Quality criteria Assessment Score Maximum score
Protocol (was there a protocol?) Yes 1 1
No 0
Sampling method (was it representative
of a target subnational population?)
Yes 1 1
No 0
Case ascertainment (was it based on standard
diagnostic criteria or measurement of cognitive impairment,
other clinical criteria, informant interviews, or not reported?)
Standard diagnostic criteria 3 3
Measurement of cognition
or other clinical criteria
Informant interviews 1
Not-reported 0
Total (high (4,5), moderate (2,3), or low quality (0-1)) 5