Table 4.

Comparison between uniphasic and biphasic anaphylaxis in this study

	Uniphasic, n = 107	Biphasic, n = 13	P‐value †	Cramer’s V ‡
Male sex	37 (34.6)	2 (15.3)	0.218	0.099
Age, years (IQR)	47 (30.5, 62.0)	55 (30.0, 66.0)	0.615 §	−
History of allergy	69 (64.5)	9 (69.2)	1.000	0.003
History of asthma	22 (20.6)	3 (23.0)	0.733	0.014
History of heart disease	4 (3.7)	0 (0.0)	1.000	0.010
Food	56 (52.3)	7 (53.8)	1.000	0.017
Drug	31 (29.0)	3 (23.0)	0.757	0.011
Insect	3 (2.8)	0 (0.0)	1.000	0.030
Others	2 (1.9)	0 (0.0)	1.000	0.059
Unknown	15 (14.0)	3 (23.0)	0.411	0.041
Skin and mucosa	104 (97.2)	13 (100.0)	1.000	0.03
Gastrointestinal	68 (63.4)	10 (76.9)	0.539	0.059
Respiratory	80 (74.8)	12 (92.3)	0.295	0.097
Cardiovascular	51 (47.7)	6 (46.1)	1.000	0.017
Shock	38 (35.5)	3 (23.0)	0.539	0.081
Neurological	25 (23.4)	3 (23.0)	1.000	0.030
Severity (grade 3)	57 (53.2)	5 (38.4)	0.385	0.065
Many (4–5) systems	32 (29.9)	4 (30.8)	1.000	0.023
Adrenaline	70 (65.4)	8 (61.5)	0.767	0.003
Corticosteroid	98 (91.6)	13 (100.0)	0.595	0.048
H1 blocker	104 (97.2)	13 (100.0)	1.000	0.030
H2 blocker	105 (98.1)	12 (92.3)	0.293	0.030

Data are shown as n (%) unless otherwise specified.

–, not applicable.

^†Fisher’s exact test.

^‡Cramer’s coefficient of association.

^§Mann–Whitney U‐test was used in analysis of age.