Table 1.

Descriptive statistics for the network variables.

Group (N)	Item	Node	M	SD	Skewness	Kurtosis	Strengtha	Predictability
JH (1793)	PHQ1	Anhedonia	1.68	0.88	0.07	−0.88	−0.17	0.24
	PHQ2	Sad Mood	1.46	0.91	0.29	−0.77	1.78	0.31
	PHQ3	Sleep	1.47	1.02	0.18	−1.10	−1.59	0.16
	PHQ4	Energy	1.67	0.93	0.09	−1.05	0.74	0.25
	PHQ5	Appetite	1.40	1.02	0.21	−1.08	−0.83	0.13
	PHQ6	Guilt	1.53	0.96	0.17	−0.98	0.73	0.27
	PHQ7	Concentration	1.46	1.00	0.17	−1.05	−0.29	0.16
	PHQ8	Motor	1.28	0.99	0.33	−0.90	−0.61	0.18
	PHQ9	Suicide	0.88	0.99	0.88	−0.36	0.23	0.24
SH (2854)	PHQ1	Anhedonia	1.80	0.90	−0.01	−1.09	−0.18	0.32
	PHQ2	Sad Mood	1.52	0.92	0.26	−0.86	1.82	0.41
	PHQ3	Sleep	1.59	1.11	−0.03	−1.35	−1.12	0.18
	PHQ4	Energy	1.89	0.90	−0.08	−1.22	0.56	0.31
	PHQ5	Appetite	1.55	1.05	0.05	−1.22	−1.27	0.17
	PHQ6	Guilt	1.64	0.99	0.02	−1.11	0.10	0.31
	PHQ7	Concentration	1.60	1.04	−0.03	−1.20	−0.94	0.20
	PHQ8	Motor	1.30	1.09	0.33	−1.18	0.37	0.29
	PHQ9	Suicide	0.83	1.02	1.01	−0.21	0.67	0.34
College (830)	PHQ1	Anhedonia	1.50	0.77	0.57	−0.39	0.53	0.28
	PHQ2	Sad Mood	1.35	0.72	0.71	0.26	1.74	0.40
	PHQ3	Sleep	1.33	0.88	0.39	−0.53	−0.56	0.16
	PHQ4	Energy	1.47	0.74	0.73	−0.19	0.87	0.32
	PHQ5	Appetite	1.33	0.88	0.44	−0.47	−1.66	0.11
	PHQ6	Guilt	1.30	0.81	0.49	−0.15	−0.42	0.24
	PHQ7	Concentration	1.44	0.86	0.37	−0.56	−0.74	0.15
	PHQ8	Motor	1.00	0.85	0.67	−0.00	−0.11	0.27
	PHQ9	Suicide	0.61	0.80	1.23	0.86	0.34	0.26
Elderly (353)	PHQ1	Anhedonia	1.49	0.94	0.27	−0.89	−0.94	0.62
	PHQ2	Sad Mood	1.28	0.88	0.52	−0.38	0.82	0.68
	PHQ3	Sleep	1.56	0.97	0.17	−1.04	−0.93	0.56
	PHQ4	Energy	1.60	0.89	0.33	−0.94	0.27	0.66
	PHQ5	Appetite	1.38	0.88	0.37	−0.57	−1.04	0.63
	PHQ6	Guilt	1.24	0.95	0.42	−0.71	2.07	0.68
	PHQ7	Concentration	1.41	0.94	0.32	−0.82	−0.32	0.59
	PHQ8	Motor	1.36	0.93	0.43	−0.69	0.17	0.66
	PHQ9	Suicide	1.01	0.96	0.62	−0.60	−0.11	0.56

Note. JH, Junior high school students. SH, Senior high school students. ^a The values of node strength were standardized z scores from the network.