Original, first-year survey responses by ultrasound and MRI patients.

Data are expressed as the percentage of positive grading including a 95% confidence interval and as the percentage of answered questions. Significances are calculated for the distribution of positive (6, 5, 4) versus negative (3, 2, 1) grading and for answered versus left blank questions. Significances at the 99% confidence level or higher are marked in bold, significance at the 95% level in italic. Ultrasound patients experiencing contact with radiologists have a significantly higher response rate at questions 9 and 13. On the other hand, they very frequently did not respond to question 5 about an MRI safety questionnaire. For exact phrasing of questions, refer to Table 1. Detailed data for the other questions are shown in S3 Table.