Table 2. Association between BMI, WC, total BF percentage, and atopic dermatitis (AD).

	Model 1				Model 2				Model 3
	Male	P	Female	P	Male	P	Female	P	Male	P	Female	P
BMI (kg/m2)		0.9241		0.0095		0.8106		0.0182		0.7644		0.0994
-18.5	0.88 (0.27, 2.84)		1.61 (0.75, 3.46)		0.77 (0.24, 2.52)		1.57 (0.72, 3.46)		0.63 (0.14, 2.87)		1.47 (0.63, 3.42)
18.5-23	1.01 (0.51, 1.98)		1.29 (0.70, 2.39)		0.92 (0.46, 1.82)		1.27 (0.69, 2.36)		0.84 (0.39, 1.83)		1.239 (0.66, 2.34)
23-25	1		1		1		1		1		1
25-30	1.26 (0.63, 2.50)		1.98 (0.96, 4.09)		1.27 (0.65, 2.51)		2.00 (0.96, 4.14)		1.40 (0.68, 2.90)		2.06 (0.97, 4.35)
30-	0.95 (0.31, 2.88)		4.38 (1.69, 11.34)		0.88 (0.28, 2.76)		4.08 (1.53, 10.93)		1.15 (0.24, 5.44)		4.46 (1.29, 15.46)
WC (cm)		0.585		0.0297		0.4491		0.028
Male -85; female -75	0.73 (0.39, 1.35)		1.19 (0.70, 2.01)		0.67 (0.36, 1.50)		1.10 (0.64, 1.89)
Male 80-90; female 75-80	1		1		1		1
Male 90-; female 80-	0.74 (0.36, 1.52)		2.12 (1.11, 4.03)		0.73 (0.36, 1.50)		2.05 (1.07, 3.94)
Total BF percentage		0.1803		0.1935		0.1935		0.0536		0.1465		0.149
Q1	0.49 (0.25, 0.97)		1.37 (0.78, 2.42)		0.47 (0.23, 0.96)		1.46 (0.83, 2.56)		0.43 (0.21, 0.90)		1.49 (0.83, 2.65)
Q2	1		1		1		1		1		1
Q3	0.85 (0.45, 1.63)		1.42 (0.80, 2.53)		0.84 (0.44, 1.63)		1.46 (0.82, 2.61)		0.89 (0.46, 1.74)		1.43 (0.79, 2.57)
Q4	0.97 (0.54, 1.73)		2.12 (1.24, 3.61)		0.91 (0.50, 1.64)		2.10 (1.24, 3.57)		1.05 (0.49, 2.25)		1.94 (1.09, 3.48)

We divided the groups into four categories (Q1 to Q4) based on KNHANES total BF percentage data, ranging from the lowest quartile group to the highest quartile group, respectively. Values were generated using a multiple linear regression analysis after adjusting for age (model 1); age, smoking, drinking, exercise, vitamin D, income level, and single status (model 2); age, smoking, drinking, exercise, vitamin D, income level, single status, and WC (model 3).

BMI, body mass index; WC, waist circumference; BF, body fat.