• Antti Saari, Ulla Sankilampi, Marja-Leena Hannila, Vesa Kiviniemi, Kari Kesseli, and Leo Dunkel.
• Department of Pediatrics, School of Medicine, University of Eastern Finland, Kuopio, Finland.
• Ann. Med. 2011 May 1; 43 (3): 235-48.

Background And ObjectivesGrowth curves require regular updates due to secular trends in linear growth. We constructed contemporary growth curves, assessed secular trends in height, and defined body mass index (BMI) cut-off points for thinness, overweight, and obesity in Finnish children.Material And MethodsMixed cross-sectional/longitudinal data of 73,659 healthy subjects aged 0-20 years (born 1983-2008) were collected from providers in the primary health care setting. Growth references for length/height-for-age, weight-for-length/height, and BMI-for-age were fitted using generalized additive models for location, scale, and shape (GAMLSS). BMI percentile curves passing through BMIs 30, 25, 18.5, 17, and 16 kg/m(2) at the age of 18 years were calculated to define limits for obesity, overweight, and various grades of thinness.ResultsIncreased length/height-for-age was seen in virtually all age-groups when compared to previous Finnish growth data from 1959 to 1971. Adult height was increased by 1.9 cm in girls and 1.8 cm in boys. The largest increases were seen during the peripubertal years: up to 2.8 cm in girls and 5.6 cm in boys. Median weight-for-length/height had not increased.ConclusionsNew Finnish references for length/height-for-age, weight-for-length/height, and BMI-for-age were constructed and should be implemented to monitor growth of children in Finland.

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