Table 4.

Compare mean KROHL scores in the patient sample and a sample of dental students.

Measure	Dental student?	N	Mean	Std. Deviation	p-value
Caries scale	No	144	4.0	1.47
	Yes	45	5.8	1.42	<0.001
Periodontal disease scale	No	144	3.1	1.76
	Yes	45	5.6	1.38	<0.001
Oral cancer scale	No	144	2.6	1.90
	Yes	45	5.6	1.42	<0.001
Tooth loss scale	No	144	2.5	1.32
	Yes	45	4.5	1.18	<0.001
Malocclusion scale	No	144	1.2	2.15
	Yes	45	4.6	1.30	<0.001
KROHL total	No	144	13.3	5.88
	Yes	45	26.1	4.66	<0.001