Appendix table - Harvard Medical School - Health Care Policy

Appendix Table 2. Individual-level consistency of DSM-IV diagnoses of GAD based on dichotomized screening scales with gold
standard diagnoses in key validation studies a
AUC SN LR+ SP LR- (n) Sample b Clinical Outcome
I. CIDI-SC
.81 .68 11.1 .94 0.3 (206) PC SCID (First et al., 2002)
II. GAD-7 (Spitzer et al., 2006)
.85 .89 4.9 .82 0.1 (2,740) PC (Kroenke et al., 2007) SCID (First et al., 2002)
.74 .83 2.4 .65 0.3 (157) INT (Donker et al., 2011) CIDI (Robins et al., 1988)
.79 .83 3.3 .75 0.2 (343) PC (Houston et al., 2011) SCID (First et al., 2002)
III. Other
WB-DAT .78 .63 10.5 .94 0.4 (193) MHS (Farvolden et al., 2003) SCID (First et al., 2002)
SDDS-PC .83 .90 3.9 .77 0.1 (635) PC (Broadhead et al., 1995) SCID (First et al., 2002)
WSQ .78 .93 1.7 .45 0.2 (157) INT (Donker et al., 2009) CIDI (Robins et al., 1988)
a SN = Sensitivity of the screening scale; LR+ = likelihood ratio positive of the screening scale; SP = specificity of the
screening scale; LR- = likelihood ratio negative of the screening scale.
b
PC = Primary care screening sample; MHS = Mental health specialty screening sample; COM = Community survey; INT =
Internet screening sample
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