Fig. 1. Relationship of PHQ results to functional status (SF-20 scales). Because of missing data for some patients, the range of numbers of patients across scales was as follows: symptom-screen–negative, 409 to 422; symptom-screen–positive but no psychiatric diagnosis, 152 to 157; subthreshold psychiatric diagnosis, 197 to 208; and threshold psychiatric diagnosis, 190 to 201.

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