Table 1 Physical characteristics and airway assessment

Age (years)

55.1 ± 14.1

57.0 ± 11.5

P = 0.42

Sex (female)

31(52%)

31(52%)

P = 1.00

BMI (kg.m⁻²)

23.8 ± 3.2

24.4 ± 3.2

P = 0.37

Mouth opening (mm)

55.8 ± 9.9

55.9 ± 9.2

P = 0.92

Thyromental distance (mm)

75.3 ± 11.9

75.81 ± 2.1

P = 0.79

Cervical circumference(mm)

348.3 ± 29.1

348.5 ± 47.8

P = 0.97

Mallampati score

 1

35(58%)

31(52%)

P = 0.63

 2

21(35%)

26(43%)

 3

4(7%)

3(5%)

Upper lip bite test

 1

42(70%)

45(75%)

P = 0.82

 2

17(28%)

14(23%)

 3

1(2%)

1(2%)

ASA physical status

 1

39(65%)

34(57%)

P = 0.35

 2

21(35%)

26(43%)