Table 1.

Characteristics of studies included in this meta-analysis

Authors, publication year	Study design	Country/continent	No of participants	No of dementia cases	Sex	Age range or mean (years)	Follow-up duration (years)	Schizophrenia assessment	Dementia ascertainment	Adjustment for confounders
Kørner et al 200953	Prospective	Denmark/Europe	20,328	355	M/F	≥40	3	ICD-10 codes	ICD-10 codes	Gender, age, and calendar time
Ku et al 201650	Prospective	Korea/Asia	275,510	8,188	M/F	<65, ≥65	5	ICD-10 codes	ICD-10 codes	Charlson Comorbidity Index and underlying comorbidities
Ribe et al 201551	Prospective	Denmark/Europe	2,845,440	136,012	M/F	≥50	18	ICD-8 and ICD-10 codes	ICD-8 and ICD-10 codes	Age, sex, and calendar period
Rohde et al 201649	Prospective	Denmark/Europe	1,839,006	20,623	M/F	≥50	3–33	ICD-8 and ICD-10 codes	ICD-8 and ICD-10 codes	Diabetes mellitus, myocardial infarction, congestive heart failure, and peripheral vascular disease
Tapiainen et al 201748	Retrospective	Finland/Europe	55,896	27,948	M/F	79.7	5	ICD-8, ICD-9, and ICD-10 codes	ICD-8, ICD-9, and ICD-10 codes	Modified Charlson Comorbidity Index
Zilkens et al 201452	Retrospective	Australia/Oceania	27,136	13,568	M/F	78.7	20	ICD-9 and ICD-10 codes	ICD-9 and ICD-10 codes	Diabetes, heart disease, cerebrovascular disease, and smoking risk factors