Table 2 Serum levels of 25-hydroxyvitamin D in randomized trials with Vitamin D supplements
Trial | Mean serum 25-hydroxyvitamin D3 (nmol/L) | |||
|---|---|---|---|---|
| Â | Intervention group | Control group | ||
| Â | Initial levels | Achieved levels | Initial levels | Achieved levels |
Ljunghall et al. (1987) | 75.5 | 85.7 | 79.6 | 110.2 |
Pfeifer et al. (2001) | 25.65 | 64.84 | 24.63 | 44.36 |
Nagpal et al. (2009) | 36.5 | 71.6 | 30.0 | 30.6 |
Zittermann et al. (2009) | 30.0 | 85.5 | 30.3 | 42.0 |
Jorde et al. (a). (2010) | 56.7 | 99.5 | 58.8 | 57.2 |
Jorde et al. (b). (2010) | 58.7 | 138.0 | 58.8 | 57.2 |
Witham et al. (a). (2010) | 41.0 | 63.0 | 45.0 | 54.0 |
Witham et al. (b). (2010) | 48.0 | 79.0 | 45.0 | 54.0 |
Witham et al. (2010) | 38.7 | 51.0 | 37.8 | 40.0 |
Maki et al. (2011) | 64.4 | 76.1 | 67.9 | 66.7 |