Relationship between physical activity and specific working memory indicators of depressive symptoms in university students

Table 1 Basic information of university students with different depression symptoms, (%)

Demographic indicators	Overall	Without depression	With depression	Comparison among groups
	(n = 143)	(n = 112)	(n = 31)	χ²/t	P value
Gender (male)	47.55	48.21	45.16	0.091	0.763
Age (yr)	19.53 ± 1.149	19.52 ± 1.139	19.58 ± 1.205	0.959	0.789
BMI (kg/m²)	21.483 ± 3.939	21.729 ± 4.039	20.592 ± 3.468	0.245	0.156
Registered household (city)	52.45	58.04	32.26	6.469	0.011a
Only child (yes)	46.15	50.89	29.03	4.669	0.031a
Single-parent family (yes)	9.09	9.82	6.45	0.334	0.564
Average education year of parents (yr)	11.119 ± 3.598	11.371 ± 3.370	10.210 ± 4.260	0.117	0.112
Drinking habit (yes)	20.28	18.75	25.81	0.748	0.387
Smoking habit (yes)	2.10	2.68	0	0.848	0.357
Family relations
Amiable	50.35	53.57	38.71	3.466	0.177
General	47.55	43.75	61.29
Many conflicts	2.10	2.68	0
Study pressure
Easy	22.38	25.89	9.68	7.107	0.029a
General	54.55	55.36	51.61
Difficult	23.08	18.75	38.71
Interpersonal relationship
Good	74.13	83.04	41.94	22.009	< 0.001b
General	23.78	16.07	51.61
Bad	2.10	0.89	6.45
Social activities
> Three times/wk	2.80	1.79	6.45	13.625	0.001b
≤ Three times/wk	83.22	89.29	61.29
Hardly	13.99	8.93	32.26

^aP < 0.05.

^bP < 0.01.

BMI: Body mass index.