Table 5:

Association between facial expression—objective evaluation and two categories by Fisher's exact test

Category* facial expression cross-tabulation
			Facial expression			Total
			Neutral expression	Slightly negative expression (grimace)	Definitely negative expression (furrowed eyebrows, eyes closed tightly)
Categories	A	Count	14	6	0	20
		Category (%)	70.0	30.0	0.0	100.0
		Total (%)	35.0	15.0	0.0	50.0
	B	Count	0	16	4	20
		Category (%)	0.0	80.0	20.0	100.0
		Total (%)	0.0	40.0	10.0	50.0
Total		Count	14	22	4	40
		Category (%)	35.0	55.0	10.0	100.0
		Total (%)	35.0	55.0	10.0	100.0
Fisher's exact test p-value						<0.001*

*Statistically significant