The German National Pandemic Cohort Network (NAPKON): rationale, study design and baseline characteristics.
Authors: Schons Maximilian Jakob , Pilgram Lisa , Reese Jens-Peter , Stecher Melanie , Anton Gabriele , Appel Katharina , Bahmer Thomas , Bartschke Alexander , Bellinghausen Carla , Bernemann Inga , Brechtel Markus , Brinkmann Folke , Brünn Clara , Dhillon Christine , Fiessler Cornelia , Geisler Ramsia , Hansch Stefan , Hanses Frank , Hanß Sabine , Herold Susanne , Heyder Ralf , Hofmann Anna-Lena , Hopff Sina Marie , Horn Anna , Jakob Carolin , Jiru-Hillmann Steffi , Keil Thomas , Khodamoradi Yascha , Kohls Mirjam , Kraus Monika , Krefting Dagmar , Kunze Sonja , Kurth Florian , Lieb Wolfgang , Lippert Lena Johanna , Lorbeer Roberto , Lorenz-Depiereux Bettina , Maetzler Corina , Miljukov Olga , Nauck Matthias , Pape Daniel , Püntmann Valentina , Reinke Lennart , Römmele Christoph , Rudolph Stefanie , Sass Julian , Schäfer Christian , Schaller Jens , Schattschneider Mario , Scheer Christian , Scherer Margarete , Schmidt Sein , Schmidt Julia , Seibel Kristina , Stahl Dana , Steinbeis Fridolin , Störk Stefan , Tauchert Maike , Thibeault Charlotte , Toepfner Nicole , Ungethüm Kathrin , Vadasz Istvan , Valentin Heike , Wiedmann Silke , Zoller Thomas , Nagel Eike , Krawczak Michael , von Kalle Christof , Illig Thomas , Schreiber Stefan , Witzenrath Martin , Heuschmann Peter , Vehreschild Jörg Janne 
Published: January 2022

Abstract
The German government initiated the Network University Medicine (NUM) in early 2020 to improve national research activities on the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) pandemic. To this end, 36 German Academic Medical Centers started to collaborate on 13 projects, with the largest being the National Pandemic Cohort Network (NAPKON). The NAPKON’s goal is creating the most comprehensive Coronavirus Disease 2019 (COVID-19) cohort in Germany. Within NAPKON, adult and pediatric patients are observed in three complementary cohort platforms (Cross-Sectoral, High-Resolution and Population-Based) from the initial infection until up to three years of follow-up. Study procedures comprise comprehensive clinical and imaging diagnostics, quality-of-life assessment, patient-reported outcomes and biosampling. The three cohort platforms build on four infrastructure core units (Interaction, Biosampling, Epidemiology, and Integration) and collaborations with NUM projects. Key components of the data capture, regulatory, and data privacy are based on the German Centre for Cardiovascular Research. By December 01, 2021, 34 university and 34 non-university hospitals have enrolled 4,241 patients with local data quality reviews performed on 2,812 (66%). 47% were female, the median age was 53 (IQR: 38-63)) and 3 pediatric cases were included. 30% of patients were hospitalized, 11% admitted to an intensive care unit, and 4% of patients deceased while enrolled. 7,143 visits with biosampling in 3,595 patients were conducted by November 29, 2021. In this overview article, we summarize NAPKON’s design, relevant milestones including first study population characteristics, and outline the potential of NAPKON for German and international research activities.Trial registration:· https://clinicaltrials.gov/ct2/show/NCT04768998· https://clinicaltrials.gov/ct2/show/NCT04747366· https://clinicaltrials.gov/ct2/show/NCT04679584