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1. Physical activity, sedentary time and breast cancer risk: a Mendelian randomisation study

Author

Dixon-Suen, Suzanne C, Lewis, Sarah J, Martin, Richard M, English, Dallas R, Boyle, Terry, Giles, Graham G, Michailidou, Kyriaki, Bolla, Manjeet K, Wang, Qin, Dennis, Joe, Lush, Michael, Investigators, Abctb, Ahearn, Thomas U, Ambrosone, Christine B, Andrulis, Irene L, Anton-Culver, Hoda, Arndt, Volker, Aronson, Kristan J, Augustinsson, Annelie, Auvinen, Päivi, Beane Freeman, Laura E, Becher, Heiko, Beckmann, Matthias W, Behrens, Sabine, Bermisheva, Marina, Blomqvist, Carl, Bogdanova, Natalia V, Bojesen, Stig E, Bonanni, Bernardo, Brenner, Hermann, Brüning, Thomas, Buys, Saundra S, Camp, Nicola J, Campa, Daniele, Canzian, Federico, Castelao, Jose E, Cessna, Melissa H, Chang-Claude, Jenny, Chanock, Stephen J, Clarke, Christine L, Conroy, Don M, Couch, Fergus J, Cox, Angela, Cross, Simon S, Czene, Kamila, Daly, Mary B, Devilee, Peter, Dörk, Thilo, Dwek, Miriam, Eccles, Diana M, Eliassen, A Heather, Engel, Christoph, Eriksson, Mikael, Evans, D Gareth, Fasching, Peter A, Fletcher, Olivia, Flyger, Henrik, Fritschi, Lin, Gabrielson, Marike, Gago-Dominguez, Manuela, García-Closas, Montserrat, García-Sáenz, José A, Goldberg, Mark S, Guénel, Pascal, Gündert, Melanie, Hahnen, Eric, Haiman, Christopher A, Häberle, Lothar, Håkansson, Niclas, Hall, Per, Hamann, Ute, Hart, Steven N, Harvie, Michelle, Hillemanns, Peter, Hollestelle, Antoinette, Hooning, Maartje J, Hoppe, Reiner, Hopper, John, Howell, Anthony, Hunter, David J, Jakubowska, Anna, Janni, Wolfgang, John, Esther M, Jung, Audrey, Kaaks, Rudolf, Keeman, Renske, Kitahara, Cari M, Koutros, Stella, Kraft, Peter, Kristensen, Vessela N, Kubelka-Sabit, Katerina, Kurian, Allison W, Lacey, James V, Lambrechts, Diether, Le Marchand, Loic, Lindblom, Annika, Loibl, Sibylle, Lubiński, Jan, Mannermaa, Arto, Manoochehri, Mehdi, Margolin, Sara, Martinez, Maria Elena, Mavroudis, Dimitrios, Menon, Usha, Mulligan, Anna Marie, Murphy, Rachel A, Collaborators, Nbcs, Nevanlinna, Heli, Nevelsteen, Ines, Newman, William G, Offit, Kenneth, Olshan, Andrew F, Olsson, Håkan, Orr, Nick, Patel, Alpa, Peto, Julian, Plaseska-Karanfilska, Dijana, Presneau, Nadege, Rack, Brigitte, Radice, Paolo, Rees-Punia, Erika, Rennert, Gad, Rennert, Hedy S, Romero, Atocha, Saloustros, Emmanouil, Sandler, Dale P, Schmidt, Marjanka K, Schmutzler, Rita K, Schwentner, Lukas, Scott, Christopher, Shah, Mitul, Shu, Xiao-Ou, Simard, Jacques, Southey, Melissa C, Stone, Jennifer, Surowy, Harald, Swerdlow, Anthony J, Tamimi, Rulla M, Tapper, William J, Taylor, Jack A, Terry, Mary Beth, Tollenaar, Rob AEM, Troester, Melissa A, Truong, Thérèse, Untch, Michael, Vachon, Celine M, Joseph, Vijai, Wappenschmidt, Barbara, Weinberg, Clarice R, Wolk, Alicja, Yannoukakos, Drakoulis, Zheng, Wei, Ziogas, Argyrios, Dunning, Alison M, Pharoah, Paul DP, Easton, Douglas F, Milne, Roger L, Lynch, Brigid M, Breast Cancer Association Consortium, Law and Economics, Medical Oncology, Dixon-Suen, Suzanne C [0000-0003-3714-8386], Boyle, Terry [0000-0001-6741-330X], Romero, Atocha [0000-0002-1634-7397], Lynch, Brigid M [0000-0001-8060-547X], Apollo - University of Cambridge Repository, Dixon-Suen, Suzanne C, Lewis, Sarah J, Martin, Richard M, English, Dallas R, Boyle, Terry, Lynch, Brigid M, ABCTB Investigators, NBCS Collaborators, and Breast Canc Assoc Consortium

Subjects
Breast Neoplasms, Physical Therapy, Sports Therapy and Rehabilitation, Polymorphism, Single Nucleotide, Article, Basic medicine, breast cancer risk, SDG 3 - Good Health and Well-being, Risk Factors, sedentary behaviour, Genetics, Humans, Orthopedics and Sports Medicine, Breast, causal inference, Exercise, Manchester Cancer Research Centre, Physical activity, genetic variants, Breast Neoplasms/epidemiology, ResearchInstitutes_Networks_Beacons/mcrc, General Medicine, Mendelian Randomization Analysis, FOS: Biological sciences, Clinical medicine, instruments, physical inactivity, Sedentary Behaviour, Female, ICEP, Sedentary Behavior
Abstract

ObjectivesPhysical inactivity and sedentary behaviour are associated with higher breast cancer risk in observational studies, but ascribing causality is difficult. Mendelian randomisation (MR) assesses causality by simulating randomised trial groups using genotype. We assessed whether lifelong physical activity or sedentary time, assessed using genotype, may be causally associated with breast cancer risk overall, pre/post-menopause, and by case-groups defined by tumour characteristics.MethodsWe performed two-sample inverse-variance-weighted MR using individual-level Breast Cancer Association Consortium case-control data from 130 957 European-ancestry women (69 838 invasive cases), and published UK Biobank data (n=91 105–377 234). Genetic instruments were single nucleotide polymorphisms (SNPs) associated in UK Biobank with wrist-worn accelerometer-measured overall physical activity (nsnps=5) or sedentary time (nsnps=6), or accelerometer-measured (nsnps=1) or self-reported (nsnps=5) vigorous physical activity.ResultsGreater genetically-predicted overall activity was associated with lower breast cancer overall risk (OR=0.59; 95% confidence interval (CI) 0.42 to 0.83 per-standard deviation (SD;~8 milligravities acceleration)) and for most case-groups. Genetically-predicted vigorous activity was associated with lower risk of pre/perimenopausal breast cancer (OR=0.62; 95% CI 0.45 to 0.87,≥3 vs. 0 self-reported days/week), with consistent estimates for most case-groups. Greater genetically-predicted sedentary time was associated with higher hormone-receptor-negative tumour risk (OR=1.77; 95% CI 1.07 to 2.92 per-SD (~7% time spent sedentary)), with elevated estimates for most case-groups. Results were robust to sensitivity analyses examining pleiotropy (including weighted-median-MR, MR-Egger).ConclusionOur study provides strong evidence that greater overall physical activity, greater vigorous activity, and lower sedentary time are likely to reduce breast cancer risk. More widespread adoption of active lifestyles may reduce the burden from the most common cancer in women.

Published
2022

2. A comprehensive re-assessment of the association between vitamin D and cancer susceptibility using Mendelian randomization

Author

Ong, Jue-Sheng, Dixon-Suen, Suzanne C., Han, Xikun, An, Jiyuan, Liyanage, Upekha, Dusingize, Jean-Cluade, Schumacher, Johannes, Gockel, Ines, Böhmer, Anne, Jankowski, Janusz, Palles, Claire, O’Mara, Tracy, Spurdle, Amanda, Law, Matthew H., Iles, Mark M., Pharoah, Paul, Berchuck, Andrew, Zheng, Wei, Thrift, Aaron P., Olsen, Catherine, Neale, Rachel E., Gharahkhani, Puya, Webb, Penelope M., MacGregor, Stuart, Fitzgerald, Rebecca, Buas, Matt, Gammon, Marilie D., Corley, Douglas A., Shaheen, Nicholas J., Hardie, Laura J., Bird, Nigel C., Reid, Brian J., Chow, Wong-Ho, Risch, Harvey A., Ye, Weimin, Liu, Geoffrey, Romero, Yvonne, Bernstein, Leslie, Wu, Anna H., Whiteman, David E., Vaughan, Thomas, Agee, M., Alipanahi, B., Auton, A., Bell, R. K., Bryc, K., Elson, S. L., Fontanillas, P., Furlotte, N. A., Hinds, D. A., Huber, K. E., Kleinman, A., Litterman, N. K., McIntyre, M. H., Mountain, J. L., Noblin, E. S., Northover, C. A. M., Pitts, S. J., Sathirapongsasuti, J. Fah, Sazonova, O. V., Shelton, J. F., Shringarpure, S., Tian, C., Tung, J. Y., Vacic, V., Wilson, C. H., Ong, Jue-Sheng [0000-0002-6062-710X], Dixon-Suen, Suzanne C. [0000-0003-3714-8386], Han, Xikun [0000-0002-3823-7308], Gockel, Ines [0000-0001-7423-713X], Böhmer, Anne [0000-0002-5716-786X], O’Mara, Tracy [0000-0002-5436-3232], Spurdle, Amanda [0000-0003-1337-7897], Law, Matthew H. [0000-0002-4303-8821], Iles, Mark M. [0000-0002-2603-6509], Pharoah, Paul [0000-0001-8494-732X], Zheng, Wei [0000-0003-1226-070X], Thrift, Aaron P. [0000-0002-0084-5308], Olsen, Catherine [0000-0003-4483-1888], Gharahkhani, Puya [0000-0002-4203-5952], Webb, Penelope M. [0000-0003-0733-5930], MacGregor, Stuart [0000-0001-6731-8142], and Apollo - University of Cambridge Repository

Subjects
631/67/68, 45/43, article, 692/699/67/2195, 692/4028/67/2324
Abstract

Previous Mendelian randomization (MR) studies on 25-hydroxyvitamin D (25(OH)D) and cancer have typically adopted a handful of variants and found no relationship between 25(OH)D and cancer; however, issues of horizontal pleiotropy cannot be reliably addressed. Using a larger set of variants associated with 25(OH)D (74 SNPs, up from 6 previously), we perform a unified MR analysis to re-evaluate the relationship between 25(OH)D and ten cancers. Our findings are broadly consistent with previous MR studies indicating no relationship, apart from ovarian cancers (OR 0.89; 95% C.I: 0.82 to 0.96 per 1 SD change in 25(OH)D concentration) and basal cell carcinoma (OR 1.16; 95% C.I.: 1.04 to 1.28). However, after adjustment for pigmentation related variables in a multivariable MR framework, the BCC findings were attenuated. Here we report that lower 25(OH)D is unlikely to be a causal risk factor for most cancers, with our study providing more precise confidence intervals than previously possible.

Published
2021
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3. Adult height is associated with increased risk of ovarian cancer: a Mendelian randomisation study

Author

Dixon-Suen, Suzanne C, Nagle, Christina M, Thrift, Aaron P, Pharoah, Paul DP, Ewing, Ailith, Pearce, Celeste Leigh, Zheng, Wei, Australian Ovarian Cancer Study Group, Chenevix-Trench, Georgia, Fasching, Peter A, Beckmann, Matthias W, Lambrechts, Diether, Vergote, Ignace, Lambrechts, Sandrina, Van Nieuwenhuysen, Els, Rossing, Mary Anne, Doherty, Jennifer A, Wicklund, Kristine G, Chang-Claude, Jenny, Jung, Audrey Y, Moysich, Kirsten B, Odunsi, Kunle, Goodman, Marc T, Wilkens, Lynne R, Thompson, Pamela J, Shvetsov, Yurii B, Dörk, Thilo, Park-Simon, Tjoung-Won, Hillemanns, Peter, Bogdanova, Natalia, Butzow, Ralf, Nevanlinna, Heli, Pelttari, Liisa M, Leminen, Arto, Modugno, Francesmary, Ness, Roberta B, Edwards, Robert P, Kelley, Joseph L, Heitz, Florian, du Bois, Andreas, Harter, Philipp, Schwaab, Ira, Karlan, Beth Y, Lester, Jenny, Orsulic, Sandra, Rimel, Bobbie J, Kjær, Susanne K, Høgdall, Estrid, Jensen, Allan, Goode, Ellen L, Fridley, Brooke L, Cunningham, Julie M, Winham, Stacey J, Giles, Graham G, Bruinsma, Fiona, Milne, Roger L, Southey, Melissa C, Hildebrandt, Michelle AT, Wu, Xifeng, Lu, Karen H, Liang, Dong, Levine, Douglas A, Bisogna, Maria, Schildkraut, Joellen M, Berchuck, Andrew, Cramer, Daniel W, Terry, Kathryn L, Bandera, Elisa V, Olson, Sara H, Salvesen, Helga B, Thomsen, Liv Cecilie Vestrheim, Kopperud, Reidun K, Bjorge, Line, Kiemeney, Lambertus A, Massuger, Leon FAG, Pejovic, Tanja, Bruegl, Amanda, Cook, Linda S, Le, Nhu D, Swenerton, Kenneth D, Brooks-Wilson, Angela, Kelemen, Linda E, Lubiński, Jan, Huzarski, Tomasz, Gronwald, Jacek, Menkiszak, Janusz, Wentzensen, Nicolas, Brinton, Louise, Yang, Hannah, Lissowska, Jolanta, Høgdall, Claus K, Lundvall, Lene, Song, Honglin, Tyrer, Jonathan P, Campbell, Ian, Eccles, Diana, Paul, James, Glasspool, Rosalind, Siddiqui, Nadeem, Whittemore, Alice S, Sieh, Weiva, McGuire, Valerie, Rothstein, Joseph H, Narod, Steven A, Phelan, Catherine, Risch, Harvey A, McLaughlin, John R, Anton-Culver, Hoda, Ziogas, Argyrios, Menon, Usha, Gayther, Simon A, Ramus, Susan J, Gentry-Maharaj, Aleksandra, Wu, Anna H, Pike, Malcolm C, Tseng, Chiu-Chen, Kupryjanczyk, Jolanta, Dansonka-Mieszkowska, Agnieszka, Budzilowska, Agnieszka, Rzepecka, Iwona K, Webb, Penelope M, Ovarian Cancer Association Consortium, Dixon-Suen, Suzanne C [0000-0003-3714-8386], Zheng, Wei [0000-0003-1226-070X], Brinton, Louise [0000-0003-3853-8562], Glasspool, Rosalind [0000-0002-5000-1680], and Apollo - University of Cambridge Repository

Subjects
Adult, Aged, 80 and over, Ovarian Neoplasms, Adolescent, Geography, Carcinoma, Ovarian Epithelial, Mendelian Randomization Analysis, Middle Aged, Body Height, Young Adult, Risk Factors, Case-Control Studies, Humans, Female, Genetic Predisposition to Disease, Aged
Abstract

BACKGROUND: Observational studies suggest greater height is associated with increased ovarian cancer risk, but cannot exclude bias and/or confounding as explanations for this. Mendelian randomisation (MR) can provide evidence which may be less prone to bias. METHODS: We pooled data from 39 Ovarian Cancer Association Consortium studies (16,395 cases; 23,003 controls). We applied two-stage predictor-substitution MR, using a weighted genetic risk score combining 609 single-nucleotide polymorphisms. Study-specific odds ratios (OR) and 95% confidence intervals (CI) for the association between genetically predicted height and risk were pooled using random-effects meta-analysis. RESULTS: Greater genetically predicted height was associated with increased ovarian cancer risk overall (pooled-OR (pOR) = 1.06; 95% CI: 1.01-1.11 per 5 cm increase in height), and separately for invasive (pOR = 1.06; 95% CI: 1.01-1.11) and borderline (pOR = 1.15; 95% CI: 1.02-1.29) tumours. CONCLUSIONS: Women with a genetic propensity to being taller have increased risk of ovarian cancer. This suggests genes influencing height are involved in pathways promoting ovarian carcinogenesis.

Published
2018

4. Adult height is associated with increased risk of ovarian cancer: a Mendelian randomisation study

Author

Dixon-Suen, Suzanne C, Nagle, Christina M, Thrift, Aaron P, Pharoah, Paul DP, Ewing, Ailith, Pearce, Celeste Leigh, Zheng, Wei, Australian Ovarian Cancer Study Group, Chenevix-Trench, Georgia, Fasching, Peter A, Beckmann, Matthias W, Lambrechts, Diether, Vergote, Ignace, Lambrechts, Sandrina, Van Nieuwenhuysen, Els, Rossing, Mary Anne, Doherty, Jennifer A, Wicklund, Kristine G, Chang-Claude, Jenny, Jung, Audrey Y, Moysich, Kirsten B, Odunsi, Kunle, Goodman, Marc T, Wilkens, Lynne R, Thompson, Pamela J, Shvetsov, Yurii B, Dörk, Thilo, Park-Simon, Tjoung-Won, Hillemanns, Peter, Bogdanova, Natalia, Butzow, Ralf, Nevanlinna, Heli, Pelttari, Liisa M, Leminen, Arto, Modugno, Francesmary, Ness, Roberta B, Edwards, Robert P, Kelley, Joseph L, Heitz, Florian, du Bois, Andreas, Harter, Philipp, Schwaab, Ira, Karlan, Beth Y, Lester, Jenny, Orsulic, Sandra, Rimel, Bobbie J, Kjær, Susanne K, Høgdall, Estrid, Jensen, Allan, Goode, Ellen L, Fridley, Brooke L, Cunningham, Julie M, Winham, Stacey J, Giles, Graham G, Bruinsma, Fiona, Milne, Roger L, Southey, Melissa C, Hildebrandt, Michelle AT, Wu, Xifeng, Lu, Karen H, Liang, Dong, Levine, Douglas A, Bisogna, Maria, Schildkraut, Joellen M, Berchuck, Andrew, Cramer, Daniel W, Terry, Kathryn L, Bandera, Elisa V, Olson, Sara H, Salvesen, Helga B, Thomsen, Liv Cecilie Vestrheim, Kopperud, Reidun K, Bjorge, Line, Kiemeney, Lambertus A, Massuger, Leon FAG, Pejovic, Tanja, Bruegl, Amanda, Cook, Linda S, Le, Nhu D, Swenerton, Kenneth D, Brooks-Wilson, Angela, Kelemen, Linda E, Lubiński, Jan, Huzarski, Tomasz, Gronwald, Jacek, Menkiszak, Janusz, Wentzensen, Nicolas, Brinton, Louise, Yang, Hannah, Lissowska, Jolanta, Høgdall, Claus K, Lundvall, Lene, Song, Honglin, Tyrer, Jonathan P, Campbell, Ian, Eccles, Diana, Paul, James, Glasspool, Rosalind, Siddiqui, Nadeem, and Whittemore, Alice S

Subjects
Australian Ovarian Cancer Study Group, Adult, Adolescent, Ovarian Cancer Association Consortium, Oncology and Carcinogenesis, Young Adult, Rare Diseases, Risk Factors, Clinical Research, Ovarian Epithelial, 80 and over, Genetics, Humans, Genetic Predisposition to Disease, Oncology & Carcinogenesis, Aged, Cancer, Ovarian Neoplasms, Geography, Carcinoma, Middle Aged, Mendelian Randomization Analysis, Body Height, Ovarian Cancer, Case-Control Studies, Public Health and Health Services, Female
Abstract

BackgroundObservational studies suggest greater height is associated with increased ovarian cancer risk, but cannot exclude bias and/or confounding as explanations for this. Mendelian randomisation (MR) can provide evidence which may be less prone to bias.MethodsWe pooled data from 39 Ovarian Cancer Association Consortium studies (16,395 cases; 23,003 controls). We applied two-stage predictor-substitution MR, using a weighted geneticrisk score combining 609 single-nucleotide polymorphisms. Study-specific odds ratios (OR) and 95% confidence intervals (CI) for the association between genetically predicted height and risk were pooled using random-effects meta-analysis.ResultsGreater genetically predicted height was associated with increased ovarian cancer risk overall (pooled-OR (pOR) = 1.06; 95% CI: 1.01-1.11 per 5 cm increase in height), and separately for invasive (pOR = 1.06; 95% CI: 1.01-1.11) and borderline (pOR = 1.15; 95% CI: 1.02-1.29) tumours.ConclusionsWomen with a genetic propensity to being taller have increased risk of ovarian cancer. This suggests genes influencing height are involved in pathways promoting ovarian carcinogenesis.

Published
2018

5. Adult height is associated with increased risk of ovarian cancer: a Mendelian randomisation study

Author

Dixon-Suen, Suzanne C, Nagle, Christina M, Thrift, Aaron P, Pharoah, Paul DP, Ewing, Ailith, Pearce, Celeste Leigh, Zheng, Wei, Australian Ovarian Cancer Study Group, Chenevix-Trench, Georgia, Fasching, Peter A, Beckmann, Matthias W, Lambrechts, Diether, Vergote, Ignace, Lambrechts, Sandrina, Van Nieuwenhuysen, Els, Rossing, Mary Anne, Doherty, Jennifer A, Wicklund, Kristine G, Chang-Claude, Jenny, Jung, Audrey Y, Moysich, Kirsten B, Odunsi, Kunle, Goodman, Marc T, Wilkens, Lynne R, Thompson, Pamela J, Shvetsov, Yurii B, Dörk, Thilo, Park-Simon, Tjoung-Won, Hillemanns, Peter, Bogdanova, Natalia, Butzow, Ralf, Nevanlinna, Heli, Pelttari, Liisa M, Leminen, Arto, Modugno, Francesmary, Ness, Roberta B, Edwards, Robert P, Kelley, Joseph L, Heitz, Florian, Du Bois, Andreas, Harter, Philipp, Schwaab, Ira, Karlan, Beth Y, Lester, Jenny, Orsulic, Sandra, Rimel, Bobbie J, Kjær, Susanne K, Høgdall, Estrid, Jensen, Allan, Goode, Ellen L, Fridley, Brooke L, Cunningham, Julie M, Winham, Stacey J, Giles, Graham G, Bruinsma, Fiona, Milne, Roger L, Southey, Melissa C, Hildebrandt, Michelle AT, Wu, Xifeng, Lu, Karen H, Liang, Dong, Levine, Douglas A, Bisogna, Maria, Schildkraut, Joellen M, Berchuck, Andrew, Cramer, Daniel W, Terry, Kathryn L, Bandera, Elisa V, Olson, Sara H, Salvesen, Helga B, Thomsen, Liv Cecilie Vestrheim, Kopperud, Reidun K, Bjorge, Line, Kiemeney, Lambertus A, Massuger, Leon FAG, Pejovic, Tanja, Bruegl, Amanda, Cook, Linda S, Le, Nhu D, Swenerton, Kenneth D, Brooks-Wilson, Angela, Kelemen, Linda E, Lubiński, Jan, Huzarski, Tomasz, Gronwald, Jacek, Menkiszak, Janusz, Wentzensen, Nicolas, Brinton, Louise, Yang, Hannah, Lissowska, Jolanta, Høgdall, Claus K, Lundvall, Lene, Song, Honglin, Tyrer, Jonathan P, Campbell, Ian, Eccles, Diana, Paul, James, Glasspool, Rosalind, Siddiqui, Nadeem, Whittemore, Alice S, Sieh, Weiva, McGuire, Valerie, Rothstein, Joseph H, Narod, Steven A, Phelan, Catherine, Risch, Harvey A, McLaughlin, John R, Anton-Culver, Hoda, Ziogas, Argyrios, Menon, Usha, Gayther, Simon A, Ramus, Susan J, Gentry-Maharaj, Aleksandra, Wu, Anna H, Pike, Malcolm C, Tseng, Chiu-Chen, Kupryjanczyk, Jolanta, Dansonka-Mieszkowska, Agnieszka, Budzilowska, Agnieszka, Rzepecka, Iwona K, Webb, Penelope M, and Ovarian Cancer Association Consortium

Subjects
Adult, Aged, 80 and over, Ovarian Neoplasms, Adolescent, Geography, Carcinoma, Ovarian Epithelial, Mendelian Randomization Analysis, Middle Aged, Body Height, 3. Good health, Young Adult, Risk Factors, Case-Control Studies, Humans, Female, Genetic Predisposition to Disease, Aged
Abstract

BACKGROUND: Observational studies suggest greater height is associated with increased ovarian cancer risk, but cannot exclude bias and/or confounding as explanations for this. Mendelian randomisation (MR) can provide evidence which may be less prone to bias. METHODS: We pooled data from 39 Ovarian Cancer Association Consortium studies (16,395 cases; 23,003 controls). We applied two-stage predictor-substitution MR, using a weighted genetic risk score combining 609 single-nucleotide polymorphisms. Study-specific odds ratios (OR) and 95% confidence intervals (CI) for the association between genetically predicted height and risk were pooled using random-effects meta-analysis. RESULTS: Greater genetically predicted height was associated with increased ovarian cancer risk overall (pooled-OR (pOR) = 1.06; 95% CI: 1.01-1.11 per 5 cm increase in height), and separately for invasive (pOR = 1.06; 95% CI: 1.01-1.11) and borderline (pOR = 1.15; 95% CI: 1.02-1.29) tumours. CONCLUSIONS: Women with a genetic propensity to being taller have increased risk of ovarian cancer. This suggests genes influencing height are involved in pathways promoting ovarian carcinogenesis.

6. A comprehensive re-assessment of the association between vitamin D and cancer susceptibility using Mendelian randomization

Author

Upekha E Liyanage, Amanda B. Spurdle, K. E. Huber, Anna H. Wu, J. Fah Sathirapongsasuti, Douglas A. Corley, C. Tian, Anne Böhmer, David A. Hinds, A. Auton, Xikun Han, Matt Buas, M. Agee, Rebecca C. Fitzgerald, Puya Gharahkhani, Yvonne Romero, S. L. Elson, Ines Gockel, Johannes Schumacher, Leslie Bernstein, Nigel C. Bird, Thomas L. Vaughan, E. S. Noblin, P. Fontanillas, Laura J. Hardie, Brian J. Reid, V. Vacic, M. H. McIntyre, Jiyuan An, Andrew Berchuck, Claire Palles, Weimin Ye, K. Bryc, S. J. Pitts, Jue-Sheng Ong, Geoffrey Liu, R. K. Bell, Rachel E. Neale, Marilie D. Gammon, J. L. Mountain, C. A. M. Northover, Catherine M. Olsen, C. H. Wilson, Janusz Jankowski, Matthew Law, A. Kleinman, Suzanne C. Dixon-Suen, J. Y. Tung, Aaron P. Thrift, Wong-Ho Chow, Paul Pharoah, Jean-Cluade Dusingize, Suyash Shringarpure, Mark M. Iles, Wei Zheng, N. A. Furlotte, Penelope M. Webb, B. Alipanahi, O. V. Sazonova, Stuart MacGregor, David Whiteman, J. F. Shelton, Harvey A. Risch, N. K. Litterman, Tracy A. O'Mara, Nicholas J. Shaheen, Ong, Jue-Sheng [0000-0002-6062-710X], Dixon-Suen, Suzanne C [0000-0003-3714-8386], Han, Xikun [0000-0002-3823-7308], Gockel, Ines [0000-0001-7423-713X], Böhmer, Anne [0000-0002-5716-786X], O'Mara, Tracy [0000-0002-5436-3232], Spurdle, Amanda [0000-0003-1337-7897], Law, Matthew H [0000-0002-4303-8821], Iles, Mark M [0000-0002-2603-6509], Pharoah, Paul [0000-0001-8494-732X], Zheng, Wei [0000-0003-1226-070X], Thrift, Aaron P [0000-0002-0084-5308], Olsen, Catherine [0000-0003-4483-1888], Gharahkhani, Puya [0000-0002-4203-5952], Webb, Penelope M [0000-0003-0733-5930], MacGregor, Stuart [0000-0001-6731-8142], and Apollo - University of Cambridge Repository

Subjects
0301 basic medicine, Oncology, medicine.medical_specialty, Science, General Physics and Astronomy, Sunburn, Single-nucleotide polymorphism, General Biochemistry, Genetics and Molecular Biology, Article, Cancer prevention, 03 medical and health sciences, 0302 clinical medicine, Cancer epidemiology, Risk Factors, Internal medicine, Neoplasms, Mendelian randomization, Vitamin D and neurology, medicine, Humans, Genetic Predisposition to Disease, 030212 general & internal medicine, Risk factor, Vitamin D, Child, Cancer genetics, Multidisciplinary, business.industry, Pigmentation, Case-control study, Cancer, Mendelian Randomization Analysis, General Chemistry, medicine.disease, Confidence interval, 030104 developmental biology, Case-Control Studies, Multivariate Analysis, business
Abstract

Previous Mendelian randomization (MR) studies on 25-hydroxyvitamin D (25(OH)D) and cancer have typically adopted a handful of variants and found no relationship between 25(OH)D and cancer; however, issues of horizontal pleiotropy cannot be reliably addressed. Using a larger set of variants associated with 25(OH)D (74 SNPs, up from 6 previously), we perform a unified MR analysis to re-evaluate the relationship between 25(OH)D and ten cancers. Our findings are broadly consistent with previous MR studies indicating no relationship, apart from ovarian cancers (OR 0.89; 95% C.I: 0.82 to 0.96 per 1 SD change in 25(OH)D concentration) and basal cell carcinoma (OR 1.16; 95% C.I.: 1.04 to 1.28). However, after adjustment for pigmentation related variables in a multivariable MR framework, the BCC findings were attenuated. Here we report that lower 25(OH)D is unlikely to be a causal risk factor for most cancers, with our study providing more precise confidence intervals than previously possible., Studies of the genetic association between vitamin D and cancer risk have typically been underpowered. Here the authors analyse this using Mendelian Randomisation with more than 70 vitamin D variants obtained from the UK Biobank and large-scale data from various consortia, confirming null associations between vitamin D and most cancers.

Published
2020

7. Approaches to Improve Causal Inference in Physical Activity Epidemiology

Author

Brigid M. Lynch, Suzanne C. Dixon-Suen, Ding Ding, Dallas R. English, Yi Yang, Andrea Ramirez Varela, Paula Gardiner, Terry Boyle, Lynch, Brigid M, Dixon-Suen, Suzanne C, Varela, Andrea Ramirez, Yang, Yi, English, Dallas R, Ding, Ding, Gardiner, Paul A, and Boyle, Terry

Subjects
Confounding, biostatistics, 030229 sport sciences, Epidemiological method, methods, law.invention, 03 medical and health sciences, 0302 clinical medicine, Randomized controlled trial, Bias, law, potential outcomes approach, Causal inference, Mendelian randomization, Propensity score matching, Humans, Orthopedics and Sports Medicine, Observational study, 030212 general & internal medicine, causal inference, Biostatistics, Psychology, Exercise, Cognitive psychology
Abstract

Background: It is not always clear whether physical activity is causally related to health outcomes, or whether the associations are induced through confounding or other biases. Randomized controlled trials of physical activity are not feasible when outcomes of interest are rare or develop over many years. Thus, we need methods to improve causal inference in observational physical activity studies. Methods: We outline a range of approaches that can improve causal inference in observational physical activity research, and also discuss the impact of measurement error on results and methods to minimize this. Results: Key concepts and methods described include directed acyclic graphs, quantitative bias analysis, Mendelian randomization, and potential outcomes approaches which include propensity scores, g methods, and causal mediation. Conclusions: We provide a brief overview of some contemporary epidemiological methods that are beginning to be used in physical activity research. Adoption of these methods will help build a stronger body of evidence for the health benefits of physical activity.

Published
2019

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