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Table 1 Serum 25OHD3 and retinol levels of all participants

From: Nutrition assessment of vitamin A and vitamin D in northeast Chinese population based-on SPE/UPLC/PDA

Participants 25OHD3 (ng/ml) P-value Retinol (ng/ml) P-value
Elementary school students 17.8 ± 7.3 0.000 a 255.5 ± 78.2 0.000 a
Middle school students 15.4 ± 6.1 0.000 b 319.8 ± 113.3 0.000 b
Adults 15.3 ± 5.7 0.000 c 369.1 ± 116.8 0.000 c
Total 16.1 ± 6.7 1.000 d 328.1 ± 117.1 0.000 d
  1. a results of One-way ANOVA for the comparison of elementary school students, middle school students, and adults
  2. b results of One-way ANOVA (Bonferroni correction) for the comparison with elementary school students
  3. c results of One-way ANOVA (Bonferroni correction) for the comparison with elementary school students
  4. d results of One-way ANOVA (Bonferroni correction) for the comparison with middle school students