The Level of Vitamin D in Children and Adolescents with Nonalcoholic Fatty Liver Disease: A Meta-Analysis

Table 1

The best estimating formula for an unknown distribution.

Sample size (N)	Mean ()	Standard deviation (SD)
N ≤ 15
15 < N ≤ 25	Median
25 < N ≤ 70	Median	OR
N >70	Median

m: values of median; a: low end of range; b: high end of range; Q₇₅: upper four quartile; Q₂₅: lower four quartile.