Table 5. Discriminant validity of the K-FAQLQ-PF.

Variable		Total score	P value	Emotional impact	P value	Food anxiety	P value	Social and dietary limitations	P value
Sex			0.118		0.120		0.475		0.077
	Male	2.81 (1.86, 3.69)		2.38 (1.51, 3.17)		3.13 (1.73, 4.13)		3.33 (1.80, 4.37)
	Female	3.43 (1.98, 3.87)		2.85 (1.69, 3.67)		3.00 (2.50, 4.38)		3.78 (2.63, 4.60)
Age (year)			0.134		0.221		0.012		0.124
	0–3	2.61 (1.57, 3.62)		2.33 (1.00, 3.29)		2.67 (1.08, 3.58)		3.40 (1.85, 4.55)
	4–6	3.23 (2.18, 3.99)		2.65 (1.78, 3.50)		3.27 (2.45, 4.13)		3.67 (2.59, 4.53)
	7–12	3.05 (1.86, 4.07)		2.46 (1.75, 3.63)		3.56 (2.19, 4.41)		3.39 (1.53, 4.22)
Age at diagnosis of food allergy (year)			0.013		0.027		0.060		0.008
	< 3	3.18 (2.06, 3.78)		2.57 (1.70, 3.50)		3.13 (2.29, 4.13)		3.65 (2.20, 4.50)
	≥ 3	1.78 (0.99, 3.32)		1.44 (0.83, 2.89)		2.00 (1.00, 3.62)		2.04 (0.83, 3.72)
Offending food allergen			0.005		0.010		0.159		< 0.001
	EW, CM, or wheat	3.18 (2.09, 3.87)		2.60 (1.70, 3.50)		3.14 (2.06, 4.13)		3.67 (2.35, 4.54)
	Foods other than EW, CM, and wheat	1.91 (1.05, 3.52)		1.77 (0.81, 2.52)		2.94 (1.19, 3.72)		1.56 (0.67, 3.28)
Number of restricted foods			0.043		0.152		0.025		0.081
	< 4	2.97 (1.75, 3.74)		2.40 (1.40, 3.32)		3.00 (1.69, 4.00)		3.40 (1.80, 4.44)
	≥ 4	3.43 (2.34, 4.13)		2.67 (1.90, 3.69)		3.50 (2.75, 4.63)		3.78 (2.40, 4.60)
Anaphylaxis			0.001		0.012		0.011		< 0.001
	Yes	3.31 (2.27, 4.12)		2.73 (1.86, 3.60)		3.29 (2.38, 4.29)		3.79 (2.53, 4.62)
	No	2.41 (1.40, 3.54)		2.16 (1.11, 3.08)		2.87 (1.34, 3.75)		2.84 (1.40, 3.79)
Carriage of epinephrine auto-injectors			0.035		0.164		0.027		0.026
	Yes	3.16 (2.04, 3.91)		2.50 (1.70, 3.45)		3.14 (2.33, 4.13)		3.67 (2.24, 4.53)
	No	2.47 (1.29, 3.63)		2.40 (1.33, 3.30)		2.75 (1.13, 4.00)		3.13 (1.56, 3.89)
Atopic dermatitis			0.111		0.015		0.196		0.269
	Yes	3.23 (2.09, 3.87)		2.80 (1.78, 3.58)		3.13 (2.33, 4.13)		3.67 (2.03, 4.59)
	No	2.70 (1.67, 3.65)		2.13 (1.33, 2.92)		2.87 (1.63, 4.09)		3.17 (1.88, 4.08)
Asthma			0.188		0.416		0.039		0.648
	Yes	3.34 (2.46, 4.11)		2.46 (1.90, 3.80)		3.88 (2.75, 4.38)		3.67 (2.50, 4.44)
	No	3.02 (1.83, 3.73)		2.50 (1.50, 3.33)		3.00 (1.71, 4.00)		3.50 (1.94, 4.50)
Allergic rhinitis			0.422		0.496		0.618		0.361
	Yes	2.96 (1.74, 3.91)		2.43 (1.47, 3.53)		3.13 (1.69, 4.13)		3.47 (1.64, 4.47)
	No	3.20 (2.12, 3.76)		2.60 (1.70, 3.33)		3.13 (2.28, 4.13)		3.55 (2.31, 4.50)
Family history of allergic disease			0.511		0.528		0.445		0.720
	Yes	3.02 (1.83, 3.76)		2.46 (1.40, 3.42)		3.00 (2.00, 4.06)		3.60 (1.80, 4.50)
	No	3.30 (1.98, 3.86)		2.77 (1.70, 3.40)		3.29 (1.75, 4.13)		3.50 (2.25, 4.44)
Residential area			0.004		0.005		0.060		0.001
	Seoul, Gyeonggi-do, and Incheon	2.71 (1.68, 3.64)		2.15 (1.36, 3.05)		3.00 (1.73, 3.75)		2.89 (1.65, 4.00)
	Others	3.43 (2.13, 4.21)		2.80 (1.83, 3.77)		3.33 (2.00, 4.67)		3.80 (2.75, 4.67)

Data are represented as median (interquartile ranges). Bold P values are lower than 0.05.

K-FAQLQ-PF, Korean version of the Food Allergy Quality of Life Questionnaire Parent Form; CM, cow’s milk; EW, egg whites.