Table 7.4: Children's BMI, 2018, by age and sex

Base: Aged 2-15 with valid height and weight measurementsa 2018
BMI status (National BMI percentiles) Age Total
2 - 6 7 - 11 12 - 15
% % % %
Male At risk of underweightb 2 1 2 2
Healthy weightc 69 70 68 69
At risk of overweightd 19 9 10 13
At risk of obesitye 11 20 21 17
Outwith healthy rangef 31 30 32 31
Overweight (including obese)g 30 29 31 30
Female At risk of underweightb 1 2 3 2
Healthy weightc 77 72 60 71
At risk of overweightd 10 12 15 12
At risk of obesitye 11 13 21 15
Outwith healthy rangef 23 28 40 29
Overweight (including obese)g 22 26 37 27
All children At risk of underweightb 1 2 2 2
Healthy weightc 73 71 64 70
At risk of overweightd 15 11 12 13
At risk of obesitye 11 17 21 16
Outwith healthy rangef 27 29 36 30
Overweight (including obese)g 26 27 34 29
Unweighted bases Boys 235 261 194 690
Girls 230 223 149 602
All children 465 484 343 1292
Weighted bases Boys 228 251 192 671
Girls 216 255 177 648
All children 444 506 369 1319

a Table only includes children whose BMI was more than 7 standard deviations above or below the norm for their age were excluded from the table
b 'At risk of underweight' = BMI at or below 2nd percentile.
c 'Healthy weight' = BMI above 2nd percentile, below 85th percentile.
d 'At risk of overweight' = BMI at or above 85th percentile, below 95th percentile.
e 'At risk of obesity' = BMI at or above 95th percentile.


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