Table 1. Sample characteristics.

	N = 2 130
Age (years)	54 (SD: 18)
Female patient	975 (45.8%)
Junior surgeon	56 (2.6%)
On-call period	238 (11.2%)
Emergency	422 (19.8%)
Anaesthetic complication	360 (16.9%)
ASA score	2.1 (SD: 0.9)
RCI	318 (SD: 193)
Staffing level	3 (SD: 1)
Total duration (mins)	235 (SD: 137)
Preparation	15 (SD: 4)
Installation	24 (SD: 11)
Anaesthesia	27 (SD: 18)
Intervention	123 (SD: 111)
Dressing	8 (SD: 4)
Cleaning	20 (SD: 11)
Top-down cost (Euros)	2 331 (SD: 1 720)
Bottom-up cost (Euros)	2 186 (SD: 1 391)

Data shown are mean (SD) or N (%); costs are in Euros.