The GCCR recognizes 3 types of projects. Note that the boundaries are not absolute and some projects may have some aspects that fit with other types of projects. 1. **GCCR consortium project** - *consortium-wide data collection and publication* 2. **Existing data study (EDS)** - *uses data previously collected by GCCR, generally resulting in a publication by a smaller project team* 3. **New data study (NDS)** - *proposes to collect data with GCCR* To propose a project, please read our [**Study Proposals wiki**][1]. ---------- Currently the GCCR has the following projects: **GCCR001** ----------- - **"More than smell. COVID-19 is associated with severe impairment of smell, taste, and chemesthesis."** - Development, implementation, and initial results of a multilingual, international questionnaire to assess self-reported quantity and quality of perception in 3 distinct chemosensory modalities (smell, taste, and chemesthesis) before and during COVID-19. - **Data collection tool:** [COVID-19 retrospective questionnaire][2] - **Data tranche used:** 18 April 2020 - [GCCR001 Data repository][3] - [GCCR001 Research compendium][4] - [GCCR001 Pre-registration][5] - [GCCR001 Preprint on medRXiv][6] - [GCCR001 Publication in Chemical Senses][7] - [GCCR001 OSF page][8] **GCCR002** ----------- - **"The best COVID-19 predictor is recent smell loss: a cross-sectional study."** - We investigated whether olfactory loss is a reliable predictor of COVID-19. - **Data collection tool:** [COVID-19 retrospective questionnaire][9] - **Data tranche used:** 14 May 2020, 02 July 2020 - [GCCR002 Data repository][10] - [GCCR002 Research compendium][11] - GCCR002 Pre-registration [part 1][12] and [part 2 ][13] - [GCCR002 Preprint on medRXiv][14] - [GCCR002 Publication][15] - [GCCR002 OSF page][16] **GCCR003** ----------- - **"A follow-up on quantitative and qualitative olfactory dysfunction and other symptoms in patients recovering from COVID-19 smell loss"** - We investigated recovery of chemosensory loss in participants that previously filled out the COVID-19 retrospective questionnaire. - **Data collection tool:** COVID-19 retrospective recovery questionnaire - **Data tranche used:** date - [GCCR003 Data repository][17] - GCCR003 Research compendium - [GCCR003 Pre-registration][18] - [GCCR003 Preprint on medRXiv][19] - [GCCR003 Publication][20] - [GCCR003 OSF page][21] **GCCR004** ----------- - **"Covid-19 affects taste independent of taste-smell confusions: results from a combined chemosensory home test and online survey from a large global cohort"** - The study was designed to provide a means to test (if used once) or monitor (if used more than once) chemosensory abilities. Here we propose a first analysis with the aim to assess the relationship between self-reported chemosensory abilities and the experienced chemosensory intensities. - **Data collection tool:** [Smell-&-Taste-Check][22] - **Data tranche used:** 23 March 2021 - [GCCR004 Data repository][23] - [GCCR004 Research compendium][24] - [GCCR004 Pre-registration][25] - [GCCR004 Preprint][26] - [GCCR004 Publication][27] - [GCCR004 OSF page][28] **GCCR005** (closed due to redundancy with GCCR004) ----------- - **"Recovery of smell after COVID-19 or other respiratory illness"** - Adult participants rate their sense of taste and smell at home using common items each week to track changes especially after recovery from COVID-19 or other insults, e.g., or other viral infections. **EDS001** ----------- - **"Self-reported smell and taste changes are early indicators of the COVID-19 pandemic and of the effectiveness of political decisions"** - **Project team members:** Denis Pierron, Veronica Pereda-Loth, Marylou Mantel, Maëlle Moranges, Emmanuelle Bignon, Omar Alva, Julie Kabous, Margit Heiske, Jody Pacalon, Renaud David, Caterina Dinnella, Sara Spinelli, Erminio Monteleone, Michael C. Farruggia, 7Keiland W. Cooper, Elizabeth A. Sell, Thierry Thomas-Danguin, Alyssa J. Bakke, Valentina Parma, John E. Hayes, Thierry Letellier, Camille Ferdenzi, Jérôme Golebiowski, Moustafa Bensafi - **Data collection tool:** [COVID-19 retrospective questionnaire][29] and local data - **Data tranche used:** date - [NDS001 Data repository][30] - [NDS001 Code][31] - [NDS001 Pre-registration][32] - [NDS001 Preprint on OSFpreprints][33] - [NDS001 Publication in Nature Communications][34] - [NDS001 OSF page][35] **EDS002** ----------- - **"Natural Language Processing (NLP) study of changes in smell/taste perception of COVID patients"** - **Project team members:** Pablo Meyer - **Data collection tool:** [COVID-19 retrospective questionnaire][36] - **Data tranche used:** date - EDS002 Data repository - EDS002 Research compendium - EDS002 Pre-registration - EDS002 Preprint - EDS002 Publication - [EDS002 OSF page][37] **EDS003** ----------- - **"Salty taste in COVID-19 patients"** - **Project team members:** M. Yanina Pepino, Ian Brooks, Carla Mucignat, Raul Alfaro, Elizabeth Sell - **Data collection tool:** [COVID-19 retrospective questionnaire][38] - **Data tranche used:** date - EDS003 Data repository - EDS003 Research compendium - [EDS003 Pre-registration][39] * - EDS003 Preprint - EDS003 Publication - EDS003 OSF page **EDS004** ----------- - **"Chemosensory impairments in the Italian patients with COVID-19: is there a recovery?"** - **Project team members:** Michele Dibattista,Cinzia Cecchetto, Valentina Parma, Antonella Di Pizio, Federica Genovese - **Data collection tool:** [COVID-19 retrospective questionnaire][40] - **Data tranche used:** date - EDS004 Data repository - EDS004 Research compendium - [EDS004 Pre-registration][41] * - [EDS004 Preprint][42] - [EDS004 Publication in Scientific Reports][43] - EDS004 OSF page **EDS005 (merged into GCCR003)** ----------- - **"Illness Severity in Relation to Smell and Taste Perception in COVID-19"** - **Project team members:** Daniel Houser - **Data collection tool:** [COVID-19 retrospective questionnaire][44] - **Data tranche used:** date - EDS005 Data repository - EDS005 Research compendium - EDS005 Pre-registration * - EDS005 Preprint - EDS005 Publication - EDS005 OSF page **EDS007** ----------- - **"The effects of prior disease on the change of taste and smell in the COVID-19 patients"** - **Project team members:** Jingguo Chen, Baibing Mi, Miaojia Yan, Kang Zhu, Xiaoyong Ren, Chao Yu, Vijay Ramakrishinan, Valentina Parma - **Data collection tool:** [COVID-19 retrospective questionnaire][45] - **Data tranche used:** date - EDS007 Data repository - EDS007 Research compendium - [EDS007 Pre-registration][46] * - EDS007 Preprint - [EDS007 Publication in Laryngoscope Investigative Otolaryngology][47] - EDS007 OSF page **EDS008** ----------- - **"Chemosensory dysfunction as a reliable marker for COVID-19 in adults with self-reported obesity"** - **Project team members:** Surabhi Bhutani, Paule V Joseph, Valentina Parma, Géraldine Coppin - **Data collection tool:** [COVID-19 retrospective questionnaire][48] - **Data tranche used:** date - EDS008 Data repository - EDS008 Research compendium - [EDS008 Pre-registration][49] * - [EDS008 Preprint][50] - [EDS008 Publication in Rhinology][51] - [EDS008 OSF page][52] **EDS009 (closed)** ----------- - **"Comparison between covid-19 symptoms in Israeli patients interviewed over the phone and online"** - **Project team members:** Tomer Green, Masha Niv - **Data collection tool:** [COVID-19 retrospective questionnaire][53] and local data - **Data tranche used:** date - EDS009 Data repository - EDS009 Research compendium - [EDS009 Pre-registration][54] - EDS009 Preprint - EDS009 Publication - EDS009 OSF page **EDS010** ----------- - **"Effects of antidepressant (FIASMA) intake on chemosensory perception in CoViD-19"** - **Project team members:** Jessica Freiherr, Doris Schicker, Laura Höckmeier, Johannes Kornhuber - **Data collection tool:** [COVID-19 retrospective questionnaire][55] - **Data tranche used:** date - EDS010 Data repository - EDS010 Research compendium - EDS010 Registered report (pending) - EDS010 Preprint - EDS010 Publication - EDS010 OSF page *pre-registrations may be temporarily embargoed **EDS011** ----------- - **"A Descriptive Study of GCCR Taste and Smell Check: Repeated Self-Assessment"** - **Project team members:** JiYeon Choi, Seo-Jin Chung, JaeHee Hong, Juyun Lim, Hyoshin Kim, HyunGyu Shim - **Data collection tool:** [COVID-19 retrospective questionnaire][56] - **Data tranche used:** date - EDS011 Data repository - EDS011 Research compendium - EDS011 Registered report (pending) - EDS011 Preprint - EDS011 Publication - EDS011 OSF page **EDS012** ----------- - **"Giving a voice to COVID-19 diagnosed adults: An analysis of the open-ended comments from COVID-19 smell longhaulers and non-longhaulers"** - **Project team members:** Ilja Croijmans, Surabhi Bhutani, Orietta Calcinoni, Keiland Cooper, Paloma Rohlfs Dominguez, Michael C. Farruggia, Thomas Heinbockel, Sachiko Koyama, Nick Menger, Carla Mucignat, Denis Pierron, Arnaud Tognetti, Vonnie Shields - **Data collection tool:** [COVID-19 retrospective recovery questionnaire][57] - **Data tranche used:** date - EDS012 Data repository - EDS012 Research compendium - EDS012 Registered report (pending) - [EDS012 Preprint][58] - EDS012 Publication - [EDS012 OSF page][59] *pre-registrations may be temporarily embargoed **NDS003** ----------- - **"TThe effect of COVID‐19 on smell and taste and the impact on appetite and diet in Saudi Arabia"** - **Project team members:** Nora Bin Obaid, Michael Patterson, Leigh Gibson - **Data collection tool:** tba - **Data tranche used:** date - NDS003 Data repository - NDS003 Research compendium - NDS003 Pre-registration - NDS003 Preprint - NDS003 Publication - NDS003 OSF page *pre-registrations may be temporarily embargoed **NDS004** ----------- - **"The effect of social race and socio-economic status on COVID-19 disease infection, treatment, progression, and fatality"** - **Project team members:** Kara C. Hoover, Maria Veldhuizen, Sumeia Werfalli, Isabella Nyambayo, Wambura Fobbs, Corbin Jaid Schuster - **Data collection tool:** global ethnicity and income questionnaire and other (see GitHub page) - **Data tranche used:** date - NDS004 Data repository - NDS004 Research compendium - NDS004 Pre-registration on GitHub page - NDS004 Preprint - NDS004 Publication - NDS004 [GitHub page][60] **NDS005** ----------- - **"Effects of phytochemicals on COVID-19 related symptoms including olfactory and gustatory dysfunction"** - **Project team members:** Angela Bassoli, Orietta Calcinoni, Jingguo Chen, Subha R. Das, Paloma Rohlfs Domínguez, Michael C. Farruggia, Thomas Heinbockel, Paule Joseph, Rishemjit Kaur, Sachiko Koyama, Ritesh Kumar, Tatiana Laktionova, Carla Mucignat, Ha Nguyen, Vonnie D.C. Shields, Daniel Jan Strub, Rumi Ueha, Vera Voznessenskaya - **Data collection tool:** - **Data tranche used:** date - NDS005 Data repository - NDS005 Research compendium - NDS005 Pre-registration - NDS005 Preprint - NDS005 Publication - NDS005 OSF page *pre-registrations may be temporarily embargoed **NDS006** ----------- - **"Influences of COVID-19 vaccination on post-acute sequelae of COVID-19"** - **Project team members:** Elena Cantone, Keiland W. Cooper, Michael C. Farruggia, Daniel Hwang, Paule Joseph, Svetlana Kopishinskaia, Sachiko Koyama, Tatiana Laktionova, Eri Mori, Carla Mucignat, Tiffany M. Nuessle, Kathrin Ohla, Valentina Parma, Shima Parsa, Rumi Ueha, Vera Voznessenskaya - **Data collection tool:** COVID-19 retrospective vaccination questionnaire - **Data tranche used:** date - NDS006 Data repository - NDS006 Research compendium - [NDS006 Pre-registration][61] - NDS006 Preprint - NDS006 Publication - NDS006 OSF page *pre-registrations may be temporarily embargoed [Back to home][62] [1]: https://osf.io/e68ns/wiki/11_Study%20Proposals/ [2]: https://osf.io/e68ns/wiki/21_COVID-19%20retrospective%20questionnaire/ [3]: https://osf.io/arp2u/ [4]: https://osf.io/5je93/ [5]: https://osf.io/auhs8 [6]: https://www.medrxiv.org/content/10.1101/2020.05.04.20090902v3 [7]: https://doi.org/10.1093/chemse/bjaa041 [8]: https://osf.io/a3vkw/ [9]: https://osf.io/e68ns/wiki/21_COVID-19%20retrospective%20questionnaire/ [10]: https://github.com/GCCR/gccr002/tree/master/data/processed [11]: https://github.com/GCCR/gccr002 [12]: https://osf.io/aucp9 [13]: https://osf.io/gxu7e [14]: https://www.medrxiv.org/content/10.1101/2020.07.22.20157263v2 [15]: https://academic.oup.com/chemse/advance-article/doi/10.1093/chemse/bjaa081/6048917?login=true [16]: https://osf.io/ek8jq/ [17]: https://osf.io/37sgy [18]: https://osf.io/3e6zc [19]: https://doi.org/10.1101/2021.08.28.21262763 [20]: https://doi.org/10.4193/rhin21.415 [21]: https://osf.io/98jea/ [22]: https://osf.io/e68ns/wiki/22_Smell&Taste-Self-Check/ [23]: https://github.com/GCCR/GCCR004 [24]: https://github.com/GCCR/GCCR004 [25]: https://osf.io/fhmv9 [26]: https://www.medrxiv.org/content/10.1101/2023.01.16.23284630v1 [27]: https://academic.oup.com/chemse/article/doi/10.1093/chemse/bjad020/7205685 [28]: https://osf.io/rsbv6 [29]: https://osf.io/e68ns/wiki/21_COVID-19%20retrospective%20questionnaire/ [30]: https://osf.io/k25nt/ [31]: https://osf.io/uy3xe/ [32]: https://osf.io/etm6v [33]: https://osf.io/n4p3w/ [34]: https://www.nature.com/articles/s41467-020-18963-y [35]: https://osf.io/gew7p/ [36]: https://osf.io/e68ns/wiki/21_COVID-19%20retrospective%20questionnaire/ [37]: https://osf.io/7qcvb/ [38]: https://osf.io/e68ns/wiki/21_COVID-19%20retrospective%20questionnaire/ [39]: https://osf.io/zkwu2/ [40]: https://osf.io/e68ns/wiki/21_COVID-19%20retrospective%20questionnaire/ [41]: https://osf.io/vun72/ [42]: https://www.medrxiv.org/content/10.1101/2021.03.25.21254253v1 [43]: https://www.nature.com/articles/s41598-021-96987-0 [44]: https://osf.io/e68ns/wiki/21_COVID-19%20retrospective%20questionnaire/ [45]: https://osf.io/e68ns/wiki/21_COVID-19%20retrospective%20questionnaire/ [46]: https://osf.io/ax3p5/ [47]: https://onlinelibrary.wiley.com/doi/full/10.1002/lio2.1012 [48]: https://osf.io/e68ns/wiki/21_COVID-19%20retrospective%20questionnaire/ [49]: https://osf.io/xf25v [50]: https://www.medrxiv.org/content/10.1101/2021.02.28.21252536v2 [51]: https://www.rhinologyjournal.com/Abstract.php?id=2968 [52]: https://osf.io/rbcty/ [53]: https://osf.io/e68ns/wiki/21_COVID-19%20retrospective%20questionnaire/ [54]: https://osf.io/2cw98 [55]: https://osf.io/e68ns/wiki/21_COVID-19%20retrospective%20questionnaire/ [56]: https://osf.io/e68ns/wiki/21_COVID-19%20retrospective%20questionnaire/ [57]: http:////https://osf.io/e68ns/wiki/26_COVID-19_retrospective-recovery-questionnaire/ [58]: https://www.medrxiv.org/content/10.1101/2023.03.07.23286910v1 [59]: https://osf.io/xv6mn/ [60]: https://github.com/kchoover14/covidSESrace [61]: https://osf.io/5d9kn [62]: https://osf.io/e68ns/wiki/home/