Correlations between Excessive Body Mass Index, Body Perception, Physical Activity, and Respiratory Functions among Youths in an Urban Setting of Vietnam

Table 4

The anthropometric index associated with body perception, physical activity, and respiratory function.

Anthropometric index	Body perception^a OR (95% CI)	Active^a OR (95% CI)	FVC^b Coef (95% CI)	FEV1^b Coef (95% CI)	Tiffeneau^c Coef (95% CI)
Gender
Male	Ref	Ref	Ref	Ref	Ref
Female	1.1 (0.7; 1.9)	0.8 (0.5; 1.4)	-1.0 (-1.1; -0.8)	-0.8 (-1.0; -0.6)	0.1 (-0.1; 0.2)
Age	0.8 (0.6; 1.0)	0.9 (0.8; 1.2)	0.0 (-0.0; 0.1)	-0.0 (-0.1; 0.0)
Hometown
Urban	Ref	Ref	Ref	Ref	Ref
Rural	0.8 (0.4; 1.3)	0.8 (0.5; 1.3)	-0.1 (-0.3; 0.0)	-0.1 (-0.2; 0.1)	-0.0 (-0.1; 0.1)
Exposing tobacco smoke (including active and passive smoking)
No	Ref	Ref	Ref	Ref	Ref
Yes	1.7 (0.7; 3.8)	2.0 (0.8; 4.8)	-0.1 (-0.3; 0.1)	-0.2 (-0.4; 0.1)	-0.1 (-0.3; 0.1)
Alcohol drinker
No	Ref	Ref	Ref	Ref	Ref
Yes	1.8 (1.0; 3.2)	2.8 (1.5; 5.0)	0.0 (-0.1; 0.2)	-0.1 (-0.3; 0.1)	-0.0 (-0.2; 0.1)
Self-rated health (per 10.3 score)	0.9 (0.7; 1.2)	1.2 (0.9; 1.5)	-0.0 (-0.1; 0.0)	-0.0 (-0.1; 0.0)	-0.0 (-0.1; 0.0)
BMI classification
Normal	Ref	Ref	Ref	Ref	Ref
Underweight	0.9 (0.5; 1.6)	0.8 (0.4; 1.5)	-0.1 (-0.3; 0.1)	-0.2 (-0.4; 0.0)	-0.0 (-0.2; 0.1)
Overweight/obesity	1.4 (0.6; 3.1)	3.6 (1.5; 8.4)	0.4 (0.2; 0.6)	0.4 (0.1; 0.6)	0.1 (-0.0; 0.3)
Waist (per 7.2 cm)	1.0 (0.7; 1.3)	0.8 (0.6; 1.1)	-0.0 (-0.1; 0.1)	-0.0 (-0.1; 0.1)	-0.0 (-0.1; 0.0)
Level of physical activity
Low	Ref	Ref	Ref	Ref	Ref
Moderate	0.8 (0.5; 1.3)		0.0 (-0.1; 0.2)	-0.1 (-0.2; 0.1)	-0.0 (-0.2; 0.1)
High	0.6 (0.3; 1.3)		-0.1 (-0.3; 0.1)	-0.1 (-0.3; 0.1)	-0.0 (-0.1; 0.1)