Table 1 Characteristics of the included studies
From: Association between serum vitamin D level and Graves’ disease: a systematic review and meta-analysis
No. | First Author | Year | Country | Study Year | Patient Age (Mean ± SD) | Detection Index | Assay Method | Sample Size (Case/Control) | Quality Score |
|---|---|---|---|---|---|---|---|---|---|
1 | Feng [24] | 2020 | China | 2017–2019 | 10.85 ± 2.79 | 25(OH)D | ELISA | 54/30 | 7 |
2 | Heisel [25] | 2020 | USA | 2016–2018 | 50.1 | 25(OH)D | NA | 89/356 | 8 |
3 | Arun K [26] | 2019 | India | 2015–2016 | 35.25 ± 9.70 | 25(OH)D | ECLIA | 84/42 | 8 |
4 | Tereza [27] | 2018 | Sweden | 2017 | NA | NA | HPLC | 292/2305 | 7 |
5 | Ke [28] | 2017 | China | 2015–2016 | 39.79 ± 1.73 | 25(OH)D | ECLA | 51/51 | 8 |
6 | Li [29] | 2015 | China | 2010 | 39.00 ± 8.06 | 25(OH)D | RIA (25(OH)D-Ria-CT) | 32/60 | 9 |
7 | Ma [30] | 2015 | China | 2012–2013 | 40.04 ± 15.24 | 25(OH)D | ECLA | 70/70 | 8 |
8 | Zhang [31] | 2015 | China | 2012 | 31.7 ± 10.32 | 25(OH)D | ELISA | 70/70 | 9 |
9 | Yasuda [32] | 2013 | Japan | 2011 | 38 ± 7 | 25(OH)D3 | CPBA | 36/49 | 7 |
10 | Jyotsna [33] | 2012 | India | 2006–2008 | 36.33 ± 11.15 | 25(OH)D | RIA | 80/80 | 7 |
11 | Czernobilsky [34] | 1988 | Germany | 1988 | NA | 25(OH)D3 | CPBA | 38/60 | 9 |
12 | Bouillon [35] | 1980 | Belgium | 1979 | 41 | 25(OH)D3 | CPBA | 23/81 | 7 |