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Table 2 Absolute changes in BMI SDS and rates of change in BMI SDS during each period in children who were or were not overweight or obese at 8 years of age c

From: Important periods of weight development in childhood: a population-based longitudinal study

Age, years Not overweight at 8 yearsa,d Overweightdat 8 yearsd Obese at 8 yearsa Overweightdvs. not overweight Obese versus not obesee
ΔSDSb(95% CI) ΔSDS/yearb(95% CI) ΔSDSb(95% CI) ΔSDS/yearb(95% CI)
0.00–0.25 0.06 0.31 0.41 0.25 (0.16–0.34)* 0.99 (0.63–1.35) 0.31 (0.14–0.49)* 1.25 (0.55–1.95)
0.25–0.50 -0.01 0.13 0.15 0.14 (0.11–0.17)* 0.57 (0.44–0.69) 0.14 (0.08–0.21)* 0.57 (0.31–0.82)
0.50–0.75 0.05 0.15 0.18 0.11 (0.09–0.12)* 0.42 (0.35–0.50) 0.12 (0.08–0.16)* 0.47 (0.32–0.63)
0.75–1.00 -0.12 -0.10 -0.09 0.01 (0.0–0.03) 0.05 (–0.01–0.11) 0.03 (0.0–0.05) 0.10 (0.01–0.22)
1.00–1.50 -0.14 -0.09 -0.05 0.05 (0.03–0.07)* 0.10 (0.05–0.14) 0.08 (0.03–0.13)* 0.16 (0.07–0.25)
1.50–2.00 0.10 0.21 0.30 0.11 (0.08–0.14)* 0.22 (0.16–0.27) 0.18 (0.12–0.25)* 0.37 (0.24–0.50)
2.00–4.00 -0.13 0.13 0.35 0.27 (0.22–0.31)* 0.13 (0.11–0.15) 0.45 (0.36–0.55)* 0.23 (0.18–.028)
4.00–6.00 -0.04 0.27 0.38 0.30 (0.27–0.34)* 0.15 (0.14–0.17) 0.37 (0.30–0.44)* 0.18 (0.15–0.22)
6.00–8.00 0.07 0.27 0.32 0.20 (0.17–0.22)* 0.10 (0.09–0.11) 0.22 (0.18–0.27)* 0.11 (0.09–0.13)
  1. CI, confidence interval.
  2. aChange in BMI SDS (absolute change over the specified interval).
  3. bDifference between groups of the absolute change over the specified interval (ΔSDS) of the change expressed as ΔSDS/year.
  4. cBroken stick model (N = 3172).
  5. dOverweight includes obesity.
  6. eThe “not obese” group includes all other children, also those that are overweight.
  7. T-tests were used for comparing groups: *p < .001.