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Table 3 Multivariate descriptive, sample size adequacy, quality and effectiveness of factor score, construct replicability and reliability measures of the Migraine Screen-Questionnaire (MS-Q) scores in Ethiopian university students

From: Migraine screen questionnaire: further psychometric evidence from categorical data methods

Measures

Values

Multivariate descriptive

 Mardia’s skewness

Χ2(df = 35) = 271.190, p = 1.00

 Mardia’s kurtosis

Χ2 = 0.513, p = 0.3038

Quality and effectiveness of factor score estimatesa

 Factor Determinacy Index (FDI)

0.953

 expected a posteriori marginal reliability

0.909

Construct replicabilitya

 H-Latent

0.909

 H-Observed

0.727

Sample size adequacy

 Bartlett’s test of Sphericity

Χ2(df = 10) = 430.3, p < 0.001

 Determinant

0.282

 KMO (95% confidence interval)

0.804 (0.770–0.845)

Internal consistency

 Greatest Lower Bound to Reliability

0.932

 McDonald’s Omega

0.903

  1. Kaiser-Meyer-Olkin Test of Sampling Adequacy (KMO)
  2. a For the 1-Factor structure of the MS-Q