A Brief Introduction to Biostatistics
c. jardin
(C. Jardin)
#1
Summarizing categorical data
- A Proportion is a type of fraction in which the numerator is a subset of
the denominator
- proportion dead = 35/86 = 0.
- Odds are fractions where the numerator is not part of the denominator
- Odds in favor of death = 35/51 = 0.
- A Ratio is a comparison of two numbers
- ratio of dead: alive = 35: 51
- Odds ratio: commonly used in case-control study
- Odds in favor of death for females = 12/25 = 0.
- Odds in favor of death for males = 23/26 = 0.
- Odds ratio = 0.88/0.48 = 1.