Title: _________________________

Journal. Year;Volume:Page __________. _____ ; _____ : _____

Name: ______________

Date: __ __ / __ __ / 2 0 0 3
  Outcome or gold standard:
__________		  
Present absent

Treatment or diagnostic test:

__________

 Present

Cell A:

______

Cell B:

______

 Row 1 total=______
Absent

Cell C:

______

Cell D:

______

 Row 2 total=______
  Col 1 total=______ Col 1 total=______ Study size total=______


For RCTs:

Experimental event rate (EER) = Cell A / Row 1 total

    ______ / ______ = ______

Control event rate (CER) = Cell C / Row 2 total

    ______ / ______ = ______

Relative risk reduction (RRR) = (EER-CER)/CER

    ( ______ - ______ )/ ______ = ______

Absolute risk reduction (ARR) = EER-CER

    ______ - ______ = ______

NNT=1/ARR

    1 / ______ = ______
    Over what time period: _________
Would you take this intervention for yourself, does seeing the numbers help?
    Yes     No

For diagnostic studies:

Sensitivity = Cell A / Col 1 total

    ______ / ______ = ______

Specificity = Cell D / Col 2 total

    ______ / ______ = ______

Positive likelihood ratio (+LR) = sensitivity / (1 - specificity)

    ______ / ( 1 -______) = ______

Negative likelihood ratio (-LR) = (1 - sensitivity) / specificity

    (1 - ______ ) / ______ = ______
To be 95% sure the patient HAS disease, what pretest probability is necessary?
    > ______ %
To be 95% sure the patient DOES NOT HAVE disease, what pretest probability is necessary?
    < ______ %
Is this test a (circle one): SPPIN or SNNOUT