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Estimated effects (and 95% confidence intervals) of insulin use for 1–5 years on body mass index (BMI) z-score for the whole cohort (“no interaction”) and for people with high, moderate or low BMI z-score at baseline. High, moderate and low BMI z-score was defined as the 80th, 50th and 20th percentiles of the distribution of BMI z-scores at baseline. IPTW: inverse-probability-of-treatment weighting.
