Door Opening Reasons N Overall, N = 541 Pre vs Post Incision p-value2
Post, N = 271 Pre, N = 271
Anesthesiologist Breaks 52 <0.001
0 29 (56%) 8 (31%) 21 (81%)
1 7 (13%) 3 (12%) 4 (15%)
2 6 (12%) 5 (19%) 1 (3.8%)
3 5 (9.6%) 5 (19%) 0 (0%)
4 5 (9.6%) 5 (19%) 0 (0%)
Unknown 2 1 1
Nurse Breaks 52 <0.001
0 31 (60%) 9 (35%) 22 (85%)
1 2 (3.8%) 0 (0%) 2 (7.7%)
2 9 (17%) 8 (31%) 1 (3.8%)
3 3 (5.8%) 3 (12%) 0 (0%)
4 7 (13%) 6 (23%) 1 (3.8%)
Unknown 2 1 1
Surgical Tech Breaks 52 0.22
0 46 (88%) 21 (81%) 25 (96%)
1 3 (5.8%) 3 (12%) 0 (0%)
2 3 (5.8%) 2 (7.7%) 1 (3.8%)
Unknown 2 1 1
Total Staff Breaks 52 <0.001
0 21 (40%) 2 (7.7%) 19 (73%)
1 4 (7.7%) 1 (3.8%) 3 (12%)
2 7 (13%) 5 (19%) 2 (7.7%)
3 5 (9.6%) 4 (15%) 1 (3.8%)
4 6 (12%) 6 (23%) 0 (0%)
6 4 (7.7%) 3 (12%) 1 (3.8%)
7 2 (3.8%) 2 (7.7%) 0 (0%)
8 2 (3.8%) 2 (7.7%) 0 (0%)
9 1 (1.9%) 1 (3.8%) 0 (0%)
Unknown 2 1 1
Nurse Supply Breaks 52 7.00 (4.00, 11.00) 6.50 (3.25, 10.00) 7.50 (5.00, 12.00) 0.17
Unknown 2 1 1
Vendor Supplies Breaks 52 5.00 (2.00, 6.00) 6.00 (5.00, 8.00) 2.00 (0.25, 3.75) <0.001
Unknown 2 1 1
Assessing Patient Status/Surgery Start Time 52 3.00 (1.00, 7.25) 1.00 (0.00, 1.00) 7.00 (4.25, 9.00) <0.001
Unknown 2 1 1
Hallway Door Openings 52 2.00 (0.00, 4.00) 0.00 (0.00, 1.00) 3.50 (2.00, 8.25) <0.001
Unknown 2 1 1
Case Irrelevant Discussion 52 0.013
0 27 (52%) 13 (50%) 14 (54%)
1 7 (13%) 0 (0%) 7 (27%)
2 11 (21%) 6 (23%) 5 (19%)
4 1 (1.9%) 1 (3.8%) 0 (0%)
5 2 (3.8%) 2 (7.7%) 0 (0%)
6 1 (1.9%) 1 (3.8%) 0 (0%)
8 1 (1.9%) 1 (3.8%) 0 (0%)
11 2 (3.8%) 2 (7.7%) 0 (0%)
Unknown 2 1 1
Other (phone calls, C Arm Deliver, etc... 52 6.50 (2.00, 10.50) 8.00 (3.00, 9.00) 3.50 (2.00, 12.00) 0.66
Unknown 2 1 1
No Clear Reasons 52 0.00 (0.00, 4.25) 1.00 (0.00, 6.00) 0.00 (0.00, 3.00) 0.48
Unknown 2 1 1

1 Statistics presented: n (%); Median (IQR)

2 Statistical tests performed: Fisher's exact test; Wilcoxon rank-sum test