Inclusion Criteria:  Children hospitalised at the Nantes University Hospital in the neonatal period With a body composition measurement performed at discharge from neonatal hospitalization as part of the EPIPOD protocol Born prematurely (under 35 weeks of amenorrhea) Included in the Lift cohort with follow-up up to 7 years Aged between 8 and 14 years at inclusion  Exclusion Criteria:  Children with an isolated metabolic disease: insulin-dependent diabetes; endocrine disease (Cushing's, hypothyroidism) Age of 15 years or more with a chromosomal anomaly with contraindicating measurement of the BOP-POD: ventilatory support, continuous parenteral feeding, elimination stoma Refusal of either parent or child