Odds ratio and 95% confidence interval of being overweight (BMI≥25 kg/m²) as a young-adult (age 20–29 years) according to infant growth status between target ages: Rapid Weight-for-Length growth (Δ≥0.67 Z score) vs. Non-rapid Weight-for-Length growth (Δ<0.67 Z score).

-Overall N = 422, 101 overweight young adults (BMI≥25 kg/m2). -Target age represents the beginning and end point of the growth period, e.g. 0–1 is birth to1 month. -Rapid infant growth: (Δ≥0.67 Z score of WHO weight-for-length standard) ∼ change in centile on growth chart. - OR (95% CI) represents estimate for rapid growth (Δ≥0.67) between target ages compared to non-rapid growth (Δ<0.67 Z score) (OR = 1.00). - aNovwt/ Nrapid = Number who became overweight as young adults in the group who experienced rapid growth between target age points. -All models adjusted for sex, gestational age at birth, age at adulthood obesity assessment, birth year, maternal and paternal age and BMI and birth weight-for-length Z-score.