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Table 1 Mean body mass index (BMI) for the total sample and BMI standard deviation score (SDS) status at various target ages in children with and without overweight and obesity at 8 years of age

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

Age Years, N

 

Total sample BMI (± SD)

Not overweightc,at 8 years of age Mean BMI SDS (95% CI)

Overweightc,dat 8 years of age Mean BMI SDS (95% CI)

p-valuea,b

Not obesec,eat 8 years of age Mean BMI SDS (95% CI)

Obesecat 8 years of age Mean BMI SDS (95% CI)

p-valuea,b

0.00

2920

14.20 (1.81)

-0.07 (–0.11 - –0.03)

0.08 (0.00 - 0.16)

0.001

-0.05 (–0.08 - –0.01)

0.08 (–0.08 - 0.25)

0.132

0.25

2498

16.63 (1.51)

-0.01 (–0.04 - 0.02)

0.39 (0.32 - 0.45)

0.000

0.05 (0.02 - 0.08)

0.49 (0.35 - 0.63)

0.000

0.50

2514

17.19 (1.51)

-0.02 (–0.05 - 0.01)

0.52 (0.45 - 0.59)

0.000

0.06 (0.03 - 0.09)

0.64 (0.49 - 0.79)

0.000

0.75

2855

17.30 (1.52)

0.03 (–0.01 - 0.06)

0.67 (0.59 - 0.75)

0.000

0.12 (0.09 - 0.15)

0.82 (0.66 - 0.98)

0.000

1.00

2714

17.00 (1.41)

-0.09 (–0.13 - –0.06)

0.57 (0.50 - 0.64)

0.000

0.00 (–0.03 - 0.04)

0.73 (0.58 - 0.89)

0.000

1.50

808

16.39 (1.40)

-0.23 (–0.27 - –0.20)

0.47 (0.40 - 0.55)

0.000

-0.13 (–0.16 - –0.10)

0.68 (0.52 - 0.84)

0.000

2.00

2445

16.40 (1.43)

-0.13 (–0.17 - –0.09)

0.69 (0.61 - 0.76)

0.000

-0.01 (–0.05 - 0.02)

0.98 (0.81 - 1.15)

0.000

4.00

2391

15.80 (1.33)

0.26 (–0.30 - –0.23)

0.82 (0.76 - 0.88)

0.000

-0.12 (–0.15 - –0.08)

1.33 (1.20 - 1.46)

0.000

6.00

2316

15.83 (1.59)

0.30 (–0.33 - –0.27)

1.09 (1.04 - 1.13)

0.000

-0.11 (–0.14 - –0.08)

1.71 (1.63 - 1.79)

0.000

8.00

3172

16.85 (2.40)

-0.23 (–0.26 - –0.20)

1.35 (1.32 - 1.39)

0.000

-0.01 (–0.04 - 0.02)

2.03 (1.97 - 2.09)

0.000

  1. SD, standard deviation, CI, confidence interval.
  2. aTwo-sample independent t-test.
  3. bStatistically significant (p < .001).
  4. cBroken stick model (N = 3172).
  5. dOverweight includes obesity.
  6. eThe “not obese” group includes all other children, also those that are overweight.