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Table 3 Characteristics of children 15–30 kg

From: Do epinephrine auto-injectors have an unsuitable needle length in children and adolescents at risk for anaphylaxis from food allergy?

Characteristics

Total

(n = 102)

Patients with STBDmax

t test

p value

≥12.7 mm

(n = 91)

<12.7 mm

(n = 11)

Age (months) median (IQR)

72 (48–84)

72 (48–84)

60 (48–78)

0.019

Males. n (%)

62 (60.4)

54 (59.3)

8 (72.3)

0.074

Weight (kg). mean (SD)

21.3 (4.0)

21.4 (3.9)

19.7 (4.2)

ns

Height (m). mean (SD)

1.16 (0.12)

1.16 (0.12)

1.18 (0.15)

ns

BMI (kg/m2). mean (SD)

15.8 (2.0)

16.1 (1.9)

14 (1.4)

0.0012

STMDmax (mm). mean(SD)

5.8 (1.5)

5.9 (1.5)

4.8 (1.0)

0.025

STMDmin (mm). mean (SD)

6.7 (1.7)

6.8 (1.7)

5.5 (1.3)

0.019

STBDmax (mm). mean (SD)

16.7 (3.0)

17.3 (2.5)

11.6 (0.9)

<0.000001

STBDmin (mm). mean (SD)

29.5 (3.9)

30.0 (3.7)

25.4 (2.6)

0.0002

  1. Distance skin surface to bone with high pressure applied to the ultrasound probe (STBDmax). Data on one needle length 12.7 mm are given. Those with STBDmax < 12.7 mm. i.e., with a risk of penetrating the femur and those with more than 12.7 mm STBDmax. The differences between groups was tested by a two-tailed t-test. The inter-quartile ratio (IQR) percentage (%) and standard deviations (SD) are given within the brackets