Clinical decision rule for rotator cuff tear probability

Clinical decision rule for rotator cuff tear probability[html]
<strong>Summary:</strong> A decision tool to determine probability of rotator cuff tear.
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[select name="Q1" value="0 to 39=.39|40 to 59=.59|60 to 69=.69|70 and over=.7"] <-- Age
[select name="Q2" value="False=0|TRUE=1"] <-- Supraspinatus weakness
[select name="Q3" value="False=0|TRUE=1"] <-- External rotation weakness
[select name="Q4" value="False=0|TRUE=1"] <-- Impingement
Interpretation --> [calc value="score=(Q1)+(Q2)+(Q3)+(Q4);score>2.59?'98%':score>1.99?'64%':score>1.69?'76%':score>1.39?'45%':score>.99?'12%':'5%'" memo="Interpretation"] probability of rotator cuff tear.
[html]<hr>[/html][checkbox memo="display/hide references" name="footnotes" value=""][conditional field="footnotes" condition="(footnotes).is('')"][html]
reference: <a href="http://www.aafp.org/afp/2005/0415/p1587.html" target="_blank">Am Fam Physician. 2005 Apr 15;71(8):1587-1588.</a>[/html][/conditional]