Variables

No. of cases

CL I & II

CL III & IV

Easy

Difficult

Sex male/female

40/28

32/22

8/6

35/23

5/3

Sternomental distance

<12.5 cm

10

7

3

2

6

>12.5 cm

58

57

1

56

2

Thyromental distance

<6.5 cm

18

16

2

15

13

>6.5 cm

50

47

3

48

2

Mallampati score

1

24

23

1

24

0

2

17

17

0

15

2

3

16

13

3

14

2

4

11

9

2

10

1

Mandible position

A

53

52

1

52

1

B

15

14

1

14

1

Inter incisor gap

<3.5 cm

12

11

1

9

3

>3.5 cm

56

54

2

55

1