Table 3.

Regression analysis results of smoking amount, screen time, and education years on BMI of older adults.

Predictive variable	Model 1		Model 2		Model 3		Model 4
	β	t	β	t	β	t	β	t
Education years	0.048	4.798***	−0.102	−4.642***	0.246	7.150***	0.039	3.907***
Smoking amount							−0.026	−4.902***
Screen time							0.025	7.491***
R 2	0.033		0.192		0.044		0.042
F	41.415***		291.615***		55.882***		40.659***

*P < 0.05; **P < 0.01; ***P < 0.001.