joint strategic needs assessment foundation profile - JSNA

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Table 120: BMI classification for year R and year 6 boys (row percentages in paired
analysis)
BMI classification
at year R (aged 4-
5 yrs) measured
2001/02
BMI classification in year 6 (aged 10–11) measured 2007/08
Underweight Desirable
weight
Overweight Obese Total
Underweight 10.5 76.2 7.6 5.7 100
Desirable weight 0.6 69.0 15.5 14.9 100
Overweight 0.0 40.0 25.5 34.5 100
Obese 0.0 13.8 18.0 68.3 100
A similar pattern was observed for girls with 9.6% of girls who were of desirable weight
at year R being classified as obese in year 6, compared to 40.3% of those girls who
were overweight in year R and 74.7% of those girls who were obese in year R. The
same conclusion refers to girls as it did boys; whilst there is a strong association
between year R and year 6 weight classifications, children who were overweight or
obese at one particular age may not necessarily be overweight or obese at the other
age. This implies a general approach is necessary, and it is not possible to simply
target overweight and obese year R children in order to reduce obesity levels in year 6
children.
Table 121: BMI classification for year R and year 6 girls (row percentages in paired
analysis)
BMI classification
at year R (aged 4-
5 yrs) measured
2001/02
BMI classification in year 6 (aged 10–11) measured 2007/08
Underweight Desirable
weight
Overweight Obese Total
Underweight 11.9 79.7 5.1 3.4 100
Desirable weight 1.1 76.6 12.7 9.6 100
Overweight 0.0 32.6 27.1 40.3 100
Obese 0.0 12.7 12.7 74.7 100
As mentioned, despite this relatively strong relationship, there is considerable variability
in BMI in year R compared to BMI in year 6 for some children. It is difficult to compare
the actual values of BMI in year R and in year 6 directly due to the different values of
BMI relating to different levels of overweight and obesity at different ages. For instance,
having a BMI of 20.5 between the ages of 4–5 years would be classified as „obese‟
whereas having a BMI of 20.5 at age 10–11 years would be classified as having a
„desirable weight‟ (see Table 410 for BMI classifications for year R and year 6 children).
Figure 101 and Figure 102 illustrate BMI at the two different ages in the same boys and
in the same girls respectively. The figures have not been updated for the most recent
Joint Strategic Needs Assessment Foundation Profile – Hull Health Profile: Release 3. March 2011. 291