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Table 2 Nutrition assessment of Vitamin A in three age groups

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

Participants Deficiency Marginal deficiency Insufficiency Sufficiency P-value
Elementary school students 3(1.0) 77(25.1) 143(46.6) 84(27.4) 0.000a
Middle school students 0(0) 33(12.0) 103(37.6) 138(50.4) 0.000b
Adults 0(0) 22(3.7) 156(26.0) 422(70.3) 0.000c
Total 3(0.3) 132(11.2) 402(34.0) 644(54.5) 0.000d
  1. Note: all data were shown in n (%); deficiency: < 100 ng/ml; marginal deficiency: 100~ 200 ng/ml; insufficient: 200~ 300 ng/ml; sufficient: ≥ 300 ng/ml
  2. a results of Chi-Square tests for the comparison of elementary school students, middle school students, and adults (the cut-off value of P is 0.05)
  3. b results of Chi-Square tests for the comparison with elementary school students (the cut-off value of P with Bonferroni correction is 0.05/3)
  4. c results of Chi-Square tests for the comparison with elementary school students (the cut-off value of P with Bonferroni correction is 0.05/3)
  5. d results of Chi-Square tests for the comparison with middle school students (the cut-off value of P with Bonferroni correction is 0.05/3)