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Appendix 3: BMI and Waist
Circumference Charts

Birth - 20 yrs UK cross-sectional body mass index reference chart. 2008/1 IDENTIFICATION

Name......................................................... 10 12 yrs 14 16 18 20
38 38
D.O.B. [DDMMYY] //

NHS No. 37 37
36
Mother Height [m] BMI 35 36
Weight [kg] Height [m] BMI 34
33 35
Father 32
Weight [kg] 31
30
Body Mass Index (BMI) 34
Although highly correlated with weight, body mass index [BMI] is not a direct
measure of body fat and rapid changes in BMI can occur in normal childhood 99.6th 33
growth. By itself it should therefore be interpreted with caution. Waist 32
circumference and body type should be evaluated before intervention or referral is
considered. 31

The blue shaded area indicates a healthy BMI range bordered by the international 30
cut-offs for the degrees of overweight and thinness. The Royal College of
Paediatrics & Child Health has stated that severe or progressive obesity should be
referred to a paediatrician before age 2.
Referrals of infants showing signs of concerning overweight/underweight in their
early months [shaded grey] should be based on the 1st year weight charts with
95%/5% thrive lines.

29 2 4 yrs 6 8 29
28
98th

28

27 27

26 26
91st

25 25

Body Mass Index (kg/m2) 24 24

75th

23 23

22 22
50th

21 21

20 25th 20

19 9th 19

18 18

2nd

17 17
0.4th

16 16

15 15

14 14

13 13

12 12

Data: 1990

11 years 11

EDD 2 4 6 8 10 12 14 16 18 20

Manufacture 21 May 12 BMIBI
Body mass index reference curves for the UK, 1990 (Cole TJ, Freeman JV, Preece MA) Arch Dis Child 1995; 73: 25-9
Establishing a standard definition for child overweight and obesity: international survey (Cole TJ, Bellizzi MC, Flegal KM, Dietz WH) BMJ 2000; 320: 1240-3
Body mass index cut-offs to define thinness in children and adolescents: international survey (Cole TJ, Flegal KM, Nicholls D, Jackson AA) BMJ 2007; 335: 194-7