Table 2 Pooled prevalence,95% CI, and heterogeneity level of PLTC by subgroup analysis
Subgroup | Number of studies | Sample size | Number of PLTC | Prevalence of PLTC (95% CI) | I2,% | P-value | Weight % |
|---|---|---|---|---|---|---|---|
Diagnosis criteria | |||||||
 WHO | 38 | 1949688 | 183844 | 6.88 (5.09–8.91) | 99.96 | 0.00 | 86.18 |
 CDC/ICD9-10 | 6 | 2208975 | 39399 | 2.19 (1.89–2.50) | 99.41 | 0.00 | 13.82 |
Country income level | |||||||
 Low income | 5 | 20002 | 2637 | 13.44 (11.88–15.00) | 89.90 | 0.00 | 11.08 |
 Low-middle | 12 | 215991 | 9160 | 7.42 ( 5.99–8.86) | 99.71 | 0.00 | 29.21 |
 Upper-middle | 14 | 467611 | 35388 | 6.35 (4.21–8.50) | 99.92 | 0.00 | 32.09 |
 High income | 9 | 2418562 | 43553 | 2.67 (2.34–2.99) | 99.57 | 0.00 | 20.71 |
Publication Year | |||||||
 2013–2017 | 22 | 1225848 | 148495 | 8.57 (5.79–11.34) | 99.97 | 0.00 | 49.91 |
 2018–2022 | 22 | 2932815 | 74748 | 5.31 (4.71–5.91) | 99.89 | 0.00 | 50.09 |
Study sample size | |||||||
 ≤ 20000 | 19 | 92845 | 8099 | 9.86 (8.00–11.73) | 99.22 | 0.00 | 42.43 |
 > 20000 | 25 | 4065818 | 215144 | 4.27 (3.56–6.18) | 99.98 | 0.00 | 57.57 |