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Fig. 3 | BMC Psychiatry

Fig. 3

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. 3

Total score distribution of the PHQ-9. a The total score distribution was right-skewed, and the frequency of the zero score was 31.9%. b Using the log-normal scale, the total score distribution showed a linear pattern. As indicated by the arrow, the total score distribution exhibited slightly higher frequencies compared to those predicted from the exponential pattern at the lower end of the distributions

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BMC Psychiatry

ISSN: 1471-244X

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