Always stay cheerful - health information in the 1920s.

Background: The interwar period was a time of comprehensive preventive health programmes in Norway. Physical exercise, nutritious diets, strict sleep regimens and better hygiene were at the centre of these efforts. A massive mobilisation of volunteers and professionals took place.

Re-examining the link between prenatal maternal anxiety and child emotional difficulties, using a sibling design.

Background: Prenatal exposure to maternal anxiety has been associated with child emotional difficulties in a number of epidemiological studies. One key concern, however, is that this link is vulnerable to confounding by pleiotropic genes or environmental family factors.

Methods: Data on 82 383 mothers and children from the population-based Mother and Child Cohort Study and data on 21 980 siblings were used in this study.

[Overweight children--how important is the urban/rural factor?].

Background: Targeted measures to prevent overweight children are dependent on a knowledge of which environmental factors play a part. We wanted to investigate whether overweight in Norwegian eight-year-olds is related to whether they live in urban or rural areas.

Material And Method: In the cross-sectional study "Children's growth in Norway 2008", the weight, height and waist of 3473 eight-year-olds were measured.

Childhood abuse and later worries about the baby's health in pregnancy.

Objective: to explore the associations between sexual and/or physical abuse in childhood and worries about the baby's health in pregnancy.

Design: cross-sectional questionnaire study. Setting.