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Table 2 Comparison of vitamin A levels in children between 2002 and 2012

From: Comparison on the status of vitamin A in 6- to 13- year-old children between 2002 and 2012 in China

Age group (year)

2002

2012

Urban

Rural

Urban

Rural

 

Boys

Girls

Total

Boys

Girls

Total

Boys

Girls

Total

Boys

Girls

Total

6–9

0.11 ± 0.03

0.11 ± 0.03

0.11 ± 0.03

0.09 ± 0.02

0.09 ± 0.03

0.09 ± 0.02

0.14 ± 0.02

0.14 ± 0.03

0.14 ± 0.03

0.12 ± 0.02

0.13 ± 0.03

0.13 ± 0.03

10–13

0.13 ± 0.03

0.13 ± 0.04

0.13 ± 0.04a

0.11 ± 0.03

0.11 ± 0.03

0.11 ± 0.03b

0.15 ± 0.04

0.15 ± 0.03

0.15 ± 0.03c

0.14 ± 0.03

0.14 ± 0.03

0.14 ± 0.04d

Total

0.12 ± 0.03

0.10 ± 0.03

0.14 ± 0.03e

0.13 ± 0.03f

0.11 ± 0.03

0.14 ± 0.03g

  1. aIn urban areas at 2002, 10–13 age group compared to 6–9 age group, t = 6.26 p = 0.000 statistically significant
  2. bIn rural areas at 2002, 10–13 age group compared to6–9 age group, t = 12.06 p = 0.000 statistically significant
  3. cIn urban areas at 2012, 10–13 age group compared to 6–9 age group, t = 2.55 p = 0.0107 statistically significant
  4. dIn rural areas at 2012, 10–13 age group compared to 6–9 age group, t = 4.33 p = 0.000 statistically significant
  5. eIn urban areas at 2012 compared to urban in 2002, t = 13.21 p = 0.000 statistically significant
  6. fIn rural areas at 2012compared to rural in 2002, t = 27.96 p = 0.000 statistically significant
  7. gcompared to 2002, t = 39.26 p = 0.000 statistically significant