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Table 3 Paired comparison of serum 25(OH)D by season

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

Season-Season Test statistics Standard error Standard test statistics P value Adjusted P value
Winter-Spring 33.510 36.431 0.920 0.358 1.000
Winter-Summer 149.602 37.232 4.018 0.000 0.000
Winter-Autumn 211.384 40.488 5.221 0.000 0.000
Spring–Summer -116.092 30.362 -3.824 0.000 0.001
Spring–Autumn -177.875 34.277 -5.189 0.000 0.000
Summer-Autumn -61.782 35.127 -1.759 0.079 0.472