Longitudinal birth cohort study found that a significant proportion of children had abnormal metabolic profiles and insulin resistance at 6 years of age

Aim Metabolic syndrome represents a cluster of risk factors for cardiovascular disease, and we investigated whether otherwise healthy 6‐year‐olds showed metabolic alterations. Methods This study followed up a representative Swedish population‐based cohort of full‐term infants recruited on the maternity ward at Hallands Hospital Halmstad, Sweden, from 2008 to 2011. They were examined at a mean of 6.6 years of age (range 6.5–6.9) using various measures for signs of metabolic syndrome. Results One key measure showed that 55 (26%) of the 212 children had one or more risk factors for metabolic syndrome requiring action. The 37 who were obese (3%) or overweight (14%) were significantly more likely to be insulin resistant than the normal weight group (28% versus 5%, p < 0.001) and have high triglycerides (8% versus 0%, p < 0.001). Children with high waist circumferences had higher systolic (p   =   0.01) and diastolic (p   =   0.02) blood pressure than those with normal waist circumferences. Waist circumference identified children at high risk of metabolic syndrome better than body mass index. Conclusion A significant percentage of 6‐year‐old children showed abnormal metabolic profiles, including insulin resistance, which increased their risk of cardiovascular disease. Waist circumference was a stronger marker for metabolic alterations than body mass index.