system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A cross-sectional study of 650 patients with confirmed bronchogenic carcinoma was conducted in patients of all age groups in order to establish a baseline picture for further mortality comparisons. All patients were investigated using thoracic ultrasound and computed tomography of the chest. Also, data about the size of the mass, invasion of lymph nodes and chest wall, pleural effusion, and eventual paralysis of the diaphragm were noted. The bias that can arise in this case, and that may hamper further conclusions on the aggressiveness and mortality of bronchogenic carcinoma, may be explained as a tendency to which of the following aspects?
assistant
Uncover more indolent cases of the disease preferentially