Ketut swarjana epidemiology measurement

EPIDEMIOLOGY MEASUREMENTS

I.K. SWARJANA

2015

RASIO

•Rasio adalah nilai perbandingan antara numerator dan denominator dan tidak diperlukan adanya hubungan antara keduanya. Misalnya X berbading Y.

•Rasio merupakan nilai X dan Y yang bersifat independen dimana X bukan bagian dari Y (Merrill, 2010).

PROPORTION

•A proportion is a type of ratio in which the numerator is part of the denominator;

•Proportion may be expressed as percentages (Friis and Sellers, 2009).

Proportion: A/(A+B) x 100.

RATE

•Rate dalam epidemiologi terdiri dari disease frequency, unit size of population and time period during which an event occurs.

POINT PREVALENCE

PERIOD PREVALENCE

INCIDENCE RATE

• 3 komponen penting (Friis and Sellers, 2009):

– A numerator: the number of new cases

– A denominator: the population at risk

– Time: the period during which the cases accrue

CASE FATALITY

CRUDE DEATH RATE

Crude Birth Rate (CBR)

FERTILITY RATE

INFANT MORTALITY RATE

MATERNAL MORTALITY RATE

Cause Specific Rate

Age Specific Rate (Ri)

TERIMAKASIHemail: ktswarjana@gmail.com