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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