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Table 3 Tetrachoric correlation coefficient (rho) matrix for the proposed night eating syndrome diagnostic criteria (N = 722)

From: Factor structure of the Night Eating Diagnostic Questionnaire (NEDQ) and an evaluation of the diagnostic criteria of the night eating syndrome

Criterion Evening Hyperphagia Nocturnal Ingestion Morning Anorexia Sleep Problems Evening Urge to Eat Eat to Sleep Lower Mood in Evening Aware
Nocturnal Ingestion .46***        
Morning Anorexia .32*** .23**       
Sleep Problems .22** .44*** .24***      
Evening Urge to Eat .46*** .44*** .16* .19**     
Must Eat to Sleep .45*** .91*** .12 .30** .51***    
Lower Mood .07 .22** .09 .16** .27*** .26**   
Aware .37*** .92*** .13 .37*** .36*** .82*** .19*  
Distress/ Impaired .46*** .62*** .26*** .21** .59*** .65*** .18* .46***
  1. Note: statistical significance for tetrachoric coefficients is based on standard error
  2. *p < .05, **p < .01, ***p < .001