Lasgaard; thank you for your willingness to be a part of this adventureeach of you have contributed with your skills to improve the quality of the thesis and have taught me important knowledge and skills which I can use in my future career. Second, I want to thank all my collaborators as this PhD is highly based on collaboration with different research environments. Thank you to Steno Diabetes Center Copenhagen, especially PhD-student Stine Hedegaard Scheuer, Chief Consultant Lars Diaz, and

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... or Researcher Gregers Stig Andersen. It has been a pleasure to collaborate with you and to work on your project database. Thank you for your patience, Stine. It has been a great enjoyment to get into the R universe together with you and a pleasure to introduce you to the methodology of conducting a review. I look forward to our future collaborations. Thank you, Lars, for all your support and advices while I conducted the mediation analyses. Thank you to Associate Professor Femke Rutters, Amsterdam UMC. You have been an inspiration in recent years, and I'm very pleased that I had the opportunity to visit you in September 2021. I trust that we will continue our collaboration. Further, I want to thank DEFACTUM, Central Denmark Region, and OPEN, Odense University Hospital, for your contributions with methodological considerations and providing access to data. Thank you to Steno Diabetes Center Odense for financial support of getting access to data for one of the included papers (paper 6). Thank you to all my former and current colleagues at the Department of Psychology, University of Southern Denmark. To Rikke Holm Bramsen, thank you for being an ideal role model in the beginning of my research careeryou showed me how to invest in work but always have your heart closest to family. A special thanks to my wing-girls: Julie Christiansen and Sille Schandorph Løkkegaard. To Juliemy partner in crime -I can always count on you when new research ideas pop up. To Sillethank you for being an amazing roomie at the office. Im grateful that my work has blessed me with two such amazing friends.