lectures Flashcards
BMI (Body Mass Index)
a number calculated from a person’s weight and height. BMI provides a reliable indicator of body fatness for most people and is used to screen for weight categories that may lead to health problems. Obesity = 30 or higher in adults
Facts Quiz (4)
- more than 2/3 of US adults are obese or overweight. 2. gender gap is closing in regards to adult obesity rates. 3. obesity-related conditions include heart disease, stroke, type 2 diabetes and certain types of cancer, some of the leading causes of preventable death (not to mention orthopedic problems, mental health problems, etc) 4. adult obesity rates vary significantly for women in different racial and ethnic groups
Why care about childhood obesity? (2)
- obese children are more likely to become obese adults 2. if children are overweight, obesity in adulthood is likely to be more severe
Is childhood obesity a social justice problem?
Yes, it is unethical for public health community to not take action
Obesity Definition
the abnormal or excessive accumulation of fat in adipose tissue to the extent that health may be impaired
Childhood Obesity Definition
a serious medical condition that affects children and adolescents. It occurs when a child is well above the normal weight for his or her age and height. Childhood obesity is particularly troubling because the extra pounds often start children on the path to health problems that were once confined to adults, such as diabetes, high blood pressure, and high cholesterol. Childhood obesity can also lead to poor self-esteem and depression
Issue with measurement
Classification of obesity to a single measure is difficult
Individual-level effect on childhood obesity
Complex since children (young children) have less control over their behaviors than older children and adults, thus there are many environmental influences (caregivers and their behaviors, peers) that must be considered
When designing interventions, what is important to consider about children?
the cognitive level, as well as the ability of outside entities to influence them (marketing)
When are times of intensive growth? (4)
Also called critical periods. Development of obesity can occur during 1. gestation 2. early infancy 3. adiposity rebound (the time in early childhood when body fat begins to increase), and 4. puberty
Facts about family dinner (2)
- away-from-home dining contributes to the obesity problem, as these foods tend to be higher in fat and saturated fat and lower in fiber 2. frequency of family dinner has been associated with healthier meals
Influence of Parental Activity (5)
- interventions directed at families and or parents have a potential for benefit in children, without necessarily targeting the child 2. parents are role modeling 3. shared physical activity 4. they have the same genetic influences 5. increased access
Adiposity Rebound (3)
- child’s BMI increases during the first year of life. After that, BMI gradually decreases until it reaches its lowest point around 6years of age, then increases again 2. age of the lowest point BMI is at the start of of Adiposity Rebound 3. children who experience early age of AR are at risk of being overweight
mother’s factors (6)
- pre-pregnancy maternal weight 2. pregnancy weight gain 3. pregnancy glucose tolerance 4. toxic exposures in pregnancy 5. breastfeeding initiation, maintenance 6. feeding practices
child’s factors (4)
- birth weight 2. weight gain in the early months and years 3. duration of breastfeeding 4. night feedings
Low birth weight babies
babies that are small for gestational age (SGA) are prone to develop obesity. Led to the concept of prenatal developmental programming as key to later obesity
High birth weight babies
as birth weight rises, child and young adult BMI rises
Gestational Diabetes Mellitis (GDM)
GDM raises risk of high birth weight (LGA), and LGA babies and babies of mother with GDM are at high risk for childhood obesity
Types of toxic exposures in pregnancy (6)
- smoking 2. endocrine disrupting chemicals 3. glucocorticoids, other hormones 4.some plastics 5. some pesticides 6. low protein diet
proposed mechanisms during development (2)
- disruption of processes controlling eating, activity, metabolism, and fat formation
- during critical developmental windows - the formation of appetite and satiety centers in brain
Effects of breastfeeding (3)
- duration of breastfeeding is inversely related to pediatric overweight 2. exclusive breastfeeding has a stronger protective effect that breastfeeding combined with formula feeding 3. protective effects may extend into adulthood
Why is breastfeeding so influential? Possible explanations (3)
- child can decide when finished feeding 2. insulin response greater with formula-fed infants (higher insulin levels = more fat tissue and weight gain) 3. leptin (hormone that inhibits appetite and controls fat) may be influenced by breastfeeding
mental health effects of childhood obesity (6)
- obese children were rated more negatively, across racial groups 2. obese adolescents report more victimization than do overweight adolescents 3. more likely to report suicidal ideation than those who were not teased 4. may impact interpersonal relations (friendships, dating) 5. can result in unhealthy eating behaviors 6. greater levels of general stress
How does the Degree of teasing relate to mental health?
Positively related to weight concerns, loneliness, lower confidence in physical appearance, and higher preference for isolative activities
Attitudes toward overweight
Female adolescents viewed an overweight peer more positively when her obesity could be attributed to a medical reason (thyroid condition), otherwise individual was seen as self-indulgent, lacking self-discipline and less popular
Parental Bias
parents themselves may also be the ones to stigmatize their children. This perceived parental responsibility combined with obstacles encountered in helping their child achieve successful weight loss may create an atmosphere of frustration and anger in the household–Stop blaming the parents!
Epigenetics Definition
the development and maintenance of an organism is orchestrated by a set of chemical reactions that switch parts of the genome off and on at strategic times and locations. Epigenetics is the study of these reactions and the factors that influence them