I would like to pass a table to either a UDF or stored procedure and then have it process the data and return the sensitivity, specificity and 95% Upper/Lower Confidence Intervals (for each) from the table I pass to it.
Basically, from a table I need to calculate and return six values.
I have to do this a bunch of times so automation would be awesome but I have not created a UDF or SP. I have read up on them (stackoverflow and elsewhere but am stuck on how to proceed.
I created the SQL part to calculate the parameters of interest but I am really befuddled on how to pass a table to it and get a table back out.
DECLARE @R_MODS TABLE(
SUBJECTID varchar(max),
ResultCall varchar(max)
)
INSERT INTO @R_MODS VALUES ('11-0001','TP');
INSERT INTO @R_MODS VALUES ('11-0002','TP');
INSERT INTO @R_MODS VALUES ('11-0003','TP');
INSERT INTO @R_MODS VALUES ('11-0004','TP');
INSERT INTO @R_MODS VALUES ('11-0005','TP');
INSERT INTO @R_MODS VALUES ('11-0006','I');
INSERT INTO @R_MODS VALUES ('11-0007','TP');
INSERT INTO @R_MODS VALUES ('11-0008','TP');
INSERT INTO @R_MODS VALUES ('11-0009','I');
INSERT INTO @R_MODS VALUES ('11-0010','TP');
INSERT INTO @R_MODS VALUES ('11-0011','TP');
INSERT INTO @R_MODS VALUES ('11-0012','TN');
INSERT INTO @R_MODS VALUES ('11-0013','TP');
INSERT INTO @R_MODS VALUES ('11-0014','I');
INSERT INTO @R_MODS VALUES ('11-0015','TP');
INSERT INTO @R_MODS VALUES ('11-0016','TP');
INSERT INTO @R_MODS VALUES ('11-0017','TN');
INSERT INTO @R_MODS VALUES ('11-0018','TP');
INSERT INTO @R_MODS VALUES ('11-0019','FP');
INSERT INTO @R_MODS VALUES ('11-0020','FP');
DECLARE @TP float, @TN float, @FP float, @FN float, @SEN float, @SPE float, @M1 float,
@M2 float, @Sen95 float, @SpeL float , @SpeU float, @SenU float, @SenL float
SET @TP = (SELECT COUNT(SUBJECTID) FROM @R_MODS WHERE ResultCall='TP')
SET @TN = (SELECT COUNT(SUBJECTID) FROM @R_MODS WHERE ResultCall='TN')
SET @FP = (SELECT COUNT(SUBJECTID) FROM @R_MODS WHERE ResultCall='FP')
SET @FN = (SELECT COUNT(SUBJECTID) FROM @R_MODS WHERE ResultCall='FN')
SET @SEN = @TP/(@TP + @FN)
SET @M1 = @TP + @FN
SET @SPE = @TN/(@TN + @FP)
SET @M2 = @FP + @TN
SET @SenL = ( 2*@M1*@SEN + POWER(1.96,2) - 1 - 1.96 * SQRT(POWER(1.96,2)
- 2 -(1/@M1)+ 4*@SEN *(@M1*(1-@SEN) + 1)))/(2*(@M1+POWER(1.96,2)))
SET @SenU = ( 2*@M1*@SEN + POWER(1.96,2) + 1 + 1.96 * SQRT(POWER(1.96,2)
+ 2 -(1/@M1)+ 4*@SEN *(@M1*(1-@SEN) - 1)))/(2*(@M1+POWER(1.96,2)))
SET @SpeL = ( 2*@M2*@SPE + POWER(1.96,2) - 1 - 1.96 * SQRT(POWER(1.96,2)
- 2 -(1/@M2)+ 4*@SPE *(@M2*(1-@SPE) + 1)))/(2*(@M2+POWER(1.96,2)))
SET @SpeU = ( 2*@M2*@SPE + POWER(1.96,2) + 1 + 1.96 * SQRT(POWER(1.96,2)
+ 2 -(1/@M2)+ 4*@SPE *(@M2*(1-@SPE) - 1)))/(2*(@M2+POWER(1.96,2)))
SELECT @SEN, @SenL, @SenU, 1-@SPE, 1-@SPEL, 1-@SpeU
Since your code just does calculations on data (ie no side-effects or updates of tables) and isn't coupled to tables, what you can do is to can create a table valued function to do these calculations - the function can take in the table of inputs ( R_MODS
)as a table type and also return a table of outputs ( Sen
etc).
Here's a SqlFiddle example .
In detail:
You'll need to create a table type for the inputs, eg
CREATE TYPE R_MODS_TYPE AS TABLE(
SUBJECTID varchar(max),
ResultCall varchar(max)
);
And define the function as such:
CREATE FUNCTION dbo.DoCalcs(@TheRMods R_MODS_TYPE READONLY)
RETURNS @Result TABLE
(
[SEN] DECIMAL(10,4),
[SenL] DECIMAL(10,4),
[SenU] DECIMAL(10,4),
[1-SPE] DECIMAL(10,4),
[1-SPEL] DECIMAL(10,4),
[1-SpeU] DECIMAL(10,4)
)
AS
BEGIN
DECLARE @TP float, @TN float, @FP float, @FN float, @SEN float, @SPE float,
@M1 float, @M2 float, @Sen95 float, @SpeL float , @SpeU float,
@SenU float, @SenL float;
SET @TP = (SELECT COUNT(SUBJECTID) FROM @TheRMods WHERE ResultCall='TP')
SET @TN = (SELECT COUNT(SUBJECTID) FROM @TheRMods WHERE ResultCall='TN')
SET @FP = (SELECT COUNT(SUBJECTID) FROM @TheRMods WHERE ResultCall='FP')
SET @FN = (SELECT COUNT(SUBJECTID) FROM @TheRMods WHERE ResultCall='FN')
SET @SEN = @TP/(@TP + @FN)
SET @M1 = @TP + @FN
SET @SPE = @TN/(@TN + @FP)
SET @M2 = @FP + @TN
SET @SenL = ( 2*@M1*@SEN + POWER(1.96,2) - 1 - 1.96 * SQRT(POWER(1.96,2)
- 2 -(1/@M1)+ 4*@SEN *(@M1*(1-@SEN) + 1)))/(2*(@M1+POWER(1.96,2)))
SET @SenU = ( 2*@M1*@SEN + POWER(1.96,2) + 1 + 1.96 * SQRT(POWER(1.96,2)
+ 2 -(1/@M1)+ 4*@SEN *(@M1*(1-@SEN) - 1)))/(2*(@M1+POWER(1.96,2)))
SET @SpeL = ( 2*@M2*@SPE + POWER(1.96,2) - 1 - 1.96 * SQRT(POWER(1.96,2)
- 2 -(1/@M2)+ 4*@SPE *(@M2*(1-@SPE) + 1)))/(2*(@M2+POWER(1.96,2)))
SET @SpeU = ( 2*@M2*@SPE + POWER(1.96,2) + 1 + 1.96 * SQRT(POWER(1.96,2)
+ 2 -(1/@M2)+ 4*@SPE *(@M2*(1-@SPE) - 1)))/(2*(@M2+POWER(1.96,2)))
INSERT INTO @Result ([SEN], [SenL], [SenU], [1-SPE], [1-SPEL], [1-SpeU])
SELECT @SEN, @SenL, @SenU, 1-@SPE, 1-@SPEL, 1-@SpeU;
RETURN;
END
You then invoke the table function by declaring an instance of the table type, populating it, and passing it to your function:
DECLARE @TestData R_MODS_TYPE;
INSERT INTO @TestData VALUES ('11-0001','TP'),
('11-0002','TP'),
('11-0003','TP'),
('11-0004','TP'),
... etc.
SELECT * FROM dbo.DoCalcs(@TestData);
Result:
SEN SenL SenU 1-SPE 1-SPEL 1-SpeU
--------- -------- ------- ------- ------- -------
1.0000 0.7166 0.9929 0.5000 0.9081 0.0919
Here is another approach using a Stored Procedure
You need a user-defined table data type for your input parameter.
CREATE TYPE R_MODS_TBL AS TABLE(
SUBJECTID VARCHAR(MAX),
ResultCall VARCHAR(MAX)
)
And the stored procedure:
Notice the change on the assignment of variables @TP
, @TN
, @FP
, and @FN
to use a single SELECT
statement instead of four separate ones.
CREATE PROCEDURE dbo.YourStoredProcedure(
@R_MODS R_MODS_TBL READONLY
)
AS
DECLARE
@TP FLOAT, @TN FLOAT, @FP FLOAT, @FN FLOAT,
@SEN FLOAT, @SPE FLOAT, @M1 FLOAT, @M2 FLOAT, @Sen95 FLOAT,
@SpeL FLOAT, @SpeU FLOAT, @SenU FLOAT, @SenL FLOAT
SELECT
@TP = COUNT(CASE WHEN ResultCall='TP' THEN SUBJECTID END),
@TN = COUNT(CASE WHEN ResultCall='TN' THEN SUBJECTID END),
@FP = COUNT(CASE WHEN ResultCall='FP' THEN SUBJECTID END),
@FN = COUNT(CASE WHEN ResultCall='FN' THEN SUBJECTID END)
FROM @R_MODS
SET @SEN = @TP/(@TP + @FN)
SET @M1 = @TP + @FN
SET @SPE = @TN/(@TN + @FP)
SET @M2 = @FP + @TN
SET @SenL = (2*@M1*@SEN + POWER(1.96,2) - 1 - 1.96 * SQRT(POWER(1.96,2) - 2 -(1/@M1)+ 4*@SEN *(@M1*(1-@SEN) + 1)))/(2*(@M1+POWER(1.96,2)))
SET @SenU = (2*@M1*@SEN + POWER(1.96,2) + 1 + 1.96 * SQRT(POWER(1.96,2) + 2 -(1/@M1)+ 4*@SEN *(@M1*(1-@SEN) - 1)))/(2*(@M1+POWER(1.96,2)))
SET @SpeL = (2*@M2*@SPE + POWER(1.96,2) - 1 - 1.96 * SQRT(POWER(1.96,2) - 2 -(1/@M2)+ 4*@SPE *(@M2*(1-@SPE) + 1)))/(2*(@M2+POWER(1.96,2)))
SET @SpeU = (2*@M2*@SPE + POWER(1.96,2) + 1 + 1.96 * SQRT(POWER(1.96,2) + 2 -(1/@M2)+ 4*@SPE *(@M2*(1-@SPE) - 1)))/(2*(@M2+POWER(1.96,2)))
SELECT @SEN, @SenL, @SenU, 1-@SPE, 1-@SPEL, 1-@SpeU
To execute the stored procedure, you want to populate an instance of the generated user-defined table data type:
DECLARE @R_MODS R_MODS_TBL
INSERT INTO @R_MODS VALUES ('11-0001','TP');
INSERT INTO @R_MODS VALUES ('11-0002','TP');
INSERT INTO @R_MODS VALUES ('11-0003','TP');
INSERT INTO @R_MODS VALUES ('11-0004','TP');
INSERT INTO @R_MODS VALUES ('11-0005','TP');
INSERT INTO @R_MODS VALUES ('11-0006','I');
INSERT INTO @R_MODS VALUES ('11-0007','TP');
INSERT INTO @R_MODS VALUES ('11-0008','TP');
INSERT INTO @R_MODS VALUES ('11-0009','I');
INSERT INTO @R_MODS VALUES ('11-0010','TP');
INSERT INTO @R_MODS VALUES ('11-0011','TP');
INSERT INTO @R_MODS VALUES ('11-0012','TN');
INSERT INTO @R_MODS VALUES ('11-0013','TP');
INSERT INTO @R_MODS VALUES ('11-0014','I');
INSERT INTO @R_MODS VALUES ('11-0015','TP');
INSERT INTO @R_MODS VALUES ('11-0016','TP');
INSERT INTO @R_MODS VALUES ('11-0017','TN');
INSERT INTO @R_MODS VALUES ('11-0018','TP');
INSERT INTO @R_MODS VALUES ('11-0019','FP');
INSERT INTO @R_MODS VALUES ('11-0020','FP');
EXEC dbo.YourStoredProcedure @R_MODS
Note:
When using table valued as an input parameter in a stored procedure, it is required to declare the parameter as READONLY
. Read this answer by Mikael Eriksson for more information.
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