Saundra S, Caldés, Trinidad, Caligo, Maria A, Campbell, Ian, Carter, Jonathan, Chiquette, Jocelyne, Chung, Wendy K, Claes, Kathleen BM, Collée, J Margriet, Collonge-Rame, Marie-Agnès, Couch, Fergus J, Daly, Mary B, Delnatte, Capucine, Diez, Orland, Domchek, Susan M, Dorfling, Cecilia M, Eason, Jacqueline, Easton, Douglas F, Eeles, Ros, Engel, Christoph, Evans, D Gareth, Faivre, Laurence, Feliubadaló, Lidia, Foretova, Lenka, Friedman, Eitan, Frost, Debra, Ganz, Patricia A, Garber, Judy, Garcia-Barberan, Vanesa, Gehrig, Andrea, Glendon, Gord, Godwin, Andrew K, Gómez Garcia, Encarna B, Hamann, Ute, Hauke, Jan, Hopper, John L, Hulick, Peter J, Imyanitov, Evgeny N, Isaacs, Claudine, Izatt, Louise, Jakubowska, Anna, Janavicius, Ramunas, John, Esther M, Karlan, Beth Y, Kets, Carolien M, Laitman, Yael, Lázaro, Conxi, Leroux, Dominique, Lester, Jenny, Lesueur, Fabienne, Loud, Jennifer T, Lubiński, Jan, Łukomska, Alicja, McGuffog, Lesley, Mebirouk, Noura, Meijers-Heijboer, Hanne EJ, Meindl, Alfons, Miller, Austin, Montagna, Marco, Mooij, Thea M, Mouret-Fourme, Emmanuelle, Nathanson, Katherine L, Nehoray, Bita, Neuhausen, Susan L, Nevanlinna, Heli, Nielsen, Finn C, Offit, Kenneth, Olah, Edith, Ong, Kai-Ren, Oosterwijk, Jan C, Ottini, Laura, Parsons, Michael T, Peterlongo, Paolo, Pfeiler, Georg, Pradhan, Nisha, Radice, Paolo, Ramus, Susan J, Rantala, Johanna, Rennert, Gad, Robson, Mark, Rodriguez, Gustavo C, Salani, Ritu, Scheuner, Maren T, Schmutzler, Rita K, Shah, Payal D, Side, Lucy E, Simard, Jacques, Singer, Christian F, Steinemann, Doris, Stoppa-Lyonnet, Dominique, Tan, Yen Yen, Teixeira, Manuel R, Terry, Mary Beth, Thomassen, Mads, Tischkowitz, Marc, Tognazzo, Silvia, Toland, Amanda E, Tung, Nadine, Van Asperen, Christi J, Van Engelen, Klaartje, Van Rensburg, Elizabeth J, Venat-Bouvet, Laurence, Vierstraete, Jeroen, Wagner, Gabriel, Walker, Lisa, Weitzel, Jeffrey N, Yannoukakos, Drakoulis, KConFab Investigators, HEBON Investigators, GEMO Study Collaborators, EMBRACE Collaborators, Antoniou, Antonis C, Goldgar, David E, Olopade, Olufunmilayo I, Chenevix-Trench, Georgia, Rebbeck, Timothy R, Huo, Dezheng, and CIMBA

Subjects
2. Zero hunger, Adult, Ovarian Neoplasms, Heterozygote, Genes, BRCA2, Genes, BRCA1, Mendelian Randomization Analysis, Middle Aged, Body Height, 3. Good health, Body Mass Index, Mutation, Humans, Female, Menopause, Aged, Proportional Hazards Models
Abstract

BACKGROUND: Height and body mass index (BMI) are associated with higher ovarian cancer risk in the general population, but whether such associations exist among BRCA1/2 mutation carriers is unknown. METHODS: We applied a Mendelian randomisation approach to examine height/BMI with ovarian cancer risk using the Consortium of Investigators for the Modifiers of BRCA1/2 (CIMBA) data set, comprising 14,676 BRCA1 and 7912 BRCA2 mutation carriers, with 2923 ovarian cancer cases. We created a height genetic score (height-GS) using 586 height-associated variants and a BMI genetic score (BMI-GS) using 93 BMI-associated variants. Associations were assessed using weighted Cox models. RESULTS: Observed height was not associated with ovarian cancer risk (hazard ratio [HR]: 1.07 per 10-cm increase in height, 95% confidence interval [CI]: 0.94-1.23). Height-GS showed similar results (HR = 1.02, 95% CI: 0.85-1.23). Higher BMI was significantly associated with increased risk in premenopausal women with HR = 1.25 (95% CI: 1.06-1.48) and HR = 1.59 (95% CI: 1.08-2.33) per 5-kg/m2 increase in observed and genetically determined BMI, respectively. No association was found for postmenopausal women. Interaction between menopausal status and BMI was significant (Pinteraction < 0.05). CONCLUSION: Our observation of a positive association between BMI and ovarian cancer risk in premenopausal BRCA1/2 mutation carriers is consistent with findings in the general population.

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