AimTo examine differences in health‐related quality of life between boys and girls in the first and third years of upper secondary school.DesignProspective longitudinal study.MethodsThe KIDSCREEN‐10 was used to assess health‐related quality of life. Differences in health‐related quality of life over time were estimated using a linear mixed‐effects model for correlated measurements.ResultsIn the first‐year boys (N = 168) and girls (N = 228) reported a mean health‐related quality of life score of 76.3 (SD 10.7) and 69.8 (SD 11.5), respectively. In the third year, the mean health‐related quality of life score for boys and girls was 73.5 (SD 12.4) and 65.7 (SD 13.3), respectively. Boys had a significant decrease in health‐related quality of life mean score of −2.6 and girls a significant decrease of −3.8 (p < .001) over the 3‐year period. There was no significant difference between boys’ and girls’ health‐related quality of life changes (p = .39).

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Aim:The Norwegian Action Plan for a Healthier Diet (2017Diet ( -2021 set the target that 25% of infants should be exclusively breastfed for 6 months by 2022. Our aim was to determine trends in the prevalence and duration of breastfeeding in the municipality of Bergen.Methods: Data on breastfeeding status in 2010-2018 were extracted from a standardised electronic medical record kept by public child health centres and recorded as exclusive, partial or none, at 6 weeks and 6 months of age. Results:We found that 28,503 and 26,735 infants attended the 6-week and 6month consultations, respectively. The prevalence of any breastfeeding was 92.0% at 6 weeks and 78.0% at 6 months with no trend over time between 2010 and 2018.The prevalence of exclusive breastfeeding at 6 weeks was 73.9% and stable over time, but it declined at 6 months, from 28.1% in 2010 to 11.1% in 2014 and remained stable thereafter. Conclusion:During 2010-2018, the prevalence of any and exclusive breastfeeding at 6 weeks and any breastfeeding at 6 months was stable. Exclusive breastfeeding at 6 months declined halfway through the study period, to a stable, but low, prevalence of 11.1% by 2014.