Linear comparison of pharyngeal airway among different vertical facial types (X¯ ± S).

L indicates low angle group, N indicates normal angle group, H indicates high angle group. * indicates significant at the 0.05 probability level; NS indicates not significant at the 0.05 probability level.L代表低角度组（low angle group），N代表正常角度组（normal angle group），H代表高角度组（high angle group）。*表示在0.05显著性水平下具有统计学显著性；NS表示在0.05显著性水平下无统计学显著性。