Journal List > Korean J Health Promot > v.16(3) > 1089888

Jung and Cho: Diagnosis of Severe Obesity in Korean Children and Adolescents

Abstract

Backgroud

Although the obesity prevalence in Korean children and adolescents has stabilized since early 2000s, it is noted that severe obesity is increasing. However, no diagnostic criteria to define severe obesity in Korean children and adolescents has not been recommended yet.

Methods

We established two kinds of diagnostic criteria of severe obesity with the 2007 Korean National Growth Charts; 1) body mass index (BMI) criteria 1: BMI≥120% of 95th percentile or 30 kg/m2, whichever is lower, 2) BMI criteria 2: ≥99th percentile. We examined the prevalence of severe obesity among children and adolescents who participated in the Fifth Korea National Health and Nutrition Examination Survey, 2010–2012 based on BMI criteria 1 and 2 as well as percentage-weight-for-height (PWH).

Results

We presented the age- and sex-specific BMI cut-offs of BMI criteria 1 and 2. The prevalence of severe obesity was 1.6% and 1.7% based on BMI criteria 1 and 2, respectively. The prevalence of severe obesity based on PWH was 0.8%, which was lower than the prevalences based on BMI criteria 1 and 2.

Conclusions

Our diagnostic criteria of severe obesity can be utilized in the epidemiological surveys and researches before the recommendation of the formal diagnostic criteria.

References

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Figure 1.
The proportion of mild, moderate and severe obesity in Korean children and adolescents according to three set of different diagnostic criteria.
kjhp-16-174f1.tif
Table 1.
Age- and sex-specific BMI cut-offs to define severe obesity in Korean children and adolescents
Age BMI cut-offs 1a BMI cut-offs 2b
Boys Girls Boys Girls
2 22.98 22.73 20.18 20.15
2.5 22.41 22.18 19.78 19.68
3 22.08 21.83 19.67 19.43
3.5 21.95 21.65 19.82 19.39
4 22.00 21.64 20.18 19.52
4.5 22.20 21.76 20.67 19.78
5 22.53 21.99 21.24 20.16
5.5 22.97 22.33 21.86 20.63
6 23.50 22.75 22.51 21.17
6.5 24.11 23.23 23.20 21.76
7 25.12 24.06 24.29 22.70
8 26.55 25.27 25.78 24.01
9 28.01 26.51 27.25 25.31
10 29.38 27.70 28.62 26.50
11 30.00 (30.60)c 28.79 29.81 27.54
12 30.00 (31.63)c 29.72 30.79 28.37
13 30.00 (32.42)c 30.00 (30.46)c 31.52 28.99
14 30.00 (32.98)c 30.00 (31.00)c 31.99 29.37
15 30.00 (33.32)c 30.00 (31.34)c 32.23 29.54
16 30.00 (33.46)c 30.00 (31.49)c 32.24 29.54
17 30.00 (33.47)c 30.00 (31.49)c 32.08 29.42
18 30.00 (33.41)c 30.00 (31.39)c 31.80 29.26

Abbreviation: BMI, body mass index.

a 120% of 95th BMI percentile or a BMI of 30 kg/m

2 whichever is lower.

b 99th BMI percentile.

c Values in parentheses are 120% of 95th BMI percentile.

Table 2.
Trends in age-standardized prevalence (standard error) of severe obesity in Korean children and adolescents aged 7–18 years
  2001 2005 2007–2009 2010–2012 P for trend
Total          
BMI criteria 1a 1.2 (0.3) 1.9 (0.4) 1.4 (0.2) 1.6 (0.3) 0.681
BMI criteria 2b 1.0 (0.2) 1.2 (0.3) 1.3 (0.2) 1.4 (0.2) 0.417
PWH criteriac 0.8 (0.2) 0.6 (0.2) 0.9 (0.2) 0.9 (0.2) 0.629
Boys          
BMI criteria 1a 1.9 (0.5) 2.3 (0.7) 1.9 (0.4) 1.9 (0.4) 0.625
BMI criteria 2b 1.3 (0.4) 0.7 (0.4) 1.3 (0.3) 1.1 (0.3) 0.691
PWH criteriac 1.2 (0.4) 0.5 (0.2) 1.1 (0.3) 0.9 (0.3) 0.570
Girls          
BMI criteria 1a 0.4 (0.2) 1.4 (0.5) 0.9 (0.2) 1.2 (0.3) 0.143
BMI criteria 2b 0.8 (0.3) 1.8 (0.6) 1.3 (0.3) 1.8 (0.4) 0.127
PWH criteriac 0.3 (0.2) 0.7 (0.3) 0.6 (0.2) 1.0 (0.3) 0.090

Abbreviations: BMI, body mass index; PWH, percentage-weight-for-height.

a BMI≥120% of 95th percentile or 30 kg/m

2 whichever is lower.

b Moderate obesity: BMI≥95th percentile or 25 kg/m

2 whichever is lower to <99th percentile, Severe obesity: ≥99th percentile.

c PWH≥150%.

Table 3.
Age- and sex-specific BMI cut-offs to define very severe obesity in Korean children and adolescents
Age BMI cut-offsa
Boys Girls
2 26.81 26.52
2.5 26.14 25.87
3 25.76 25.46
3.5 25.61 25.26
4 25.67 25.24
4.5 25.90 25.38
5 26.29 25.66
5.5 26.80 26.05
6 27.42 26.54
6.5 28.13 27.11
7 29.30 28.07
8 30.98 29.48
9 32.67 30.92
10 34.28 32.32
11 35.00 (35.70)b 33.59
12 35.00 (36.90)b 34.67
13 35.00 (37.83)b 35.00 (35.54)b
14 35.00 (38.48)b 35.00 (36.17)b
15 35.00 (38.87)b 35.00 (36.56)b
16 35.00 (39.04)b 35.00 (36.74)b
17 35.00 (39.05)b 35.00 (36.74)b
18 35.00 (38.98)b 35.00 (36.62)b

Abbreviation: BMI, body mass index.

a 140% of 95th BMI percentile or a BMI of 35 kg/m

2 whichever is lower.

b Values in parentheses are 140% of 95th BMI percentile.

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