Table 2.

Summary of regression analyses: demographic characteristics, physical activity, and life satisfaction.

	Total (n = 2345)		Young Adults (n = 977)		Middle-Aged Adults (n = 725)		Older Adults (n = 643)
	Model 1	Model 2	Model 1	Model 2	Model 1	Model 2	Model 1	Model 2
Age	−0.23	−0.22	−0.54	−0.38	1.00	1.06	0.14	0.16
Age square (Age 2)	0.39 *	0.34 *	0.51	0.35	−0.94	−1.01	−0.17	−0.17
Gender
Male	REF	REF	REF	REF	REF	REF	REF	REF
Female	0.02	0.03	−0.02	−0.01	0.04	0.06	0.03	0.04
Education level
Elementary school	REF	REF	REF	REF	REF	REF	REF	REF
Junior high school	0.03	0.03	-- a	-- a	-- a	-- a	0.08	0.07
Senior high school	0.02	0.02	−0.03	−0.05	0.01	0.02	0.07	0.05
Undergraduate	0.14 **	0.14 **	0.02	−0.00	0.19 **	0.20 **	0.14 **	0.12 *
Postgraduate	0.10 **	0.09 **	0.04	0.01	0.12 *	0.12 *	-- b	-- b
Marital status
Single or Other	REF	REF	REF	REF	REF	REF	REF	REF
Married	0.12 ***	0.13 ***	0.12 **	0.13 **	0.17 ***	0.17 ***	0.05	0.06
Living alone
No	REF	REF	REF	REF	REF	REF	REF	REF
Yes	−0.03	−0.03	−0.02	−0.01	0.02	0.02	−0.11 *	−0.10 *
Monthly income	0.05	0.05	0.04	0.04	0.13 *	0.13 **	−0.08	−0.09
Time of vigorous activity		0.02		−0.04		0.03		0.06
Time of moderate activity		−0.04		−0.06		−0.01		−0.04
Time of walking		−0.02		−0.04		−0.01		−0.02
Physical activity level
Low-active		REF		REF		REF		REF
Moderate-active		0.12 ***		0.11 **		0.11 **		0.14 **
High-active		0.19 ***		0.23 ***		0.17 **		0.18 **

REF, reference. * p < 0.05, ** p < 0.01, *** p < 0.001. ^a: The reference education group for the young and middle-aged adult groups was elementary school and junior high school. ^b: The highest education level in the older adults group was the combination of undergraduate and postgraduate levels.