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Start Over Author "Ardau, R" Publisher cambridge university press
4 results on '"Ardau, R"'

1. Influence of birth cohort on age of onset cluster analysis in bipolar I disorder.

Author

Bauer, M., Glenn, T., Alda, M., Andreassen, O.A., Angelopoulos, E., Ardau, R., Baethge, C., Bauer, R., Bellivier, F., Belmaker, R.H., Berk, M., Bjella, T.D., Bossini, L., Bersudsky, Y., Cheung, E.Y.W., Conell, J., Del Zompo, M., Dodd, S., Etain, B., and Fagiolini, A.

Subjects
*BIPOLAR disorder, *ACQUISITION of data, *MEDICAL databases, *CLUSTER analysis (Statistics), *ESTIMATION theory, *PATIENTS
Abstract

Purpose Two common approaches to identify subgroups of patients with bipolar disorder are clustering methodology (mixture analysis) based on the age of onset, and a birth cohort analysis. This study investigates if a birth cohort effect will influence the results of clustering on the age of onset, using a large, international database. Methods The database includes 4037 patients with a diagnosis of bipolar I disorder, previously collected at 36 collection sites in 23 countries. Generalized estimating equations (GEE) were used to adjust the data for country median age, and in some models, birth cohort. Model-based clustering (mixture analysis) was then performed on the age of onset data using the residuals. Clinical variables in subgroups were compared. Results There was a strong birth cohort effect. Without adjusting for the birth cohort, three subgroups were found by clustering. After adjusting for the birth cohort or when considering only those born after 1959, two subgroups were found. With results of either two or three subgroups, the youngest subgroup was more likely to have a family history of mood disorders and a first episode with depressed polarity. However, without adjusting for birth cohort (three subgroups), family history and polarity of the first episode could not be distinguished between the middle and oldest subgroups. Conclusion These results using international data confirm prior findings using single country data, that there are subgroups of bipolar I disorder based on the age of onset, and that there is a birth cohort effect. Including the birth cohort adjustment altered the number and characteristics of subgroups detected when clustering by age of onset. Further investigation is needed to determine if combining both approaches will identify subgroups that are more useful for research. [ABSTRACT FROM AUTHOR]

Published
2015
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2. Characterisation of age and polarity at onset in bipolar disorder

Author

Kalman, Janos, Olde Loohuis, Loes, Vreeker, Annabel, Mcquillin, Andrew, Stahl, Eli, Ruderfer, Douglas, Grigoroiu-Serbanescu, Maria, Panagiotaropoulou, Georgia, Ripke, Stephan, Bigdeli, Tim, Stein, Frederike, Meller, Tina, Meinert, Susanne, Pelin, Helena, Streit, Fabian, Papiol, Sergi, Adams, Mark, Adolfsson, Rolf, Adorjan, Kristina, Agartz, Ingrid, Aminoff, Sofie, Anderson-Schmidt, Heike, Andreassen, Ole, Ardau, Raffaella, Aubry, Jean-Michel, Balaban, Ceylan, Bass, Nicholas, Baune, Bernhard, Bellivier, Frank, Benabarre, Antoni, Bengesser, Susanne, Berrettini, Wade, Boks, Marco, Bromet, Evelyn, Brosch, Katharina, Budde, Monika, Byerley, William, Cervantes, Pablo, Chillotti, Catina, Cichon, Sven, Clark, Scott, Comes, Ashley, Corvin, Aiden, Coryell, William, Craddock, Nick, Craig, David, Croarkin, Paul, Cruceanu, Cristiana, Czerski, Piotr, Dalkner, Nina, Dannlowski, Udo, Degenhardt, Franziska, del Zompo, Maria, Depaulo, J Raymond, Djurovic, Srdjan, Edenberg, Howard, Eissa, Mariam Al, Elvsåshagen, Torbjørn, Etain, Bruno, Fanous, Ayman, Fellendorf, Frederike, Fiorentino, Alessia, Forstner, Andreas, Frye, Mark, Fullerton, Janice, Gade, Katrin, Garnham, Julie, Gershon, Elliot, Gill, Michael, Goes, Fernando, Gordon-Smith, Katherine, Grof, Paul, Guzman-Parra, Jose, Hahn, Tim, Hasler, Roland, Heilbronner, Maria, Heilbronner, Urs, Jamain, Stephane, Jimenez, Esther, Jones, Ian, Jones, Lisa, Jonsson, Lina, Kahn, Rene, Kelsoe, John, Kennedy, James, Kircher, Tilo, Kirov, George, Kittel-Schneider, Sarah, Klöhn-Saghatolislam, Farah, Knowles, James, Kranz, Thorsten, Lagerberg, Trine Vik, Landen, Mikael, Lawson, William, Leboyer, Marion, Li, Qingqin, Maj, Mario, Malaspina, Dolores, Manchia, Mirko, Mayoral, Fermin, Mcelroy, Susan, Mcinnis, Melvin, McIntosh, Andrew, Medeiros, Helena, Melle, Ingrid, Milanova, Vihra, Mitchell, Philip, Monteleone, Palmiero, Monteleone, Alessio Maria, Nöthen, Markus, Novak, Tomas, Nurnberger, John, O'Brien, Niamh, O'Connell, Kevin, O'Donovan, Claire, O'Donovan, Michael, Opel, Nils, Ortiz, Abigail, Owen, Michael, Pålsson, Erik, Pato, Carlos, Pato, Michele, Pawlak, Joanna, Pfarr, Julia-Katharina, Pisanu, Claudia, Potash, James, Rapaport, Mark, Reich-Erkelenz, Daniela, Reif, Andreas, Reininghaus, Eva, Repple, Jonathan, Richard-Lepouriel, Hélène, Rietschel, Marcella, Ringwald, Kai, Roberts, Gloria, Rouleau, Guy, Schaupp, Sabrina, Scheftner, William, Schmitt, Simon, Schofield, Peter, Schubert, K Oliver, Schulte, Eva, Schweizer, Barbara, Senner, Fanny, Severino, Giovanni, Sharp, Sally, Slaney, Claire, Smeland, Olav, Sobell, Janet, Squassina, Alessio, Stopkova, Pavla, Strauss, John, Tortorella, Alfonso, Turecki, Gustavo, Twarowska-Hauser, Joanna, Veldic, Marin, Vieta, Eduard, Vincent, John, Xu, Wei, Zai, Clement, Zandi, Peter, Di Florio, Arianna, Smoller, Jordan, Biernacka, Joanna, Mcmahon, Francis, Alda, Martin, Müller-Myhsok, Bertram, Koutsouleris, Nikolaos, Falkai, Peter, Freimer, Nelson, Andlauer, Till, Schulze, Thomas, Ophoff, Roel, Depaulo, J. Raymond, Schubert, K. Oliver, Andlauer, Till F.M., Optimisation thérapeutique en Neuropsychopharmacologie (OPTeN (UMR_S_1144 / U1144)), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Cité (UPCité), Hôpital Lariboisière-Fernand-Widal [APHP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), IMRB - 'Neuropsychiatrie translationnelle' [Créteil] (U955 Inserm - UPEC), Institut Mondor de Recherche Biomédicale (IMRB), Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR10-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR10-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Etain, Bruno, Child and Adolescent Psychiatry / Psychology, Psychiatry, Kalman, J. L., Loohuis, L. M. O., Vreeker, A., Mcquillin, A., Stahl, E. A., Ruderfer, D., Grigoroiu-Serbanescu, M., Panagiotaropoulou, G., Ripke, S., Bigdeli, T. B., Stein, F., Meller, T., Meinert, S., Pelin, H., Streit, F., Papiol, S., Adams, M. J., Adolfsson, R., Adorjan, K., Agartz, I., Aminoff, S. R., Anderson-Schmidt, H., Andreassen, O. A., Ardau, R., Aubry, J. -M., Balaban, C., Bass, N., Baune, B. T., Bellivier, F., Benabarre, A., Bengesser, S., Berrettini, W. H., Boks, M. P., Bromet, E. J., Brosch, K., Budde, M., Byerley, W., Cervantes, P., Chillotti, C., Cichon, S., Clark, S. R., Comes, A. L., Corvin, A., Coryell, W., Craddock, N., Craig, D. W., Croarkin, P. E., Cruceanu, C., Czerski, P. M., Dalkner, N., Dannlowski, U., Degenhardt, F., Del Zompo, M., Depaulo, J. R., Djurovic, S., Edenberg, H. J., Al Eissa, M., Elvsashagen, T., Etain, B., Fanous, A. H., Fellendorf, F., Fiorentino, A., Forstner, A. J., Frye, M. A., Fullerton, J. M., Gade, K., Garnham, J., Gershon, E., Gill, M., Goes, F. S., Gordon-Smith, K., Grof, P., Guzman-Parra, J., Hahn, T., Hasler, R., Heilbronner, M., Heilbronner, U., Jamain, S., Jimenez, E., Jones, I., Jones, L., Jonsson, L., Kahn, R. S., Kelsoe, J. R., Kennedy, J. L., Kircher, T., Kirov, G., Kittel-Schneider, S., Klohn-Saghatolislam, F., Knowles, J. A., Kranz, T. M., Lagerberg, T. V., Landen, M., Lawson, W. B., Leboyer, M., Li, Q. S., Maj, M., Malaspina, D., Manchia, M., Mayoral, F., Mcelroy, S. L., Mcinnis, M. G., Mcintosh, A. M., Medeiros, H., Melle, I., Milanova, V., Mitchell, P. B., Monteleone, P., Monteleone, A. M., Nothen, M. M., Novak, T., Nurnberger, J. I., O'Brien, N., O'Connell, K. S., O'Donovan, C., O'Donovan, M. C., Opel, N., Ortiz, A., Owen, M. J., Palsson, E., Pato, C., Pato, M. T., Pawlak, J., Pfarr, J. -K., Pisanu, C., Potash, J. B., Rapaport, M. H., Reich-Erkelenz, D., Reif, A., Reininghaus, E., Repple, J., Richard-Lepouriel, H., Rietschel, M., Ringwald, K., Roberts, G., Rouleau, G., Schaupp, S., Scheftner, W. A., Schmitt, S., Schofield, P. R., Schubert, K. O., Schulte, E. C., Schweizer, B., Senner, F., Severino, G., Sharp, S., Slaney, C., Smeland, O. B., Sobell, J. L., Squassina, A., Stopkova, P., Strauss, J., Tortorella, A., Turecki, G., Twarowska-Hauser, J., Veldic, M., Vieta, E., Vincent, J. B., Xu, W., Zai, C. C., Zandi, P. P., Di Florio, A., Smoller, J. W., Biernacka, J. M., Mcmahon, F. J., Alda, M., Muller-Myhsok, B., Koutsouleris, N., Falkai, P., Freimer, N. B., Andlauer, T. F. M., Schulze, T. G., and Ophoff, R. A.

Subjects
Paper, Multifactorial Inheritance, medicine.medical_specialty, Autism Spectrum Disorder, Bipolar disorder, MESH: Age of Onset, [SDV.MHEP.PSM] Life Sciences [q-bio]/Human health and pathology/Psychiatrics and mental health, Medizin, GWAS, age at onset, polarity at onset, polygenic score, MESH: Depressive Disorder, Major, BF, Genome-wide association study, Disease, Psykiatri, SDG 3 - Good Health and Well-being, ddc:150, Polarity at onset, Internal medicine, MESH: Bipolar Disorder, Polygenic score, medicine, Humans, Academic Psychiatry, Age of Onset, Genetic association, Psychiatry, MESH: Autism Spectrum Disorder, Depressive Disorder, Major, MESH: Humans, business.industry, Age at onset, Heritability, medicine.disease, Genetic architecture, ddc, Psychiatry and Mental health, Schizophrenia, Autism spectrum disorder, [SDV.MHEP.PSM]Life Sciences [q-bio]/Human health and pathology/Psychiatrics and mental health, MESH: Genome-Wide Association Study, RC0321, MESH: Multifactorial Inheritance, business, Genome-Wide Association Study
Abstract

BackgroundStudying phenotypic and genetic characteristics of age at onset (AAO) and polarity at onset (PAO) in bipolar disorder can provide new insights into disease pathology and facilitate the development of screening tools.AimsTo examine the genetic architecture of AAO and PAO and their association with bipolar disorder disease characteristics.MethodGenome-wide association studies (GWASs) and polygenic score (PGS) analyses of AAO (n = 12 977) and PAO (n = 6773) were conducted in patients with bipolar disorder from 34 cohorts and a replication sample (n = 2237). The association of onset with disease characteristics was investigated in two of these cohorts.ResultsEarlier AAO was associated with a higher probability of psychotic symptoms, suicidality, lower educational attainment, not living together and fewer episodes. Depressive onset correlated with suicidality and manic onset correlated with delusions and manic episodes. Systematic differences in AAO between cohorts and continents of origin were observed. This was also reflected in single-nucleotide variant-based heritability estimates, with higher heritabilities for stricter onset definitions. Increased PGS for autism spectrum disorder (β = −0.34 years, s.e. = 0.08), major depression (β = −0.34 years, s.e. = 0.08), schizophrenia (β = −0.39 years, s.e. = 0.08), and educational attainment (β = −0.31 years, s.e. = 0.08) were associated with an earlier AAO. The AAO GWAS identified one significant locus, but this finding did not replicate. Neither GWAS nor PGS analyses yielded significant associations with PAO.ConclusionsAAO and PAO are associated with indicators of bipolar disorder severity. Individuals with an earlier onset show an increased polygenic liability for a broad spectrum of psychiatric traits. Systematic differences in AAO across cohorts, continents and phenotype definitions introduce significant heterogeneity, affecting analyses.

Published
2021
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3. Age at onset in bipolar disorder: Investigation of the role of TaqIA polymorphism of DRD2 gene in a Sardinian sample

Author

Squassina, A., Manchia, M., Costa, M., Chillotti, C., Ardau, R., Del Zompo, M., and Severino, G.

Subjects
*GENETICS of bipolar disorder, *AGE of onset, *GENETIC polymorphisms, *PHENOTYPES, *GENES, *LOCUS (Genetics)
Abstract

Abstract: Bipolar disorder (BD) is a highly heterogeneous and heritable psychiatric illness. Age at onset has been shown to be a powerful tool for dissecting both the phenotypic and genetic complexity of BD. In this article, we present findings from an association study between the DRD2 TaqIA polymorphism and age at onset, showing that both alleles and genotypes at this locus associate with early onset BD. [Copyright &y& Elsevier]

Published
2011
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4. Using polygenic scores and clinical data for bipolar disorder patient stratification and lithium response prediction: machine learning approach - CORRIGENDUM.

Author

Cearns M, Amare AT, Schubert KO, Thalamuthu A, Frank J, Streit F, Adli M, Akula N, Akiyama K, Ardau R, Arias B, Aubry J, Backlund L, Bhattacharjee AK, Bellivier F, Benabarre A, Bengesser S, Biernacka JM, Birner A, Brichant-Petitjean C, Cervantes P, Chen H, Chillotti C, Cichon S, Cruceanu C, Czerski PM, Dalkner N, Dayer A, Degenhardt F, Zompo MD, DePaulo JR, Étain B, Falkai P, Forstner AJ, Frisen L, Frye MA, Fullerton JM, Gard S, Garnham JS, Goes FS, Grigoroiu-Serbanescu M, Grof P, Hashimoto R, Hauser J, Heilbronner U, Herms S, Hoffmann P, Hofmann A, Hou L, Hsu YH, Jamain S, Jiménez E, Kahn JP, Kassem L, Kuo PH, Kato T, Kelsoe J, Kittel-Schneider S, Kliwicki S, König B, Kusumi I, Laje G, Landén M, Lavebratt C, Leboyer M, Leckband SG, Maj M, Manchia M, Martinsson L, McCarthy MJ, McElroy S, Colom F, Mitjans M, Mondimore FM, Monteleone P, Nievergelt CM, Nöthen MM, Novák T, O'Donovan C, Ozaki N, Millischer V, Papiol S, Pfennig A, Pisanu C, Potash JB, Reif A, Reininghaus E, Rouleau GA, Rybakowski JK, Schalling M, Schofield PR, Schweizer BW, Severino G, Shekhtman T, Shilling PD, Shimoda K, Simhandl C, Slaney CM, Squassina A, Stamm T, Stopkova P, TekolaAyele F, Tortorella A, Turecki G, Veeh J, Vieta E, Witt SH, Roberts G, Zandi PP, Alda M, Bauer M, McMahon FJ, Mitchell PB, Schulze TG, Rietschel M, Clark SR, and Baune BT

Published
2022
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