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Fig. 1 | BMC Psychiatry

Fig. 1

From: Mathematical pattern of Kessler psychological distress distribution in the general population of the U.S. and Japan

Fig. 1

Relative frequencies of the K6 total score distributions from (a) NHIS, (b) NSDUH, (c) BRFSS, and (d) CSLC. While they were commonly right-skewed across the four surveys, the frequency of a zero score was apparently lower in the NSDUH (23.0%) than in the NHIS (40.8%), BRFSS (33.3%), and CSLC (40.2%). Red dotted lines indicate exponential regression curves. Except for at the lower end of the distributions, all exponential regression curves and the K6 distributions almost overlap. At the lower end of the distributions, the exponential regression curves deviate from the K6 distributions to some extent

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