Table 2 Serum concentration of 25(OH)D among children and adolescents stratified by gender and living area.

From: Sociodemographic disparity in the nutritional status among children and adolescents in Zhejiang Province

Age (years)* Male (25(OH)D: mg/L) Female (25(OH)D: mg/L) Z P value Urban area (25(OH)D: mg/L) Rural area (25(OH)D: mg/L) Z P value
N Median 25% 75% N Median 25% 75% N Median 25% 75% N Median 25% 75%
6 93 28.25 23.50 32.96 87 25.62 21.65 30.49 −1.732 0.083 87 25.55 22.77 31.36 93 26.75 22.05 32.40 0.468 0.64
7 117 24.49 20.01 29.93 125 24.25 20.07 30.51 −0.302 0.742 114 24.98 18.88 30.01 128 24.19 20.48 30.16 −0.235 0.815
8 138 24.99 20.21 29.43 122 23.50 19.31 27.80 −1.41 0.158 131 25.49 20.31 29.41 129 23.43 19.46 28.26 −1.643 0.1
9 137 23.28 19.55 28.39 127 23.31 19.82 28.40 0.315 0.753 128 22.21 18.82 26.98 136 25.22 20.23 29.80 2.985 0.000
10 125 24.92 20.20 30.23 132 22.15 17.77 26.55 −2.853 0.004 139 22.33 18.14 27.03 118 24.88 19.01 29.09 1.719 0.086
11 128 23.02 20.28 28.43 146 19.44 16.45 25.02 −4.821 0.000 129 20.93 17.16 25.74 145 21.65 18.34 28.61 1.715 0.086
12 152 21.13 16.84 27.27 134 19.02 14.88 24.15 −2.503 0.012 148 19.53 15.30 25.56 138 20.40 16.80 25.20 0.715 0.475
13 133 22.42 17.64 27.64 133 20.32 15.26 24.17 −2.687 0.007 141 20.32 15.35 26.18 125 21.91 17.47 26.82 1.975 0.048
14 40 19.38 16.46 25.53 40 23.03 15.64 25.55 0.322 0.747 35 18.15 15.36 27.80 45 20.94 17.18 25.47 0.679 0.497
15 88 22.10 15.61 28.95 101 19.09 16.12 23.86 −2.181 0.029 94 18.21 13.95 23.86 95 22.06 18.27 28.97 4.448 0.000
16 121 22.34 18.20 27.25 117 19.45 15.59 24.17 −3.076 0.002 104 19.05 14.82 23.10 134 22.17 18.21 27.51 4.054 0.000
17 43 18.77 13.40 23.10 39 17.08 13.42 23.02 −0.659 0.51 40 13.49 11.01 20.42 42 20.91 17.77 24.97 4.467 0.000
Total 1315 23.23 18.76 29 1303 21.43 17.23 26.45 −6.503 0.000 1290 21.62 17 26.92 1328 22.89 18.83 28.47 5.478 0.000
  1. P values are for the comparison of serum concentration of 25(OH)D between genders and between living areas.
  2. Bold values indicate statistically significant P values.
  3. For multiple comparisons among different age, the P value is 0.00074627 after Bonferroni correction.
  4. An asterisk (*) denotes significant difference on Serum concentration of 25(OH)D among different age (H = 198.569, P < 0.0007).
  5. 25(OH)D concentration of 25‐hydroxyvitamin D.