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Table 4 Inter-item tetra-choric correlation matrix of the Migraine Screen-Questionnaire (MS-Q) scores in Ethiopian university students

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

Items of the MS-QMean ± SDMSQ-1MSQ-2MSQ-3MSQ-4MSQ-5
MSQ-10.44 ± 0.50     
MSQ-20.25 ± 0.430.742    
MSQ-30.23 ± 0.420.6230.683   
MSQ-40.39 ± 0.490.6130.6310.708  
MSQ-50.51 ± 0.510.5980.5950.5710.731 
  1. SD Standard deviation