RT Journal Article SR Electronic T1 Review: screening instruments had sensitivities of 67–100% and specificities of 53–98% for detecting major depression in older primary care patients JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 124 OP 124 DO 10.1136/ebm.9.4.124 VO 9 IS 4 YR 2004 UL http://ebm.bmj.com/content/9/4/124.abstract AB