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Table 2 Comparison of serum 25(OH)D levels between seasons, M (P25 ~ P75)

From: The establishment of serum 25-hydroxyvitamin D reference intervals in children aged 0–14 years in Zigong area, China

Season Number of cases 25(OH)D (ng/ml)
Spring 598 48.10 (26.58 ~ 73.65)
Summer 526 57.25 (33.50 ~ 80.03)
Autumn 347 63.40 (35.90 ~ 85.00)
Winter 288 43.35 (26.43 ~ 71.68)
Z value   43.082
P value   0.000