Table 5.

Multivariate multinomial logistic regression analysis of the factors influencing body image distortion.

Variables	Categories	Body Image Distortion
		OR	95% CI	p
Subjective body type recognition	Very oversized	2.95	2.49–3.49	<0.001
	Little oversized	8.13	7.37–8.97
	Normal	0.20	0.18–0.21
	Little undersized	0.29	0.26–0.31
	Very undersized	1
Weight control	No effort	1.04	0.99–1.08	0.001
	Lose weight	1.06	1.00–1.11
	Gain weight	1.15	1.07–1.24
	Maintain weight	1
Moderate physical activity	<5 days/wk	1.05	1.01–1.10	0.022
	≥5 days/wk	1
Vigorous physical activity	<3 days/wk	0.93	0.89–0.97	<0.001
	≥3 days/wk	1
Muscle physical activity	<3 days/wk	1.04	1.00–1.08	0.078
	≥3 days/wk	1
Time of sedentary behavior	≥4 h/day	1.58	1.42–1.77	<0.001
	2–4 h/day	1.77	1.54–2.03
	<2 h/day	1
Time of using smartphones	≥4 h/day	0.81	0.64–1.01	0.179
	2–4 h/day	0.83	0.64–1.07
	<2 h/day	1

OR, odds ratio; CI, confidence interval. OR was obtained by a multiple logistic regression analysis adjusted for gender, grade, school achievement, economic status, and BMI.