Please select the outcome measures that correspond to the clinical trial below.
Title: N/A
Brief Summary: Vitamin D has a range of biological effects of public health relevance. Vitamin D status is assessed on levels of its metabolite 25-hydroxyvitamin D \[25(OH)D\], where levels \< 50 nmol/L indicate insufficiency. Despite studies indicating that the vitamin D intake among Swedish children are significantly below recommendations, little is known of their vitamin D status. The investigators have recently found inadequate vitamin D status in pre-school children living in northern Sweden, especially in dark-skinned children and during the winter months despite vitamin D intakes meeting the recommendations. Overall, 25% of the light skinned and 40% of the dark skinned children had S-25(OH) D \<50 nmol/L (Öhlund I, unpublished data). The aim is to examine which amount of vitamin D is needed to maintain or increase S-25(OH)D to ≥50 nmol/L among 97.5% of the participants regardless of skin color or geographic location (northern or southern Sweden). Furthermore the investigators will examine if vitamin D status affects on health markers as bone density, blood pressure, serum lipids, fatty acids, inflammatory and immunological markers and mental wellbeing.

Children aged 5-8 years living either northern (Umeå) or southern Sweden (Malmö) will be recruited to this trial during November-December 2012. They will be randomized to a vitamin D supplement of either 10 or 25 g per day, or in Malmö also placebo to be used for three months. The randomization will be stratified according to skin color (light or dark) according to a method using visual inspection and interviews of parents/guardians. The investigators will use a 2×2×2 factorial design to investigate the effects of two different doses of vitamin D (10 µg and 25 µg) in children with dark and light skin color, living in northern (Umeå) and southern (Malmö), Sweden. In order to achieve a moderate difference between groups (effect size 0.25) 20 children per group are required (power\> 87%, alpha = 0.05). With an estimated dropout of 10%, a total of 220 children will be included.

At baseline, the participants will undergo blood sampling for S-25(OH)D and other biomarkers, blood pressure and anthropometrical measurements, including bone densitometry and body composition using air displacement pletysmography, and the parents will answer a questionnaire on behavioral and emotional problems in the participating child using the Child Behavior Checklist. These measurements will be repeated at follow-up in February-March 2013.


Options:
A: new decayed surfaces (1 year)
B: Visiting the dentist during pregnancy and up to two months postpartum for the mother and visiting the dentist before 18 months for the child. (During pregnancy and up to two months post partum (mother); up to 18 months (child))
C: Exclusive Breastfeeding Rates in Burkina Faso (at 3 months of age); Infant Morbidity, 2 Week Diarrhoea Prevalence (at 3 months of age); Exclusive Breastfeeding Rates in Uganda (at 3 months of age); Exclusive Breastfeeding Rates in South Africa (at 3 months of age)
D: Serum 25OH-vitamin D levels (90 days after start of treatment)

Answer: D