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Table 5 Reliability test of the HIS and each dimension

From: The reliability, validity and screening effect of the happiness index scale among inpatients in a general hospital

Reliability statistic

Dimension

Number of items

McDonald's ω(n = 8405)

Guttman Split-Half (n = 8405)

Test–retest reliability (n = 87)

Depression

2

0.798

0.792

0.809

Anxiety

2

0.815

0.814

0.863

Insomnia

2

0.891

0.891

0.800

Suicide

2

0.878

0.720

0.640

Total

8

0.825

0.920

0.745

  1. One Correlation Power Analysis: A sample size of 86 achieves 90% power to detect a difference of 0.20000 between the null hypothesis correlation of 0.75000 and the alternative hypothesis correlation of 0.55000 using a two-sided hypothesis test with a significance level of 0.05000
  2. The demographic distribution of the 87 retest samples was not significantly different from the total sample. See additional file 1 for details
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BMC Psychiatry

ISSN: 1471-244X

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