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Anxious major depressive disorder (A-MDD) is differentially diagnosed from nonanxious MDD (NA-MDD) as MDD with a cut-off score ≥7 on the HAM-D anxiety-somatization factor (ASF). We investigated whether additional HAM-D items discriminate A-MDD from NA-MDD. Moreover, we tested the validity of ASF criterion against HAM-A, gold standard of anxiety severity assessment. Methods. 164 consecutive female middle-aged inpatients, diagnosed as A-MDD (n=92) or NA-MDD (n=72) by the normative HAM-A score for moderate-to-severe anxiety (≥25), were compared regarding 17-item HAM-D scores. The validity of ASF ≥7 criterion was assessed by receiver-operating characteristics (ROC) analysis. Results. We found medium and large effect size differences between A-MDD and NA-MDD patients in only four out of the six ASF items, as well as in three further HAM-D items, namely, those of agitation, middle insomnia, and delayed insomnia. Furthermore, the ASF cut-off score ≥9 provided the optimal trade-off between sensitivity and specificity for the differential diagnosis between A-MDD and NA-MDD. Conclusion. Additional HAM-D items, beyond those of ASF, discriminate A-MDD from NA-MDD. The ASF ≥7 criterion inflates false positives. A cut-off point ≥9 provides the best trade-off between sensitivity and specificity of the ASF criterion, at least in female middle-aged inpatients.

On the Differential Diagnosis of Anxious from Nonanxious Major Depression by means of the Hamilton Scales