. 2020 Jan 22;10(2):61. doi: 10.3390/diagnostics10020061

Table 1.

Patient characteristics (N = 150 Greek adults).

	Healthy	Stage I	Stage II	Stage III	p-Value	Grade A	Grade B	Grade C	p-Value
Sex (N)					0.003 ^a
Women	11	14	39	12		12	47	6	0.038 ^a
Men	20	1	42	11		2	44	8	0.038 ^a
Age mean (SD)	43.32 (12.78)	61.64 (8.10)	54.96 (9.83)	56.00 (9.61)	<0.001 ^b	60.64 (11.17)	55.03 (9.54)	57.21 (8.85)	0.200 ^b
Education level (N)					<0.001 ^a				0.065 ^a
Elementary	0	1	2	0		0	1	2
Middle	2	8	41	19		10	48	10
Post graduate Studies	9	1	4	0		0	5	0
Technical school	0	0	3	31		0	4	0
University	20	5	31	3		4	33	2
Annual dental visit (N)					0.051 ^a				0.680 ^a
Yes	19	14	45	13		9	56	7
No	12	1	36	10		5	35	7
Smoking (N)					0.088 ^a				0.290 ^a
Yes	6	8	26	10		3	34	7
No	25	7	55	13		11	57	7
Normal BMI (N)					0.171 ^a				0.641 ^a
Yes	9	1	21	9		4	22	5
No	22	14	60	14		10	69	9

N: frequency; SD: standard deviation; BMI: body mass index; ^a Pearson Chi-squared test (asymptotic, 2-sided). ^b Welch t-test.