Author | Study design | Country of study | Age of participants | Study size/comparison | Dose of vitamin D | Loss to follow-up | |
Vitamin D | Placebo | ||||||
Ahmadi et al., 2013 | RCT | Iran (Isfahan) | Older than 20 years | 30 | 30 | 50,000 IU/week | 9 |
Al-Zahrani, 2014 | RCT | Saudi Arabia | Not specified | 100 | 100 | 45,000 IU/week for two months, and a single dose of 45,000 IU in the last month | 17 |
Breslavsky et al., 2013 | RCT | Not specified | Mean age of 66.8 | 24 | 23 | 1000 IU/day for 12 months | 15 |
Elkassaby et al., 2014 | RCT | Australia | 30 - 60 | 26 | 24 | 6000 IU/day | Not specified |
Ghavamzadeh et al., 2013 | RCT | Iran | Mean age of 49.28 | 26 | 25 | 400 IU/day of vitamin D3 | Not specified |
Heshmat et al., 2012 | RCT | Iran (Tehran) | 37 - 79 | 21 | 21 | Single intramuscular injection of 300,000 IU of vitamin D3 | Not specified |
Jehle et al., 2014 | RCT | Switzerland | >16 | 29 | 26 | 300,000 IU of vitamin D3 | Not specified |
Jorde et al.,2009 | RCT | North Norway | 21 - 76 | 16 | 16 | 40,000 IU/week cholecalciferol | 4 |
Kampmann, 2014 | RCT | Denmark | >18 | 7 | 8 | 11,200 IU/day cholecalciferol for two weeks and 5600 IU/day for 10 weeks | 1 |
Kota et al., 2012 | RCT | India (Hyderabad) | 22 - 63 | 15 | 15 | Not specified | Not specified |
Neyestani et al., 2012 | RCT |
| 30 - 60 | 30 | 30 | 500 IU/day vitamin D and 150 mg calcium/250ml/day | Not specified |
Ryu et al., 2013 | RCT | South Korea | Not specified | 79 | 79 | 1000 IU cholecalciferol daily combined with 100mg of elemental calcium twice daily | 29 |
Shar-Bidar et al., 2011 | RCT | Iran (Tehran) | 29 - 67 | 50 | 50 | Vitamin D fortified yoghurt (170 mg calcium and 150 IU vitamin D) | Not specified |
Strobel et al., 2014 | RCT | Germany | 30 - 78 | 39 | 33 | 20 drops of Vigantol oil/ week (1904 IU/day) | 14 |
Sugden et al., 2007 | RCT | Scotland | Mean age of 64.2 | 17 | 17 | A single dose of 100,000 IU vitamin D2 | 9 |
Thethi et al., 2015 | RCT | USA | 18 - 70 | 30 | 30 | 1 mcg paricalcitol | 5 |
Yousefi Rad et al., 2015 | RCT | Iran | 30 - 60 | 28 | 30 | 4000 IU/day | 7 |