Table 1 Main characteristics of the 22 studies included in the final meta-analysis
From: Meta-analysis of the association of HLA-DRB1 with rheumatoid arthritis in Chinese populations
Author(reference) | Year | Region | Source of cases | Source of controls | Detection methods | Number of cases | Number of controls | Quality score |
|---|---|---|---|---|---|---|---|---|
Ye SX [13] | 1989 | Liaoning | Hospital-based | Population-based | NS | 39 | 100 | 22 |
Molkentin, J [14] | 1993 | Shanghai | Hospital-based | Population-based | PCR-SSP | 23 | 21 | 26 |
Zhu NS [15] | 1994 | Shanghai | Hospital-based | Population-based | PCR-RFLP | 95 | 130 | 24 |
Wang BL [16] | 1996 | Anhui | Hospital-based | Population-based | PCR-SSP | 30 | 30 | 17 |
Xiao Z [17] | 1997 | Inner Mongolia | Hospital-based | Population-based | NS | 41 | 50 | 16 |
Zhao Y [18] | 1997 | Beijing | Hospital-based | Population-based | PCR-SSP | 86 | 106 | 21 |
Gu JR [19] | 1998 | Guangdong | Hospital-based | Population-based | PCR-SSP | 47 | 108 | 23 |
Yuan GH [8] | 1998 | Beijing | Hospital-based | Population-based | PCR-RFLP | 35 | 100 | 23 |
Zhang JQ [20] | 1999 | Hebei | Hospital-based | Population-based | PCR-SSP | 180 | 100 | 25 |
Liu QH [6] | 2000 | Hubei | Hospital-based | Population-based | PCR-SSP | 78 | 126 | 26 |
Wu H [21] | 2001 | Hunan | Hospital-based | Population-based | PCR-SSP | 105 | 76 | 32 |
Lin L[22] | 2001 | Guangdong | Hospital-based | Population-based | PCR-SSP | 117 | 100 | 21 |
Liu YJ [23] | 2002 | Guizhou | Hospital-based | Population-based | PCR-SSP | 35 | 51 | 22 |
Li XF [9] | 2003 | Shandong | Hospital-based | Population-based | PCR-SSP | 132 | 130 | 31 |
Zhang SL[24] | 2003 | Fujian | Hospital-based | Population-based | PCR-SSP | 98 | 100 | 21 |
Su Y [25] | 2004 | Beijing | Hospital-based | Hospital-based | PCR-SSP | 136 | 79 | 24 |
Duan JM [26] | 2005 | Anhui | Hospital-based | Population-based | PCR-SSP | 25 | 77 | 23 |
Zhang HW [7] | 2005 | Guangdong | Hospital-based | Population-based | PCR-SSP | 22 | 31 | 22 |
Chen CP [27] | 2010 | Shanxi | Hospital-based | Population-based | PCR-SSP | 42 | 14 | 21 |
Wang CF [28] | 2010 | Gansu | Hospital-based | Population-based | PCR-SSP | 27 | 46 | 21 |
Chang ZF [29] | 2012 | Inner Mongolia | Hospital-based | Population-based | PCR-SSP | 140 | 100 | 23 |
Shi YM [30] | 2012 | Xinjiang | Hospital-based | Population-based | PCR-SSP | 157 | 118 | 21 |