This study is focused on understanding complications related to Cystic Fibrosis-Related Diabetes (CFRD) in teenagers and adults with Cystic Fibrosis (CF). Cystic Fibrosis is a genetic disorder affecting the lungs and other organs, and CFRD is a type of diabetes seen in people with CF. The goal is to check how common certain health issues are in people with CFRD. **Key Points:** - **Participation Length:** Participants must have had CFRD for at least 5 years and be 12 years or older. - **Visits/Requirements:** Participants must provide written consent and be able to follow the study rules. - **Exclusions/Risks:** If you are pregnant, have had a transplant, or certain heart and artery issues, you may not be able to participate. For this study, you'll need to prove you have CF with specific tests. Some health conditions may prevent participation, and there are special rules for those with heart rhythm issues or previous surgeries. This research aims to provide better understanding and care for people with CFRD.