Problems of Borderline
-
Upload
abraham-mallela -
Category
Health & Medicine
-
view
68 -
download
1
Transcript of Problems of Borderline
![Page 1: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/1.jpg)
PROBLEMS PROBLEMS OF OF
BORDERLINEBORDERLINE
By Sneha Raj . PRoll No 94Guided By:
Sipra Madam
![Page 2: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/2.jpg)
Which of the following is more important in screening..??
Sensitivity or specificity No categorical answer can
be given
![Page 3: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/3.jpg)
![Page 4: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/4.jpg)
Shaded area → persons with disease + Persons without disease
![Page 5: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/5.jpg)
• E is frequently used as cutoff point
• E minimizes false positives and false negatives
![Page 6: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/6.jpg)
![Page 7: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/7.jpg)
Many physiological variables show this type of distribution
No sharp dividing line Borderline group contains
homogenous sample of persons
![Page 8: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/8.jpg)
Blood Pressure & Blood Sugar
![Page 9: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/9.jpg)
• Cutoff point increases - sensitivity decreases • Cutoff point decreases - sensitivity increases• In screening for disease a prior decision is made about the cutoff point
![Page 10: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/10.jpg)
Factors Considered In Fixing A Cutoff Point• Disease prevalence • Disease
![Page 11: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/11.jpg)
Disease prevalence: If disease prevalence is increased- screening is set at low level- sensitivity is increasedDisease: Lethal disease Prevalent diseases
![Page 12: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/12.jpg)
OTHER PROBLEMS:1.People who participate in screening program may not be those who have most to gain from it2.More expensive & time consuming test..
![Page 13: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/13.jpg)
3.Screening should not be done in isolation.It should be integrated into existing health services.
4. Risks as well as expected benefits must be explained to people to be screened.
![Page 14: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/14.jpg)
14
Screenes
Well
Asymptomatic Sick
Sick
![Page 15: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/15.jpg)
15
![Page 16: Problems of Borderline](https://reader036.fdocuments.in/reader036/viewer/2022062522/587d10171a28abae148b58e3/html5/thumbnails/16.jpg)