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Table 4 Polychoric correlations (95% CI) among the Anxiety Scale items

From: A psychometric evaluation of the interRAI Child and Youth Mental Health instruments (ChYMH) anxiety scale in children with and without developmental disabilities

  Polychoric Correlation (95% CI)
1. 2. 3. 4. 5. 6.
ChYMH Sample
 1. Anxious complaints/ concerns      
 2. Unrealistic fears .546 (.519–.575)     
 3. Obsessive thoughts .461 (.413–.478) .479 (.458–.515)    
 4. Intrusive thoughts or flashbacks .297 (.267–.340) .388 (.351–.421) .466 (.433–.501)   
 5. Episodes of panic .424 (.402–.459) .496 (.461–519) .454 (.420–.483) .459 (.428–.491)  
 6. Nightmares .293 (.269–.334) .398 (.364–.452) .284 (.237–.307) .435 (.404–.470) .345 (.308–.380)
ChYMH-DD Sample
 1. Anxious complaints/ concerns      
 2. Unrealistic fears .448 (.352–.532)     
 3. Obsessive thoughts .351 (.256–.446) .263 (.156–.363)    
 4. Intrusive thoughts or flashbacks .208 (.097–.301) .356 (.250–.459) .325 (.212–.420)   
 5. Episodes of panic .292 (.198–.384) .453 (.362–.543) .293 (.182–.381) .432 (.315–.523)  
 6. Nightmares .148 (.043–.256) .304 (.196–.399) .140 (.037–.246) .440 (.335–.552) .255 (.156–.365)