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Fig. 1 | BMC Psychiatry

Fig. 1

From: Distributional patterns of item responses and total scores on the PHQ-9 in the general population: data from the National Health and Nutrition Examination Survey

Fig. 1

Item responses on the CES-D. Item responses to the 16 depressive symptom items are presented using a normal scale (a) and a log-normal scale (b). a The lines for the 16 items crossed between “rarely” and “a little of the time.” Between “a little of the time” and “all of the time,” the same lines decreased regularly. b The lines for the 16 items showed a parallel pattern between “a little of the time” and “all of the time” on a log-normal scale. Image credit: PLoS ONE at https://0-doi-org.brum.beds.ac.uk/10.1371/journal.pone.0165928.g001

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