Various ways of disease classification a b c D

Various ways of disease classification

a b

c D

Spesifik neden Brucella infeksiyonu

lezyon plasentit

problem abortus

susuzluk arsenik streptokok Aujesky virus

Beyin lezyonu D Beyin

Lezyonu C Beyin

lezyonu B Beyin lezyonu A

ATAKSİ

Bilinmeyen

neden Zehirli yem Şeker küspesi

Polio ensefalomalasi

ataksi

Herpesvirus IBR/IPV

Burun akıntısı öksürük Üreme

problemi

Rhinit vaginit

1

Quality of data

2. Accuracy 3. Detail

4. Precision 5. Reliability 6. Validity

7. specificity and sensitivity (sensitivity)

2

Possible consequences of a diagnostic procedure

3

Test result Real situation

diseased Not diseased diseased A B

Not diseased C D

Sensitivite = a/(a+c)

Spesifite = d/(b+d)

Quality of data

4

8. deviations

** reasons for deviation

Misaligned deviations Personal deviations

Measurement deviations

Selective deviations

Encoding of data

5

• The underlying data or information in epidemiological studies can also be expressed in words or numbers, as well as in coding.

• Coding is the abbreviated form of words or numbers.

• Coding can be done with letters (alpha codes), numbers (numeric codes), both (alphanumeric codes) or

symbols.

CODE STRUCTURE

6

Animals can be divided into two groups.

The first one is permanent, such as species, race, date of

birth, and gender. These remain unchanged for life. The

second group includes features that remain unchanged

throughout their life.