Table 1 | QUALID PCA..

QUALID items	Factor 1	Factor 2	Factor 3		Correlations^a
Item 6. Verbalizations suggest discomfort	*0.837*	0.124		0.124	0.550
Item 5. Appears physically uncomfortable	*0.767*	0.084		0.084	0.502
Item 4. Facial expression of discomfort	*0.763*	-0.093		0.174	0.586
Item 11. Appears calm and comfortable	*0.567*	0.124		0.297	0.619
Item 3. Cries	*0.503*	-0.225		0.183	0.316
Item 9. Enjoys touching/being touched	-0.163	*0.891*		0.302	0.375
Item 10. Enjoys interacting with others	0.027	*0.886*		-0.176	0.240
Item 1. Smiles	0.209	*0.774*		-0.187	0.308
Item 2. Appears sad	0.055	-0.187		*0.768*	0.299
Item 7. Is irritable or aggressive	0.055	-0.098		*0.683*	0.358
Item 8. Enjoys eating	-0.036	0.385		*0.672*	0.485
Cronbach’s a coefficient	0.770	0.832		0.490
Explained variance (%)	30.4	22.3	9.6

Values in bold and cursive indicate that the QUALID item is included into factor
^aCorrelation coefficient between items and total score (corrected for overlap)

Table 1: QUALID PCA results.

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