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RegisterR2-adj, cut-off [PK / PD]
posted by Helmut 
– Vienna, Austria, 2009-04-23 16:39 (5917 d 22:24 ago) – Posting: # 3593
Views: 10,423
Dear Raveendra!
Neither nor, because R² depends on the number of data points used in the estimation. In linear regression R² 0.9756 (n=3) ‘explains’ the same amount of information as R² 0.5314 (n=6)!
For a rather lengthy discussion see this thread.
If you truly want to set a cut-off, then R²adj should be used. BTW a cut-off common to all studies is not justified. For drug A a R²adj of 0.95 may be easy to get, whilst for drug B a R²adj of even 0.75 very difficult.
❝ […] what is the minimum R2 value […]. some are using 0.8 and some are using 0.75. which one correct?
Neither nor, because R² depends on the number of data points used in the estimation. In linear regression R² 0.9756 (n=3) ‘explains’ the same amount of information as R² 0.5314 (n=6)!
For a rather lengthy discussion see this thread.
If you truly want to set a cut-off, then R²adj should be used. BTW a cut-off common to all studies is not justified. For drug A a R²adj of 0.95 may be easy to get, whilst for drug B a R²adj of even 0.75 very difficult.
—
Dif-tor heh smusma 🖖🏼 Довге життя Україна!![[image]](https://static.bebac.at/pics/Blue_and_yellow_ribbon_UA.png)
Helmut Schütz
![[image]](https://static.bebac.at/img/CC by.png)
The quality of responses received is directly proportional to the quality of the question asked. 🚮
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Dif-tor heh smusma 🖖🏼 Довге життя Україна!
Helmut Schütz
The quality of responses received is directly proportional to the quality of the question asked. 🚮
Science Quotes
Complete thread:
- R square value graveendranath 2009-04-23 06:04 [PK / PD]
![[Mix]](https://static.bebac.at/img/mix.png "open in Mix view")
- R square value SDavis 2009-04-23 10:25
- R square value atish_azad 2009-04-23 13:05
- R2-adj, cut-offHelmut 2009-04-23 14:39
Ing. Helmut Schütz