Fig. 7From: Implications of standardization of serum 25-hydroxyvitamin D data for the evaluation of vitamin D status in Germany, including a temporal analysis25(OH)D categories based on original and standardized serum 25(OH)D levels of GNHIES98, DEGS1 and KiGGS. 25(OH)D, Serum 25-hydroxyvitamin D; GNHIES98, German National Health Interview and Examination Survey 1998; DEGS1, German Health Interview and Examination Survey for Adults; KiGGS, German Health Interview and Examination Survey for Children and AdolescentsBack to article page