Missed Registration of Disease Codes for Pediatric Anaphylaxis at the Emergency Department

Table 1

General characteristics of anaphylaxis cases registered accurately or inaccurately.

Variables	Overall (n = 184)	Accurate (n = 23)	Inaccurate coding (n = 161)
Average age, years	4.5 ± 4.7	7.2 ± 5.1^∗	4.2 ± 4.6^∗	0.003^‡
Sex, male (%)	103 (56.0)	14 (60.9)	89 (55.3)	0.616
Transportation to ED (%)				0.148
Public ambulance	11 (6.0)	5 (21.7)	6 (3.7)
Other medical facility	10 (5.4)	2 (8.7)	11 (6.8)
Individual transportation	160 (87.0)	16 (69.6)	144 (89.4)
Elapsed time from, min
Exposure to symptom onset	10 (0–30)^†	10 (3–30)^†	10 (0–35)^†	0.827^§
Symptom onset to ED arrival	120 (60–210)^†	60 (30–120)^†	120 (60–232)^†	0.046^§
Past history of allergy (%)	63 (34.2)	13 (56.5)	50 (31.1)	0.016
Anaphylaxis	1 (0.5)	1 (4.3)	0 (0.0)	0.125^∥
Asthma	3 (1.6)	0 (0.0)	3 (1.9)	1.000^∥
Allergic rhinitis	8 (4.3)	2 (8.7)	6 (3.7)	0.263^∥
Atopic dermatitis	19 (10.3)	4 (17.4)	15 (9.3)	0.266^∥
Drug allergy	6 (3.3)	2 (8.7)	4 (2.5)	0.164^∥
Food allergy	33 (17.9)	5 (21.7)	28 (17.4)	0.570^∥
Comorbid diseases (%)	7 (3.8)	1 (4.3)	6 (3.7)	1.000^∥
Fever (%)	18 (9.8)	1 (4.3)	17 (10.6)	0.705^∥

Mean ± standard deviation; ^†median (interquartile range); ^‡Student’s t-test; ^§Mann–Whitney test; ^∥Fisher’s exact test. ED = emergency department.