Medicine/Epidem med.

[Andrew Dyshuk]

Guys,
please help.
I am working of the presentation. Topic: Medicine.
I can not find a proper Russian words for some words that I have.
Here they are:
1. ratios, proportions, and rates.

Вот пример предложения:
We will talk about 3 measures to relate the number of cases to the size of the population from which they occurred: ratios, proportions, and rates.

2. Attack rate and incidence risk.
Пример:

75 people attended a church picnic, and 46 subsequently developed gastroenteritis. Calculate the attack rate for gastroenteritis.

Выражение встречается в следующем контексте:

We will talk about 3 measures to relate the number of cases to the size of the population from which they occurred: ratios, proportions, and rates.
Заранее спасибо

[costyan]

ratios - соотношения.
Proportions - пропорции (ИМХО)
Rates - Частота

[Andrew Dyshuk]

Ogromnoe spasibo!

[George1]

Proportions - могут быть доли