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Ungraded Results in CAP Surveys
1. How To Evaluate Ungraded Results?(CAP Surveys)Prepared By: BILAl Al-kadriJuNE, 2010
2. Proficiency Testing: A form of External Quality Control Good Laboratory practices Develops confidence in the accuracy & reliability of your results CAP Surveys three times/year (some two/year) Evaluate each analyte and specimen for negative/positive bias, trends or shifts
3. Documentation: Always maintain documentation of CAP surveys for minimum 2 YEARS. This includes Participant Summary, investigations. Reporting forms, evaluation reports, etc…
4. Documentation: You can download Participant Summary for each surveys as necessary. www.cap.org Refer to following slides for downloading
16. Calculate the Mean of the Means:52.9+51.6+49.2+…………..+53.7+46.7+46.9 = 55.8 23 Mean -15% is: 55.8 – (55.8 x 15/100)= 47.4 Mean +15% is: 55.8 – (55.8 x 15/100)= 47.4
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18. Calculate the Mean of the Means:4797.6 + 2309.27 + 1591.01 + 2019.5+ 2028.86 5 Mean -3SD is: 2549.25 + (3x268.37) = 1744.14 Mean +3SD is: 2549.25 + (3x268.37)= 3354.35
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20. Calculate the Mean of the Means:269.605+261.488+…………..+271.382+267.904 = 296.177 23 Mean - 20% is: 296.177– (296.177 x 20/100)= 236.942 Mean + 20% is: 296.177+ (296.177 x 20/100)= 355.412
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22. Calculate the Mean of the Means:2.49+3.37+3.17+…………..+2.64+2.71+2.86= 2.77 23 Mean - 20% is: 2.77– (2.77 x 20/100)= 2.22 Mean + 20% is: 2.77+ (2.77 x 20/100)= 3.32
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24. Calculate the Mean of the Means:18.82+34.73+33.41+…………..+29.4+28.27+29.58=28.46 26 Mean -15% is: 28.46– (28.46 x 15/100)= 24.19 Mean +15% is: 28.46 – (28.46 x 15/100)= 32.73
25. Conclusion: Code 27 – Lack of participant or referee consensus; Document a self-evaluation following instructions as per the Participant Summary. Every effort should be made to find the cause(s) of an unacceptable pt result.