Complex Obesity Models

Question 1

Two characteristics of complex obesity models =

Answer 1

System dynamic models
Agent based models

= combined of study obesity

Question 2

How does Energy intake relate to fat mass and fat-free mass?

Answer 2

Question 3

How is the rate of change of body mass measured? (formula)

Answer 3

Question 4

How is the constant c measured? (formula)

Answer 4

Question 5

10 percent energy intake = u
90 percent energy intake =

Answer 5

• used during eating + digestion
• available for BMR PAL

Question 6

Formulas for:
Change in FM
Change in FFM

Answer 6

Question 7

BMR =

Answer 7

Question 8

Complex obesity models w/ age, what do these models entail?

Answer 8

complex models = include + vary parameters
energy intake
PAL
age

Question 9

What tools are used in complex obesity models? (3)

Answer 9

Vensim sliders = allow varying parameters
Vensim look-up tables = allow = data storage
Vensim Synthesim

Question 10

basal energy expenditure for FFM =
kff depends on =

Answer 10

look up table
sex + age
ie. can be classified in tanner-stages

Question 11

Parameters:

Answer 11

Question 12

Red line =
Blue line =
Green line =

Answer 12

Fat free mass
Total mass
Fat mass

Question 13

What is the Agent-based model (ABM)?

Answer 13

describes how environ. affects weight gain in children (in this example)

Question 14

What are the 3 components of the ABM?

Answer 14

• environment (ie. recreation area/home/school/food sources)
• agents (ie. participants)
• network (ie. interaction amongst children)

Question 15

How do we Integrate the system dynamic model into the agent-based model? (3)

Answer 15

• model every participant as = body mass model
• when participant visits food source = energy intake increases
• when participant visits recreation area (play sport) = energy used up
  body mass decreases

Question 16

LRD for ABM:

Answer 16