TYPES OF DATA

DISCRETE DATA - Nominal Data--- Dead/Alive, Male/Female, Sick/Well, (ford,BMW,Toyota) - Ordinal Data---- has order.. Eg; (A,B,C,D,F) ,, (Bad,ok, Good)

Continuous Data - Ratio – includes a zero, weight, age, -Interval- temperature in Farenheit,

Decide Test by Data Type

Continuous Data

Nominal Ordinal

Test T-Test X2 or fishers exact if N < 5

Wilcoxan Rank sum or Mann Whitney

Cross over Paired T-Test McNemar Wilcoxan Signed Rank

>= samples Ancova X2 Bonferoni Kruskal-Wallis

TYPES OF STUDIES

Descriptive - Visual, case report, observation…

Cross Sectional “Slice of Life” limited conclusions

Cohort Start with a similar group.. Look for Outcome (prevalence)

Experimental Random Studies

Decide who gets the drug, coufounder, Restricting time frame,

Case-Control Start with outcom, good for rare events.. (Incr bias & confounder, … INCIDENCE

RELIABILITY -

RELIABILITY