Table 1 The EORTC QLQ-C30 questionnaire, sorted in descending order of difficulty (logit units) according to the patient responses in this study (questions 29 and 30, which were not reported, are excluded)

Items

Do you need help with eating, dressing, washing yourself or using the toilet?

Do you have any trouble taking a short walk outside of the house?

Have you vomited?

Have you had diarrhea?

Were you short of breath?

Were you limited in doing either your work or other daily activities?

Have you been constipated?

Have you felt nauseated?

Were you limited in pursuing your hobbies or other leisure time activities?

Did pain interfere with your daily activities?

Difficulty in concentrating on things, like reading papers or watching TV?

Did you feel irritable?

Have you lacked appetite?

Do you need to stay in bed or a chair during the day?

Trouble doing strenuous activities, like carrying a heavy bag or a suitcase?

Have you had pain?

Did you feel tense?

Have you had difficulty remembering things?

Do you have any trouble taking a long walk?

Did you worry?

Have you had trouble sleeping?

Physical condition or medical treatment interfered with your family life?

Did you feel depressed?

Physical condition or medical treatment interfered with your social activities?

Did you need to rest?

Have you felt weak?

Physical condition or medical treatment caused you financial difficulties?

Were you tired?