Thank you so much for this video. You help me a lot in writing my proposal. It is going to help me a lot in my project. May God bless you abundantly. Gracias
Thank you very much for this great explanation! I wondered if there is a possibility to extract the information from the plot (roc-curve) into a table. So that i can see the sens and spec for all possibile cut-offs. I coudn't find anything about this in the r package handbook. Do you have an idea, how i could transform this into a table?
Thanks for the video, nice explanation. Could you please explain why the values of J in ID's 19 and 20 are neglected? They have the highest J indices...
@@NishantSewgobind Oh that one. In ID 19, Sens = 0.0909 and Spec = 0.889, so J index is 0.0901 + 0.889 - 1 = -0.02 (not 0.798), while for ID 20, Sens = 0.0909 + Spec = 1, so J index is 0.0909 (not 0.909) . Im sorry about that but i think there was a typo error on those two in the powerpoint i used. THANKS A LOT for raising that concern. I didn't see that. Nonetheless, the Max J index is still the one at ID 12, which J index is 0.616.
Hello! This topic is quite far away from my specification so maybe I have stupid question. It’s about ECLIA test for Covid and the results are in COI, where COI1 is reactive and positive for antibodies. I just dont understand if the higher number tells me something about quantity of antibodies or no. Basically I’m just curious what that number tells. Brother was tested for Covid antibodies and his number is COI=11. Thanks for your answer.
I am not a medical laboratory scientist to answer ur question perfectly but as far as my readings are concerned (as to what i understood), yes the cutoff index (COI) indicates the amount of antibodies (specifically nucleocapsid) produced while patients have COVID-19. The nucleocapsid is at its peak on the first 12hrs of infection so maybe ur brother is at its early infection state when ELICA test was performed thats why it’s high to as much as 11. you may refer to these articles: mdpi-res.com/d_attachment/diagnostics/diagnostics-11-01808/article_deploy/diagnostics-11-01808.pdf www.rrh.org/documents/COVID-19-Ab-Fact-Sheet.pdf Thank u.
Good day. I would like to ask for your help. If I want to calculate the sensitivity and specifity for a different cut-off point, how do you run it in R using the same package? Thank you for your help in advance