Relationship between screen time and nutrient intake in Japanese children and adolescents: a cross-sectional observational study.

Background: Sedentary behaviors have recently become an important public health issue. We aimed to investigate the relationship between screen time and nutrient intake in children and adolescents.

Methods: The present study was conducted in 2013.

The associations between lifestyles and mental health using the General Health Questionnaire 12-items are different dependently on age and sex: a population-based cross-sectional study in Kanazawa, Japan.

Objectives: The aim of this study was to examine potential differences of the associations between mental health and lifestyle factors across a wide range of age.

Methods: In August/September 2011, data were collected from 4693 males (age 51.6 ± 19.

Common risk factors for changes in body weight and psychological well-being in Japanese male middle-aged workers.

Objectives: Overweight and poor psychological well-being are becoming serious health issues in the Japanese workplace. Concurrence of those physical and mental conditions has been pointed out, especially in middle-aged workers. Therefore, we tried to determine common risk factors for body weight gain and the deterioration of psychological well-being in male middle-aged office workers using a five-year follow-up study.

Psychological factors including sense of coherence and some lifestyles are related to general health questionnaire-12 (GHQ-12) in elderly workers in Japan.

Objectives: The number of elderly workers has also been increasing and poor psychological well-being in elderly workers has been reported. The aim of this study is to elucidate the factors that are related to poor psychological well-being in elderly workers.

Methods: We administered General Health Questionnaire-12 (GHQ-12) as an indicator of psychological well-being to 330 male elderly workers in the age range of 50-69, and analyzed different psychological factors, namely sense of coherence (SOC), and physical and lifestyle variables such as blood pressure, serum total cholesterol, smoking frequency, alcohol intake, exercise frequency, and body mass index (BMI) that are related to GHQ-12.

[The effects of nutrition and life-style on calcaneal bone mass in high school students].

Objective: To clarify the effects of nutrient/food intake and lifestyle, especially exercise, on calcaneal bone mass in both male and female high school students.

Methods: A total of 798 healthy Japanese high school students (281 boys and 517 girls) were recruited, and their calcaneal bone was assessed by ultrasound using Lunar Achilles. The subjects were thereby divided into a lower bone mass group and a normal bone mass group according to stiffness at the cut-off level of 90 for the boys, and 77 for the girls.