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. 2022 Aug 19;101(33):e30032. doi: 10.1097/MD.0000000000030032

Table 1.

Characteristics of included studies (n = 5).

Study Age (yr) BMI (kg/m2) Intervention vs control Technique for neck immobilization Sample size Country Exclude difficult airway
Abdullah et al[21] 49.9 ± 13.0 25.7 ± 4.8 23.4 Bonfils intubation fiberscope Hard cervical collar 60 Singapore Yes
43.8 ± 13.4 ± 3.4 McCoy laryngoscope
Byhahn et al[22] 46.4 ± 20.3 24.7 ± 2.7 Bonfils intubation fiberscope Hard cervical collar 76 Germany Yes
44.2 ± 19.3 25.2 ± 3.4 Macintosh laryngoscope
Gupta et al[23] 34.3 ± 11.5 NA Bonfils intubation fiberscope Hard cervical collar 120 India Yes
32.0 ± 10.3 Macintosh laryngoscope
Kok et al[24] 45 ± 13 27.0 ± 5.2 Levitan FPS Scope Manual in-line stabilization 185 Canada Yes
Macintosh laryngoscope
Turkstra et al[25] 52 ± 16 29 ± 5 Shikani Optical Stylet Manual in-line stabilization 46 Canada Yes
50 ± 18 29 ± 4 Macintosh laryngoscope