Logistic regression - how is percent concordant calculated?

[adrfinance]

The output of a logistic regression gives me the following information:

Association of Predicted Probabilities and Observed Responses
Percent Concordant	71,3	Somers' D	0,457
Percent Discordant	25,6	Gamma	0,471
Percent Tied	3,1	Tau-a	0,164
Pairs	56483682	c	0,728

and 

Response Profile
OrderedValue	deterioration	TotalFrequency	TotalWeight
1	0	13542	19214,7
2	1	4171	7150,3

What is the formula to calculate the percent concordant from the above?

[PaigeMiller]

Many many articles on the internet explaining percent concordance.

[adrfinance]

So is there a way to calculate it using the information above?

[ballardw]

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@adrfinance wrote:

So is there a way to calculate it using the information above?

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It looks like the percent concordant was already calculated as posted in the first post.

So I think you may be missing a detail or two at this question.

[adrfinance]

Sorry, I don't understand what you are saying. How is it calculated?

[Reeza]

Here is some annotated output from PROC LOGISTIC that will help you interpret the table. You may need the output predicted and actual values table to recreate the calculations. 

https://stats.idre.ucla.edu/sas/output/proc-logistic/

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@adrfinance wrote:

The output of a logistic regression gives me the following information:

Association of Predicted Probabilities and Observed Responses
Percent Concordant	71,3	Somers' D	0,457
Percent Discordant	25,6	Gamma	0,471
Percent Tied	3,1	Tau-a	0,164
Pairs	56483682	c	0,728

and 

Response Profile
OrderedValue	deterioration	TotalFrequency	TotalWeight
1	0	13542	19214,7
2	1	4171	7150,3

What is the formula to calculate the percent concordant from the above?

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