| Item | Factor 1 | Factor 2 | Factor 3 | Factor 4 | α coefficient | |
| Factor 1 | Insufficient confirmation depending on the situation | |||||
| B19: I have omitted the confirmation 6R because I could not administer at the scheduled time | 0.867 | −0.001 | −0.044 | −0.039 | 0.861 | |
| B29: I have omitted the confirmation of the medication 6R because I kept the patient waiting | 0.735 | −0.111 | 0.171 | −0.022 | 0.861 | |
| B13: In an emergency, I have not been able to confirm 6R of the drug | 0.717 | 0.104 | −0.194 | 0.115 | 0.861 | |
| B9: I have omitted 6R when other people such as pharmacists and nurses are preparing | 0.708 | 0.089 | −0.044 | −0.001 | 0.861 | |
| B32: I have not been able to calmly confirm the oral administration | 0.583 | −0.053 | 0.203 | 0.019 | 0.862 | |
| B31: I have missed the confirmation when I am impatient with the first drug administration and so on | 0.528 | −0.016 | 0.195 | 0.004 | 0.862 | |
| Factor 2 | Unconfirmed behavior while recognizing | |||||
| B2: I have received instructions without confirming the prescription of the drug | 0.004 | 0.756 | −0.018 | −0.081 | 0.864 | |
| B4: Collation of medication instruction comments has been missed | 0.085 | 0.621 | −0.032 | 0.018 | 0.863 | |
| B3: I have not confirmed leftover drugs when receiving instructions such as additional drugs | 0.138 | 0.605 | −0.015 | −0.043 | 0.863 | |
| B6: I have forgotten to discontinue oral administration | −0.149 | 0.564 | 0.037 | 0.113 | 0.866 | |
| B1: I have judged that the oral instruction is the same as before and received it by mistake | −0.077 | 0.563 | 0.064 | 0.025 | 0.865 | |
| B7: I have left it as it is, even though I felt something was wrong with the prescription | 0.143 | 0.414 | 0.057 | 0.006 | 0.864 | |
| B10: I have neglected to confirm the drugs brought by the patient | 0.082 | 0.385 | 0.090 | −0.020 | 0.865 | |
| Factor 3 | Incorrect response due to human impact | |||||
| B38: I have not performed dropping adjustment because I was impatient due to overlapped drip exchanges of multiple patients | −0.031 | −0.068 | 0.733 | 0.056 | 0.864 | |
| B40: I have vaguely confirmed the infusion because the work was interrupted due to a conversation with the patient and family | 0.056 | 0.037 | 0.647 | 0.019 | 0.863 | |
| B39: I have missed the confirmation of the operation status of IV drip including syringe pump | 0.073 | 0.064 | 0.573 | −0.062 | 0.864 | |
| B48: I have taken the wrong action because I judge that the medication is the same as usual when I am in charge of the same patient | −0.108 | 0.209 | 0.549 | 0.044 | 0.865 | |
| B50: I have not confirmed the status of the drip infusion | 0.093 | 0.005 | 0.541 | −0.030 | 0.864 | |
| Factor 4 | Missing due to multiple tasks | |||||
| B25: I have missed scheduled medication due to complicated work | 0.039 | 0.012 | −0.018 | 0.901 | 0.863 | |
| B23: I have forgotten to administer scheduled medicines during multiple tasks | 0.012 | −0.001 | 0.051 | 0.690 | 0.865 |