Table 1 Odds ratios for overweight per z-score increase in weight for length for each of the five sets of models. The ORs are also adjusted for gestational age and sex

(a) Conditional growth:

 Birth to 6w

1.40

1.13, 1.73

0.002

 6w to 3 m

1.35

1.00, 1.81

0.049

 3 to 6 m

2.07

1.48, 2.89

<0.001

 6 to 12 m

1.56

1.15, 2.10

0.004

 12 to 24 m

1.53^a

1.15, 2.02

0.003

(b) Being bigger:

 At birth

1.31

1.10, 1.56

0.003

 birth to 6w

1.59

1.28, 1.98

<0.001

 birth to 3 m

1.73

1.37, 2.18

<0.001

 birth to 6 m

1.95

1.53, 2.49

<0.001

 birth to 12 m

2.09

1.63, 2.69

<0.001

 birth to 24 m

2.35

1.80, 3.07

<0.001

(c) Becoming bigger and staying bigger:

 Birth to 6w

2.11

1.62, 2.75

<0.001

 6w to 3 m

1.87

1.35, 2.59

<0.001

 3 to 6 m

2.51

1.77, 3.56

<0.001

 6 to 12 m

1.86

1.35, 2.56

<0.001

 12 to 24 m

1.53^a

1.15, 2.02

0.003

(d) Growing faster v being bigger:

 Birth to 6w

0.88

0.72, 1.07

0.19

 6w to 3 m

0.78

0.58, 1.06

0.11

 3 to 6 m

1.06

0.74, 1.52

0.75

 6 to 12 m

0.74

0.53, 1.06

0.099

 12 to 24 m

0.65^b

0.47, 0.90

0.009

(e) Becoming bigger v being bigger:

 Birth to 6w

0.9

0.73, 1.10

0.30

 6w to 3 m

0.8

0.58, 1.08

0.15

 3 to 6 m

1.07

0.74, 1.53

0.72

 6 to 12 m

0.79

0.56, 1.12

0.19

 12 to 24 m

0.65^b

0.47, 0.90

0.009