Table 1.

Characteristics of the study population; mean values ± 1 SD and range/percent in brackets, as a whole and divided into high anxiety (HA) and low anxiety (LA) groups

	All participants	LA group	HA group	p-value
Age	51.6 ± 17.2	55.5 ± 17.0	42.7 ± 14.7	0.018
	(26–83)	(26–83)	(26–77)
Number of teeth	25.7 ± 4.2	26.9 ± 4.2	24.5 ± 3.9	0.946
	(13–32)	(14–32)	(13–31)
Years in treatment at University Clinic	3.7 ± 3.0	3.8 ± 2.9	3.6 ± 3.2	0.895
	(1–11)	(1–9)	(1–11)
Dental Hygiene appointments, total	7.4 ± 6.9	7.7 ± 6.7	6.7 ± 7.6	0.716
	(1–27)	(1–26)	(1–27)
Dental Hygiene Appointments/year	3.5 ± 3.2	3.6 ± 3.8	3.3 ± 2.3	0.789
	(1–15)	(1–15)	(1–10)
Periodontal classification				0.005
Gingivitis	22 (47.8 %)	11 (34.4 %)	11 (78.6 %)
Periodontitis	24 (52.2 %)	21 (65.6 %)	3 (21.4 %)
Periodontal Surgery				0.913
Yes	3 (6.5 %)	2 (6.3 %)	1 (7.1 %)
No	43 (93.5 %)	30 (93.8 %)	13 (92.9 %)
Implants				0.237
Yes	12 (26.1 %)	10 (31.3 %)	2 (14.3 %)
No	34 (73.9 %)	22 (68.8 %)	12 (85.7 %)
Restorations				0.073
None	3 (6.5 %)	3 (9.4 %)	0
Single per Quadrant	4 (8.7 %)	0	4 (28.6 %)
Multiple per Quadrant	9 (19.6 %)	4 (12.5 %)	5 (35.7 %)
Multiple per Quadrant + crowns/bridges	30 (65.2 %)	25 (78.1 %)	5 (35.7 %)
Extractions				0.324
Yes	39 (84.8 %)	26 (81.3 %)	13 (92.9 %)
No	7 (15.2 %)	6 (18.8 %)	1 (7.1 %)
Root canal treatment				0.514
Yes	1 (2.2 %)	1 (3.1 %)	0
No	45 (97.8 %)	31 (96.9 %)	14 (100 %)