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. 2013 Sep 3;9:24. doi: 10.1186/1746-160X-9-24

Table 1.

Age distribution among the test groups

 
 Group
 Total
    II/1 (n = 50) II (n = 55) II/2 (n = 39)  
Age
 Mean
 10.8
 11.5
 12.6
 11.6
 
 Median
 10.5
 11.5
 12.5
 11.5
 
 Standard deviation
 1.5
 1.6
 1.8
 1.8
  Minimum - maximum 9.0 – 14.5 9.0 – 15.5 9.5 – 16.5 9.0 – 16.5