Table 4 Subgroup meta-analyses on the prevalence of MCI
Subgroup | Included studies | Study participants (sample size) | Random-effect Model | Heterogeneity | ||
|---|---|---|---|---|---|---|
MCI Prevalence (95% CI) | p | I2 | Ph | |||
Age (Years) | ||||||
55–59 | 3 | 5951 | 0.076(0.025–0.226) | < 0.001 | 99.2% | 0.922 |
60–69 | 24 | 23,095 | 0.095(0.074–0.121) | < 0.001 | 97.8% | 0.356 |
70–79 | 25 | 22,902 | 0.146 (0.124–0.171) | < 0.001 | 96.6% | 0.153 |
≥ 80 | 25 | 9397 | 0.236 (0.204–0.274) | < 0.001 | 93.5% | 0.122 |
Sex | ||||||
Men | 34 | 45,609 | 0.115 (0.097–0.136) | < 0.001 | 97.4% | 0.233 |
Women | 34 | 36,027 | 0.138 (0.117–0.163) | < 0.001 | 98.3% | 0.224 |
Residency | ||||||
Urban | 32 | 71,801 | 0.114 (0.098–0.132) | < 0.001 | 98.4% | 0.174 |
Rural | 12 | 25,137 | 0.136 (0.106–0.176) | < 0.001 | 98.8% | 0.193 |
Living status | ||||||
With family | 10 | 13,941 | 0.141 (0.110–0.182) | < 0.001 | 97.6% | 0.157 |
alone | 10 | 3518 | 0.182 (0.136–0.244) | < 0.001 | 95.0% | 0.206 |
Education attainment | ||||||
< Primary school | 18 | 10,974 | 0.172 (0.122–0.243) | < 0.001 | 98.3% | 0.540 |
Primary school | 18 | 14,502 | 0.120 (0.083–0.174) | < 0.001 | 98.5% | 0.623 |
Middle school | 21 | 11,367 | 0.091 (0.072–0.115) | < 0.001 | 94.3% | 0.418 |
≥ High school | 21 | 9568 | 0.063 (0.046–0.085) | < 0.001 | 94.2% | 0.515 |
Diagnostic criteria | ||||||
Peterson | 25 | 67,267 | 0.129 (0.107–0.154) | < 0.001 | 98.9% | 0.209 |
DSM-IV | 9 | 21,699 | 0.135 (0.097–0.188) | < 0.001 | 99.0% | 0.257 |
NIA-AA | 2 | 11,327 | 0.103 (0.029–0.369) | < 0.001 | 98.8% | 0.833 |
Study period | ||||||
< 2005 | 4 | 15,857 | 0.037 (0.016–0.087) | < 0.001 | 99.2% | 0.769 |
≥ 2005 | 30 | 90,510 | 0.141 (0.124–0.160) | < 0.001 | 98.6% | 0.142 |