The influence of immigrant background and parental education on overweight and obesity in 8-year-old children in Norway.

BACKGROUND: Little is known about the prevalence of overweight/obesity and socio-economic position (SEP) in children with immigrant background in Scandinavia. The purpose of this study is to examine the prevalence of overweight/obesity by immigrant background among children in Norway and to explore the role of SEP in explaining differences in weight status. METHODS: Anthropometric data from 8,858 children (age 8.3 years) from the population-based Norwegian Childhood Growth Study were used. Information about immigrant background, country of origin, and parental education (used as an indicator of SEP) were provided by Statistics Norway. For children with immigrant background, regional background was determined based on country of origin. Prevalence ratios (PR) were estimated for overweight/obesity and weight-to-height-ratio (WHtR) ≥ 0.5 by immigration and regional background, using generalized estimating equation log-binominal models adjusting for sex, age, survey year (model 1), residential area, population density (model 2) and parental education (model 3). RESULTS: Children with immigrant background had a higher prevalence of overweight/obesity and WHtR ≥ 0.5 than non-immigrant background children. Adjusted for parental education, children with an immigrant background from Southern and Eastern Europe, Asia except South-Asia, and Africa had a higher prevalence of overweight/obesity [PR: 1.37 (95% confidence interval (CI): 1.10-1.72), 1.28 (1.05-1.57), 1.47 (1.13-1.91), respectively] than children with a non-immigrant background. Children originating from Asia except South-Asia had a higher prevalence of WHtR ≥ 0.5 (PR: 1.64, CI: 1.25-2.15) compared to non-immigrant background children. The adjustment for parental education did not substantially change the results. CONCLUSION: Children with immigrant background had higher prevalence of overweight/obesity than non-immigrant background children. The difference varied according to region of origin but not substantially according to parental education. There is a need for culturally acceptable preventative measures targeting the parents of immigrant background children.

Associations between exposure to sexual abuse, substance use, adverse health outcomes, and use of youth health services among Norwegian adolescents.

BACKGROUND: A strong association between sexual abuse and adverse health outcomes has been reported among adolescents. The present study aimed to provide more information about adverse health outcomes associated with sexual abuse and substance use, and to examine the use of youth health services among Norwegian adolescents. METHODS: National representative cross-sectional study among 16-19-year-old Norwegian adolescents (n = 9784). Multivariable regression analyses, adjusted for socioeconomic status and age, were used to examine the association between exposure to sexual abuse, substance use and health risk factors, and the use of youth health services. RESULTS: Adolescents exposed to sexual abuse had higher odds of depressive symptoms (males: OR:3.8; 95% CI:2.5-5.8, females: 2.9;2.4-3.5), daily headache (males: 5.3;2.8-10.1, females:1.9; 1.5-2.4), high medication use (males: 3.2;1.7-6.0, females: 2.0;1.6-2.6), self-harm (males: 3.8;2.4-6.0, females:3.2; 2.6-3.9), suicidal thoughts (males: 3.3; 2.2-5.0, females:3.0; 2.5-3.6) and suicide attempts (males: 9.5;5.6-16.0, females:3.6;2.7-4.9). Furthermore, exposure to sexual abuse was associated with higher odds of using school health services (males: 3.9;2.6-5.9, females: 1.6;1.3-1.9) and health services for youth (males: 4.8;3.1-7.6, females: 2.1;1.7-2.5). In general, substance use was associated with increased odds of adverse health related outcomes and use of youth health services, but the strength of the relationships varied according to sex. Finally, results indicated a significant interaction between sexual abuse and smoking that was associated with increased odds of having suicidal thoughts for males (2.6;1.1-6.5) but a decreased odds of having suicidal thoughts and have conducted suicide attempts once or more for females (0.6;0.4-1.0 and 0.5;0.3-0.9, respectively). CONCLUSIONS: The present study confirmed a strong relationship between exposure to sexual abuse and health risks, especially among males. Moreover, males exposed to sexual abuse were much more likely to use youth health services compared to sexually abused females. Substance use was also associated with adverse health outcomes and use of youth health services, and interactions between sexual abuse and smoking seemed to influence risk of suicidal thoughts and attempts differently according to sex. Results from this study increase knowledge about possible health related effects of sexual abuse which should be used to identify victims and provide targeted treatment by youth health services.

Is there such a thing as sustainable physical activity?

There is a global need to diminish climate gas emissions, and a simultaneous call for enhanced levels of physical activity. Increased physical activity entails reduced risk for overweight and chronic diseases, as well as a potential to reduce transport's major contribution to global CO2 emissions. However, increased physical activity level also implies increased energy expenditure. Therefore, we aim to introduce the concept of sustainable physical activity, and to suggest certain physical activity habits due to their potentially sustainable properties. Worldwide, a third of adults and four fifths of adolescents ought to be more physically active in order to comply with current physical activity recommendations. Yet, considering upcoming resource challenges, types of physical activity should be taken into account. Active transportation represents carbon-friendly means of transportation as well as an opportunity for enhanced physical activity. Physical activity conducted in the local community is likely to favor sustainability through less use of fossil fuel, as it makes transportation redundant. Moreover, going "back to basic", using less equipment and appliances for everyday tasks could contribute toward energy balance through increased physical activity, and could decrease resource use. Finally, balancing food intake and energy expenditure would require less food production with accompanying energy savings.

Vitamin C and E supplementation blunts increases in total lean body mass in elderly men after strength training.

The aim of this study was to investigate the effects of vitamin C and E supplementation on changes in muscle mass (lean mass and muscle thickness) and strength during 12 weeks of strength training in elderly men. Thirty-four elderly males (60-81 years) were randomized to either an antioxidant group (500 mg of vitamin C and 117.5 mg vitamin E before and after training) or a placebo group following the same strength training program (three sessions per week). Body composition was assessed with dual-energy X-ray absorptiometry and muscle thickness by ultrasound imaging. Muscle strength was measured as one-repetition maximum (1RM). Total lean mass increased by 3.9% (95% confidence intervals: 3.0, 5.2) and 1.4% (0, 5.4) in the placebo and antioxidant groups, respectively, revealing larger gains in the placebo group (P = 0.04). Similarly, the thickness of m. rectus femoris increased more in the placebo group [16.2% (12.8, 24.1)] than in the antioxidant group [10.9% (9.8, 13.5); P = 0.01]. Increases of lean mass in trunk and arms, and muscle thickness of elbow flexors, did not differ significantly between groups. With no group differences, 1RM improved in the range of 15-21% (P < 0.001). In conclusion, high-dosage vitamin C and E supplementation blunted certain muscular adaptations to strength training in elderly men.

Association between short time in bed, health-risk behaviors and poor academic achievement among Norwegian adolescents.

OBJECTIVE: To investigate the prevalence of short time in bed (<8h/day) and to examine the association between time in bed, overweight/obesity, health-risk behaviors and academic achievement in adolescents. METHODS: This study included a sample of adolescents (n=2432) aged 15-17 years in the southern part of Norway (participation rate, 98.7%). A self-report questionnaire was used to assess time in bed, body mass index, dietary habits, physical activity habits, sedentary behavior, smoking and snuffing habits, and academic achievement. RESULTS: A total of 32.3% of the students reported short time in bed (<8h/day) on an average school night. Several health-risk behaviors were associated with short sleep duration, including not being physically active for > or =60 min for > or =5 days/week (adjusted odds ratio, 1.33; 95% confidence interval, 1.05-1.68); using television/computer >2 h/day (1.63; 1.23-2.17); being a current smoker (2.46; 1.80-3.35) or snuffer (2.11; 1.57-2.85); having an irregular meal pattern (1.33; 1.05-1.68); intake of sweets/candy > or =4 times/week (0.51; 0.32-0.83); and poor academic achievement (1.62; 1.26-2.09). All odds ratios were adjusted for sex, age and parental education. CONCLUSIONS: In Norwegian adolescents, short time in bed is associated with several health-risk behaviors and poor academic achievement.