Table 2 Characteristics of patients in the intervention and control groups

Age (y)

5.5 ± 2.24

6.18 ± 1.62

-0.683

(-1.39 & 0.024)

0.06^c

Sex

Male

50 (83.3%)

45 (75%)

-

0.26^a

Female

10 (16.7%)

15 (25%)

BMI (kg/m2)

17.04 ± 2.82

16.51 ± 3.42

0.53

(-0.6 & 1.66)

0.35^c

BMI for age

Underweight

(< 5 p)

8 (13.3%)

9 (15%)

-

0.66^a

Healthy weight

(5≤ - <85 p)

28 (46.7%)

33 (55%)

Overweight

(85≤ - <95 p)

10 (16.7%)

9 (15%)

Obese

(95 p ≤ )

14 (23.3%)

9 (15%)

Ratio of height to thyromental distance

3.565 (1.92–6.75)

(3.75 ± 1.01)

3.76 (1.85–8.9)

(4.05 ± 1.31)

-0.29

(-0.71 & 0.13)

0.30^d

Mallampati class (I/II/III/IV)

Easy

43 (71.7%)

40 (66.7%)

-

0.55^b

Medium

16 (26.7%)

20 (33.3%)

Difficult/ difficult/very difficult

1 (1.7%)

0 (0%)

Inter-incisor Gap (cm)

3.65 ± 0.55

3.82 ± 0.58

-0.17

(-0.37 & 0.04)

0.11^c

Thyromental distance (cm)

5.16 ± 1.21

5.48 ± 0.93

-0.32

(-0.71 & 0.06)

0.11^c

Sternomental distance (cm)

10.08 ± 2.11

10.41 ± 1.47

-0.33

(-0.98 & 0.33)

0.33^c

Neck Circumference (cm)

24.32 ± 2.12

25.05 ± 1.85

-0.73

(-1.45 & -0.01)

0.05^c