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Table 1 Data quality: Number of respondents who ‘did not answer’ and who answered ‘don’t know’. Only items with >3% of respondents answering ‘don’t know’ are shown. Total n = 3000 for all items

From: Measurement properties of the Danish version of the Awareness and Beliefs about Cancer (ABC) measure

  Did not answer
% (n)
Don’t knowa
% (n)
Awareness of cancer symptoms
Response options: yes; no.
 Q10. Persistent unexplained pain 0 (0) 3.4 (101)
 Q11. Unexplained bleeding 0 (0) 4.5 (135)
 Q14. Persistent difficulty in swallowing 0 (0) 3.4 (101)
 Q16. Sore that does not heal 0 (1) 4.5 (134)
 Q17. Unexplained night sweats 0 (0) 8.2 (245)
Beliefs about cancer
Response options: strongly disagree; tend to disagree; tend to agree; strongly agree.
 Q29. Most cancer treatment is worse than the cancer itself 0.3 (8) 9.9 (296)
Awareness of 5-year survival from cancer
Response options: 0; 1; 2; 3; 4; 5; 6; 7; 8; 9; 10.
 Q34. Out of 10 people diagnosed with bowel cancer, how many do you think would be alive 5 years later? 0.1 (3) 5.0 (151)
 Q36. Out of 10 people diagnosed with ovarian cancer, how many do you think would be alive 5 years later? 0.2 (5) 6.3 (189)
 Q37. Out of 10 people diagnosed with lung cancer, how many do you think would be alive 5 years later? 0.2 (5) 3.1 (93)
Awareness of risk factors for cancer
Response options: strongly disagree; tend to disagree; tend to agree; strongly agree
 QN3. Drinking more than 1 unit of alcohol a day 0 (0) 3.1 (94)
 QN5. Eating red or processed meat once a day or more 0 (1) 7.5 (224)
 QN6. Being obese 0 (1) 4.1 (124)
 QN8. Being over 70 years old 0 (1) 3.2 (96)
 QN9. Having a close relative with cancer 0.1 (2) 3.1 (94)
 QN10. Infection with HPV, Human Papillomavirus 0 (0) 68.3 (2050)
 QN13. Exposure to ionising radiation from, for example, radioactive materials, x-rays or radon 0.1 (2) 3.8 (114)
  1. aDon’t know was not provided as a response option in any items, but was noted by the interviewer when respondents answered ‘don’t know’ unprovokedly