Table 1

 The eight-point ordinal scale used to weigh observed events

LevelObserved related effects
1Potentially distracting stimulus
2Non-case-related stimulus noticed by staff, not by sterile team
3Sterile team member momentarily distracted
4Sterile team member engages in distraction
5Sterile team member’s primary task interrupted
6Sterile team momentarily distracted
7Sterile team engage in secondary tasks
8Sterile team’s work interrupted—operation flow disrupted