Sociodemographic and medical data

Sociodemographic characteristics (age, gender, education level and living situation) will be assessed at baseline using a study-specific questionnaire. Clinical characteristics including information on cancer stage (TNM classification) and cancer treatment, time since TL and co-morbidity will be collected from the hospital information system using a study-specific case report form. Co-morbidity will be measured using the Adult Comorbidity Evaluation 27 (ACE-27), in which patients can be classified into one of four grades of comorbidity (none, mild, moderate or severe) [44]. Besides, a case report form on health care use in the hospital during the study period, including visits to medical specialists, day treatment (e.g. chemotherapy) and hospital admission, will be completed using the hospital information system.