Annika Janson

BMI Body Mass Index COSI Childhood Obesity Surveillance Initiative IOTF International Obesity Task PromoKids Promoting Healthy Weight in Children WHO World Health Organization This study describes the current approaches to surveillance of children's growth in the Nordic countries, where data are gathered but not consistently compiled at the national level. Finland and Denmark have well-developed systems for compiling national data and making it accessible to authorised users.

In January 2025, a new classification of obesity was published in the Lancet Diabetes & Endocrinology [1]. It was developed by The Lancet Commission on the Definition and Diagnosis of Clinical Obesity, which comprised more than 50 researchers and experts in the field. The contributors should be praised for their enormous efforts and for including people living with obesity to ensure that the new classification included perspectives from patients.

In January 2025, Laine et al. [1] published a very important editorial in a number of prestigious medical journals. It encouraged reputable journals to warn their readers and authors about the growing number of predatory entities that are misrepresenting themselves as scholarly journals. The authors, who are all editors and members of the International Committee of Medical Journal Editors, said that the organisation was constantly receiving queries about such journals.