Nationwide incidence of VCI using random-efects meta-analysis and subgroup meta-analysis
Variable No.of articles No.of participants No.of cases Prevalence% tau Subgroup Diference
Pooled analysis 10 31022 302 1.2 0.0089 NA
Subgroup
Survey period
Overall 10 31022 302 1.2 0.0089 0.1359
<1990 3 3985 69 1.58 0.0125
1990~1999 4 17963 121 0.62 0.0016
>1999 3 9074 112 1.71 0.0115
Diagnosis of VCI
Overall 10 31022 302 1.2 0.0089 0.2179
Criteria 1 5 20846 217 1.43 0.0091
Criteria 2 2 2294 16 0.61 0.0028
Criteria 3 0 0 0 0 0
Criteria 4 3 7882 69 1.3 0.0133
Study quality
Oerall 10 31022 302 1.2 0.0089 0.0578
Low quality 4 20741 156 1.05 0.0095
Medium quality 1 7664 56 2.14 0
High quality 5 31022 90 1.16 0.0098
Note:
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