Table 4.

Assumptions of staff members of the critical care unit in a questionnaire according to the following categories: 0, never; 1, rarely; 2, sometimes; 3, often; 4, mostly; and 5, always

Question	Median	Q25	Q75	Min	Max
1. How often is more than one drug administered via the same catheter line?	4	3	4	2	5
2. How often do you feel unsafe while administering drugs?	1	1	2	1	4
3. How often do you not feel confident while administering multiple medications in succession?	1	1	2	1	2
4. How often do you think physico-chemical problems occur in your department?	1	1	1	1	3
5. How often do you think these problems have serious consequences?	1	1	2	1	2
6. How often do you feel that two drugs should better not be administered together because of incompatibilities?	2	1	2	1	2
7. Nevertheless, how often do you administer them?	1	0.25	1	0	3
8. How often do you contact your nursing staff colleagues with any questions regarding incompatibilities?	2.5	2	5	1	5
9. How often do you contact your medical staff colleagues with any questions regarding incompatibilities?	3	2	4	1	5
10. How often do you search drug information sources regarding incompatibilities, e.g., the summary of product characteristics?	2	1	2.75	0	5
11. How often do you not feel confident in reconstituting?	1	1	1.75	1	2
12. How often do you contact your nursing staff colleagues if you have any questions regarding the solvent/carrier solution?	3.5	2	4	1	5
13. How often do you contact your medical staff colleagues if you have any questions regarding the solvent/carrier solution?	2	2	3	0	5
14. How often do you search drug information sources regarding solvent/carrier solution, e.g., the summary of product characteristics?	2.5	1.25	3.75	1	5
15. How often do you deal with questions regarding compatibility or physico-chemical stability of drugs outside of working hours?	1	0.25	1	0	2

“No answer” was possible (n = 14 participants)