Table 1.

Mean serum 25-OHD levels in the patients and controls.

Groups	Mean 25-OHD levels (nmol/L)	P
Group 1 (n = 1529)	44.60 ± 18.62
Girls	45.85 ± 18.55	0.18
Boys	44.28 ± 18.65
Patients aged ≥11 years	41.41 ± 18.79	0.014
Patients aged <11 years	45.08 ± 18.57
Group 2 (n = 100)	42.86 ± 19.84	0.037
Control group (n = 100)	48.57 ± 22.36

Values are ± standard deviation. The Student’s t test was used for comparisons. 25-OHD: 25-hydroxyvitamin D.