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. 2012 Jul 23;12:104. doi: 10.1186/1471-2431-12-104

Table 1.

The risk of obesity risk traits1in 2181 infants

  UK-WHO charts UK90 reference charts Relative Risk (95% Confidence Interval)
Overweight (%)
  
  
  
1 month
 2.2
 2.5
 0.889 (0.605, 1.305)
2 months
 1.7
 2.8
 0.607* (0.405, 0.909)
3 months
 2.4
 3.2
 0.768 (0.540, 1.093)
4 months
 3.3
 3.4
 0.959 (0.697, 1.321)
5 months
 3.9
 3.5
 1.132 (0.836, 1.532)
6 months
 4.9
 3.4
 1.427* (1.068, 1.905)
7 months
 6.7
 4.0
 1.670* (1.291, 2.161)
8 months
 9.0
 4.9
 1.849* (1.471, 2.324)
9 months
 11.5
 6.0
 1.931* (1.576, 2.366)
10 months
 14.2
 7.3
 1.938* (1.616, 2.323)
11 months
 17.2
 9.0
 1.909* (1.623, 2.244)
12 months
 21.0
 10.9
 1.929* (1.668, 2.229)
24 months (n = 751)
 24.6
 11.5
 2.151* (1.701, 2.721)
Obesity (%)
  
  
  
1 month
 0·3
 0·4
 0·750 (0·261, 2·158)
2 months
 0·1
 0·3
 0·500 (0·125, 1·997)
3 months
 0·2
 0·2
 1·000 (0·250, 3·993)
4 months
 0·2
 0·2
 0·800 (0·215, 2·975)
5 months
 0·5
 0·3
 1·429 (0·545, 3·746)
6 months
 1·0
 0·6
 1·750 (0·863, 3·548)
7 months
 1·2
 0·8
 1·500 (0·829, 2·715)
8 months
 1·9
 1·0
 1·952* (1·158, 3·292)
9 months
 2·8
 1·5
 1·875* (1·226, 2·868)
10 months
 4·2
 2·0
 2·140* (1·497, 3·058)
11 months
 6·0
 2·7
 2·241* (1·654, 3·037)
12 months
 7·9
 3·5
 2·263* (1·739, 2·945)
24 months (n = 751)
 9·2
 4·4
 2·091* (1·398, 3·126)
Weight gain, 0–12 months
  
  
  
Rapid (%)
 50.0
 38.9
 1.257* (1.181, 1.337)
Extremely (%) rapid
 27.5
 20.7
 1.214* (1.124, 1.311)
BMI gain, 1–12 months
  
  
  
Rapid (%)
 55.2
 36.5
 1.470* (1.380, 1.567)
Extremely rapid (%) 32.6 19.8 1.440* (1.328, 1.561)

*significant at p < 0.05.

1Overweight, BMI > 1.34 Z-scores = 91st centile; obesity, BMI > 2.05 Z-scores = 98th centile; rapid weight or BMI gain, gain > 0.67 Z-scores = one centile band; extremely rapid weight or BMI gain, gain > 1.34 Z-scores = two centile bands.