Table 2

Characteristics of operating theatre (OT) staff responses (n=920) in a longitudinal follow-up study on hospital safety culture before (2009) and after (2010 and 2017) the implementation of the WHO’s Surgical Safety Checklists in a stepped wedge cluster-randomised controlled trial at Haukeland University Hospital, Bergen, Norway

Survey years
Characteristics200920102017
n=349%n=292%n=279%
Profession
 Surgeon12535.89432.25017.9
 OT nurse7822.37024.07426.5
 Anaesthesiologist4412.64114.04215.1
 Nurse anaesthetist7722.17124.07526.9
 Ancillary personnel257.2175.8165.7
 Missing227.9
Years in profession
 <1102.9144.8145.0
 1–59727.87826.76422.9
 6–1010329.57325.05018.3
 11–154011.54214.44315.8
 16–20257.23813.04817.2
 >216518.64114.05419.4
 Missing92.662.162.2
Weekly working hours
 <20164.672.472.5
 20–3714040.411439.012645.2
 >3718954.216857.514150.5
 Missing30.931.051.8
Handling patients
 Yes32292.326992.122580.6
 No216.0175.8134.7
 Missing61.762.14114.7