. 2020 Jul 4;17(13):4817. doi: 10.3390/ijerph17134817

Table 3.

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

	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	−0.16	−0.16	−0.74	−0.62	0.77	1.01	1.30	1.28
Age square (Age ²)	0.30 *	0.26 *	0.69	0.57	−0.65	−0.90	−1.36	−1.34
Gender
Male	REF	REF	REF	REF	REF	REF	REF	REF
Female	0.02	0.04	0.00	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	−0.00	−0.00	-- ^a	-- ^a	-- ^a	-- ^a	0.05	0.05
Senior high school	0.02	0.02	−0.06	−0.07	0.08	0.09	0.05	0.04
Undergraduate	0.10 *	0.10 **	−0.03	−0.04	0.21 **	0.21 **	0.11 *	0.10 *
Postgraduate	0.05	0.05	−0.05	−0.07	0.14 **	0.15 **	-- ^b	-- ^b
Marital status
Single or Other	REF	REF	REF	REF	REF	REF	REF	REF
Married	0.08 **	0.09 ***	0.09 *	0.10 *	0.13 **	0.13 **	0.02	0.02
Living alone
No	REF	REF	REF	REF	REF	REF	REF	REF
Yes	−0.04	−0.03	−0.05	−0.05	0.02	0.02	−0.09	−0.08
Monthly income	0.02	0.02	0.00	−0.00	0.11 **	0.10 *	−0.08	−0.08
Time of vigorous activity		−0.01		−0.06		0.01		0.01
Time of moderate activity		−0.02		−0.02		0.01		−0.06
Time of walking		−0.03		−0.02		−0.03		0.00
Physical activity level
Low-active		REF		REF		REF		REF
Moderate-active		0.09 ***		0.08 *		0.07 *		0.11 *
High-active		0.19 ***		0.16 **		0.19 ***		0.21 **

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.