The main goal of this trial is to establish the performance characteristics and to develop a decision-algorithm of a new symptom-based scoring system with respect to the identification of elderly lung cancer patients developing pneumonitis after radiotherapy. To assess the performance characteristics of the symptom-based scoring system for detection of radiation pneumonitis the receiver operating characteristic (ROC) curve is used to show the connection between sensitivity and specificity for every possible cut-off for the symptom-based scoring system and to select the optimal scoring point for detection of radiation pneumonitis. The area under the ROC curve (AUC) is calculated to prove the diagnostic ability of the scoring system. Secondary aims include patient satisfaction with the symptom-based scoring system (symptom-questionnaire, paper version).
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Number of participants with symptomatic radiation pneumonitis (grade ≥2)
Timeframe: start of radiotherapy until 24 weeks following radiotherapy