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Table 2 Descriptive statistics for the K6 distributions of the four major surveys

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

Survey

N

Mean ± S.D.

Skewness

Kurtosis

Median

SPD

NHIS

24,683

2.9 Â± 4.1

2.0

4.7

1

4.0%

NSDUH

41,082

4.3 Â± 4.5

1.5

2.4

3

6.4%

BRFSS

31,502

2.8 Â± 3.8

2.2

5.8

2

3.6%

CSLC

201,116

2.8 Â± 3.6

1.7

2.8

1

3.9%

  1. N number of samples, SD standard deviation, SPD the prevalence of serious psychological distress (a score of ≧13 on K6) All descriptive statistics were based on raw data
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BMC Psychiatry

ISSN: 1471-244X

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