Lecture 17

Question 1

What is the definition of obesity?

Answer 1

• excessive body fat
• BMI of 30+

Question 2

What makes obese individuals different?

Answer 2

• distribution of excess fat
• amount of excess fat stored
• associated health consequences

Question 3

How does obesity change the distribution of excess fat?

Answer 3

• abdominal fat
• waist circumference

Question 4

How does obesity change the amount of excess fat stored?

Answer 4

• measured with BMI
• BMI correlated with body fat
• higher BMI = adverse health consequences

Question 5

What is the equation for BMI?

Answer 5

weight/height^2

Question 6

What is the r value for BMI body fat correlation?

Answer 6

0.8

Question 7

What is an underweight BMI?

Answer 7

<18.5

Question 8

What is the normal range for BMI?

Answer 8

18.5-25

Question 9

What is the overweight BMI?

Answer 9

25-35

Question 10

Why use BMI?

Answer 10

• meaningful comparisons within and between populations
• possible to identify individuals and groups at risk of morbidity and mortality
• enables priorities to be identified for interventions
• provides firm basis for evaluation of interventions

Question 11

How many children in NZ are obese?

Answer 11

3 in 10

Question 12

Mean BMI in NZ?

Answer 12

27.6

Question 13

How many adults are obese in NZ?

Answer 13

6/7 in 10

Question 14

What are the consequences of obesity?

Answer 14

• increased risk CVD
• increased risk diabetes
• increased risk of musculoskeletal disorders
• increased risk of some cancers

Question 15

Causes of obesity?

Answer 15

• energy imbalance
• multifactorial
• genetic
• environmental