| Type | Continent | Country | Antigen | Positive rate | Reference |
| RF | Europe | UK | IgG-Fc | 13-72% | [91, 135] | Netherlands | 56.9-67% | [81, 90, 136] | Sweden | 55-67.8% | [89, 120] | Europe | 75% | [137] | France | 80.2% | [138] | Poland | 68.6% | [97] | Italy | 41.3-95% | [61, 90, 127, 139, 140] | Spain | 43.2-67.5% | [90, 98, 99] | North America | USA | 62.1-77% | [103, 104] | Canada | 57.7% | [106] | South America | Brazil | 63% | [107] | Asia | China | 71.4-76.9% | [108, 109] | Sri Lanka | 69% | [116] | Iran | 82.7% | [141] | Taiwan | 66.7% | [142] | Japan | 68.1-87.9% | [111, 113, 143–145] | Bangladesh | 94.23% | [110] | Thailand | 73.1% | [114] | cRF (IgA, IgG, IgM) | Africa | Africa | 87% | [117] | IgM-RF | Europe | Denmark | 55.6% | [92] | Netherlands | 21-75% | [84, 93, 94, 122–125] | France | 83.3% | [95] | Hungary | 70.6% | [126] | Italy | 76.5% | [61] | Rome | 65.3-68% | [101, 102] | Austria | 78.6% | [96] | Belgium | 88.7% | [51] | Spain | 60% | [79, 100] | Sweden | 59% | [94] | Asia | Israel | 80% | [115] | Japan | 86% | [112] | South America | Chile | 90% | [146] | IgG RF | Europe | Italy | 59.1% | [61] | Austria | 78.6% | [96] | Netherlands | 24% | [122] | IgA-RF | Europe | Italy | 61.4% | [61] | Austria | 73.8% | [96] | Netherlands | 33-60% | [122, 123] |
| Anti-GPI antibodies | Europe | France | GPI | 28.4-45·4% | [76] | North America | USA | 15-49% | [77, 147] | Asia | Japan | 12-18.5% | [113, 143] | China | 75.0% | [109] |
| Anti-CarP antibodies | Europe | Netherlands | CarP | 10-49.2% | [81, 84, 90, 94, 123–125] | Sweden | 26-42.2% | [79, 90, 94, 98–100, 121] | Poland | 29.4% | [97] | Rome | 34.4-38% | [101, 102] | Italy | 10% | [90] | North America | USA | 47% | [90] | Canada | 38.2% | [148] | Asia | India | 41.5% | [148] |
| Antinuclear antibody | Europe | Denmark | Nuclear antigens | 19.4% | [92] | France | 44.4% | [95] |
| Antikeratin antibodies | Asia | China | Keratin | 48.2% | [109] |
| Anti-hnRNP/RA33 | Europe | Poland | hnRNP/RA33 | 37.3% | [97] | Asia | China | 7.3-44.7% | [149] |
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