i-gel (n=51) SLMA (n=46)
Surgical specialty
Orthopaedics
General
Gynaecology
Urology
ENT
Not stated

Duration of surgery; min
22
18
5
4
1
1

45 (25-60) [5-200]
15
18
3
9
0
1

40 (22.8-50) [5-120]
Patient
Gender f:m: not recorded
Age; years
Weight; kg
Height; m
BMI; kg m-2
ASA 1:2:3:not recorded
Mallampati class: 1:2:3:not recorded
26:24:3
54 (42-64) [19-83]
75 (69-88) [52-109]
1.7 (1.63-1.80) [1.53-1.85]
26.5 (23.6-29.4) [19-37.7]
26:22:0:3
28:14:5:4
22:23:1
57 (42-66.5) [21-76]
73 (66-88) [47-106]
1.73 (1.65-1.8) [1.49-1.96]
25.9 (23-29.4) [15.9-38.9]
24:17:2:3
32:13:0:1
Anaesthetic variables
Size of device 3:4:5
Grade of anaesthetist; consultant: other
7:40:4
40:11
3:32:11
34:12
Table 1: Patient and procedure details. Continuous data presented as median (interquartile range) [range].