Table 2.
Basic characteristics of studies of Vitamin D levels in patients with CD before and after GFD
| Author | Year | Country | CD pre-treatment | CD post-treatment | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| N | Mean | SD | N | Mean | SD | |||||
| Kavak | 2003 | Turkey | 34 | 75.25 | 39.75 | 28 | 79.88 | 41.25 | ||
| Margoni | 2012 | Greece | 45 | 62 | 26.25 | 36 | 73.25 | 43.25 | ||
| Mager | 2012 | Canada | 34 | 77 | 22 | 31 | 88 | 27 | ||
| Volkan | 2018 | Turkey | 26 | 44.7 | 22.98 | 21 | 49.4 | 26.68 | ||
| Drabin ´ska | 2018 | Poland | 16 | 47.75 | 7.09 | 16 | 55.28 | 11.76 | ||
| Bayrak | 2020 | Turkey | 228 | 57.1 | 85.93 | 192 | 61.28 | 71.83 | ||
| Moya | 2020 | USA | 155 | 75.25 | 30 | 122 | 76.5 | 28.5 | ||
| Verma | 2022 | India | 60 | 37.13 | 13.48 | 60 | 45.55 | 14.18 | ||
| Bodas | 2023 | Spain | 26 | 65.43 | 31.78 | 26 | 75.93 | 47.88 | ||
CD: celiac disease; GFD: gluten free diet; SD: standard deviation