Table 4. Probability Cutpoints, Sensitivity, and Specificity for Patients in the Placebo Group.

Model	Probability of Developing Depression
	Cutpoint	Sensitivity	Specificity
QIDS-SR baseline	≥0.356	0.688	0.857
Initial treatment with radiotherapy	≥0.387	0.750	0.612
QIDS-SR plus initial treatment with radiotherapy	≥0.145	0.938	0.755

Abbreviation: QIDS-SR, Quick Inventory of Depressive Symptomatology–Self Report.