Table 1.

Methodology of the 2 Studies that Compared Obese to Non-Obese Children and Adolescents in Meta-Analysis I.

Selection criteria	Rajakumar et al9	Castaneda et al10
Type of study	Open labeled non-randomized	Open labeled non-randomized
Age of participants	6-10 years old	12-18 years old
Number of intervention participants	21 obese children all completed	27 obese adolescents (only 18 were included)
Criteria for intervention participants	Obese: BMI > 95th percentile)	Obese: BMI ≥ 95th percentile
Number and type of control groups	20 matching non-obese (BMI 5th-75th percentile for age): all completed the study	22 matched non-obese (BMI 5th-85th percentile): only 18 completed
Gender of intervention groups	6 females in the obese group and 8 in the non-obese group	44.4% (8) females in both groups
Intervention dosage	400 IU vitamin D daily for a month	Vitamin D3 (2000 IU/day) orally for 12 weeks