lecture 3 & 4

Question 1

risk vs rates?

event -> pop

Answer 1

risk: the frequency w. which an event occurs in a pop
rate = the likelihood of an undisease person, when exposed to certain factors, will get sick

Question 2

smoker vs non smoker: RR is 10. is that a good thing?

= comparison

Answer 2

NO. means that smokers are 10x likely to get sick. bcs if RR > 1, riskier

=….of health events’ risk in 2 groups differentiated by age gender exposure

Question 3

incidence vs prevalence

which one is speicif cpoint in time vs over a period of time?

Answer 3

incidenceL the proportion of undiseased group getting sick over time
=> describes how quickly the disease spreads

prevalence: …..diseased person at a point in time; includes new and current case

Question 4

who is james lind?

Answer 4

one of the first application of nutr edpi was…..his controleld trial on the effects of citrus on sailors w/ scurvy
=> ships carry citrus before researchers proved it in labs

Question 5

nutr: past vs present:

Answer 5

nutr deficiency (1 cause) vs chronic disease (many intertwined factors)

Question 6

what is hard abt studying the rel of diet to disease?

ppl eat diff things every day

Answer 6

many chemicalsp some arent id
large # of days of food intake record to achieve stat signi

Question 7

what is nutr epi?

track nutr intake & _____
take info from ____
food forti

Answer 7

status
large pop survey & tweak programs &^ services
affect dietary guidelines, substances banning law

Question 8

bias = observation is false bcs _____ by: 1 2 3

Answer 8

systemic error was itnroduced: selection cofounding measurement

Question 9

possible reaspm for skewed observation

Answer 9

chance = error arise from random variation
truth = observation is correct. should be accepted only after others have been excluded