| Studies (N) | Participations (N) | ARLD (n) | Prevalence (%, 95%CI) | I2** | P |
---|---|---|---|---|---|---|
By country area | ||||||
 Overall | 99 | 198,423,289 | 1,806,506 | 4.8% (4.1–5.6) | 99.998 |  < 0.001 |
 Portugal | 1 | 773,187 | 7751 | 1.0% (0.9–1.1) | - |  < 0.001 |
 Canada | 1 | 690,401 | 7112 | 1.0% (1.0–1.1) | - |  < 0.001 |
 Iceland | 1 | 16,000 | 317 | 1.0% (0.8–1.2) | - |  < 0.001 |
 Denmark | 3 | 5,531,764 | 11,260 | 1.2% (0.1–3.4) | 99.990 | 0.046 |
 France | 2 | 261,248 | 3663 | 1.4% (1.3–1.4) | - |  < 0.001 |
 South Korea | 4 | 48,933,410 | 41,262 | 2.3% (0.1–7.7) | 99.934 |  < 0.001 |
 China | 54 | 2,976,478 | 29,681 | 3.9% (2.9–5.1) | 99.902 |  < 0.001 |
 USA | 17 | 137,929,285 | 1,664,682 | 5.0% (2.9–7.6) | 100 |  < 0.001 |
 UK | 5 | 1,187,539 | 23,457 | 7.2% (3.0–13.0) | 99.989 |  < 0.001 |
 Japan | 6 | 88,043 | 12,318 | 10.4% (3.2–20.9) | 99.931 |  < 0.001 |
 Uganda | 1 | 8099 | 888 | 11.0% (7.7–10.2) |  |  < 0.001 |
 India | 2 | 3229 | 422 | 11.8% (10.7–12.9) | - |  < 0.001 |
 Sweden | 1 | 4611 | 645 | 14.0% (13.0–15.0) | - |  < 0.001 |
 Italy | 3 | 19,995 | 3206 | 16.1% (1.2–43.3) | - | 0.009 |
By regions | ||||||
 Asia | 66 | 52,001,160 | 83,683 | 4.5% (4.0–5.5) | 99.950 |  < 0.001 |
 North America | 17 | 138,619,686 | 1,671,794 | 4.7% (2.7–7.1) | 100 |  < 0.001 |
 Europe | 16 | 7,794,344 | 50,141 | 5.4% (3.9–7.1) | 99.980 |  < 0.001 |
Province of Chinaa | ||||||
 Overall | 54 | 2,976,478 | 29,681 | 3.9% (2.9–5.1) | 99.903 |  < 0.001 |
 Sichuan | 5 | 27,775 | 652 | 1.8% (1.1–2.6) | 94.661 |  < 0.001 |
 Beijing | 4 | 2,660,342 | 16,051 | 1.9% (0.1–5.5) | 99.989 | 0.007 |
 Guangdong | 5 | 27,835 | 878 | 1.9% (0.7–3.6) | 98.563 | 0.001 |
 Jiangsu | 2 | 8453 | 190 | 2.2% (1.9–2.5) | - |  < 0.001 |
 Shanghai | 2 | 6192 | 192 | 2.9% (2.5–3.3) | - |  < 0.001 |
 Gansu | 2 | 50,342 | 1627 | 3.2% (3.1–3.4) | - |  < 0.001 |
 Shaanxi | 3 | 16,572 | 652 | 3.5% (1.7–6.0) | - |  < 0.001 |
 Guizhou | 2 | 20,229 | 776 | 3.8% (3.6–4.1) | - |  < 0.001 |
 Zhejiang | 7 | 37,375 | 1904 | 4.2% (1.8–7.5) | 99.410 |  < 0.001 |
 Henan | 2 | 5648 | 241 | 4.2% (3.7–4.7) | - |  < 0.001 |
 Hunan | 2 | 19,696 | 836 | 4.2% (3.9–4.5) | - |  < 0.001 |
 Jilin | 4 | 14,462 | 756 | 4.7% (3.1–6.7) | 95.180 |  < 0.001 |
 Heilongjiang | 1 | 1203 | 58 | 4.8% (3.7–6.2) | - |  < 0.001 |
 Taiwan | 1 | 46,565 | 2249 | 4.8% (4.6–5.0) | - |  < 0.001 |
 Tibet | 1 | 2178 | 106 | 4.9% (4.0–5.9) | - |  < 0.001 |
 Liaoning | 1 | 7420 | 368 | 5.0% (4.5–5.5) | - |  < 0.001 |
 Yunnan | 2 | 2190 | 159 | 6.8% (5.8–7.9) | - |  < 0.001 |
 Anhui | 2 | 6273 | 581 | 8.0% (7.3–8.7) | - |  < 0.001 |
 Shandong | 2 | 8495 | 692 | 8.1% (7.5–8.7) | - |  < 0.001 |
 Hebei | 1 | 866 | 85 | 9.8% (7.9–12.0) | - |  < 0.001 |
 Xinjiang | 1 | 2567 | 274 | 10.7% (9.5–11.9) |  |  < 0.001 |
 Northeast Chinab | 5 | 22,851 | 1171 | 4.8% (3.7–6.0) | 98.617 |  < 0.001 |
 Northwest Chinac | 8 | 73,281 | 2907 | 5.9% (4.2–7.9) | 99.739 |  < 0.001 |
By sex | 58 | 195,227,050 | 1,265,327 | Â | 99.993 | Â |
 Male |  |  | 924,436 | 2.9% (2.4–3.5) |  |  < 0.001 |
 Female |  |  | 340,891 | 0.5% (0.4–0.7) |  |  < 0.001 |
By study period | 67 | 122,004,134 | 598,920 | Â | Â | Â |
 2000–2010 | 49 | 119,422,376 | 509,074 | 4.6% (4.2–5.0) | 99.987 |  < 0.001 |
 2011–2021 | 18 | 2,581,758 | 89,846 | 5.6% (2.4–10.1) | 99.993 |  < 0.001 |