Table 1.

Baseline Characteristics

Characteristics		Male		Female
		N	%	N	%
Age Group	10–39 years	11,881	34.18	9240	24.74
	40–59 years	10,715	30.83	11,270	30.18
	60- years	12,162	34.99	16,834	45.08
Education Level	Primary schools and below	21,968	63.20	27,767	74.35
	Junior/senior high school	10,205	29.36	7912	21.19
	Junior college and above	2585	7.44	1665	4.46
Urban and rural areas	Urban	3771	10.85	3336	8.93
	Rural	30,987	89.15	34,008	91.07
Family history	No	27,663	79.59	31,103	83.29
	Yes	7095	20.41	6241	16.71
Professional	Farmers	29,129	83.81	32,420	86.81
	Workers and technicians	2208	6.35	2152	5.76
	Laid off/unemployed/retired	3421	9.84	2772	7.42
Marriage status	Unmarried	15,740	45.28	3310	8.86
	Married	15,706	45.19	30,707	82.23
	Divorced/widowed	3312	9.53	3327	8.91
Follow-up time	0–2 years	33,762	97.13	36,228	97.01
	2–4 years	32,337	93.03	35,269	94.44
	4–6 years	30,421	87.52	33,643	90.09
	6–8 years	28,643	82.41	31,880	85.37

Notes: The data of the study cohort were obtained from the Mental Disorders Information System of Shandong Province.