Hi All

I am conducting a quality of life study in lung cancer patients using EORTC QLQ C30 and LC13.

However, in EORTC LC13 ... According to the manual: ''The dyspnoea scale should only be used if all three items have been answered. Some respondents ignore question 5 because they never climb stairs; in this case, the score for the dyspnoea scale would be biased if it were based upon the other two items. Hence if item 5 is missing then items 3 and 4 should be used as single-item measures''.

Some respondents ignored question 3,4 or 5 ... how can I make up for missing data in the LCDY domain? As I don't want to have extra 3 domains instead of one dyspnea scale

Thank you