Table 5. Comparison of prevalence rate of oral tori from different studies.

Study	Year	Geographic area	Sample size,	Population	TP, % (female)	TM, % (female)	Age, year
Eggen et al. [36]	1986	Norwegian	829	Nonuremic	32.8 (68.3)	27.5 (54.5)
Reichart et al. [24]	1988	German	1317	Nonuremic	13.5 (60.1)	5.2 (24.6)	1->80
Reichart et al. [24]	1988	Thailand	947	Nonuremic	23.1 (70.8)	9.2 (56.3)	1->80
Haugen et al. [26]	1992	Norway	5000	Nonuremic	9.2 (67.6)	7.2 (49.0)	16–89
Eggen et al [30]	1994	Norwegian	1181	Nonuremic	38.4 (60.1)	12.7 (43.1)
Gorsky et al. [13]	1996	Israel	1002	Nonuremic	21.0 (63.9)		4–40*
Al-Bayaty [3]	2001	India	667	Nonuremic	9.4 (73.0)	5.7 (55.2)	11–50
Bruce et al. [28]	2004	Ghana	926	Nonuremic	3.9 (74.2)	12.1 (55.2)
Yildiz et al. [20]	2005	Turkey	1943	Nonuremic	30.9 (50.7)		5–15
Jainkittivong et al. [14]	2007	Thailand	1520	Nonuremic	60.5 (62.8)	32.2 (48.1)	10–60
Sisman et al. [21]	2008	Turkey	2660	Nonuremic	4.1 (81.8)		13–85
Yoshinaka et al. [19]	2010	Japan	664	Nonuremic	17.0 (80.5)	29.7 (46.7)	60–82
Simunkovic et al [31]	2011	Croatia	1679	Nonuremic	42.9 (54.8)	12.6 (52.6)	9–99
Hiremath et al. [25]	2011	Malaysia	65	Nonuremic	50.8 (90.9)	4.6 (66.7)	13–59
Sisman et al. [8]	2012	Turkey	91	Uremic	41.7 (55.3)		19–81
Sathya et al. [23]	2012	Malaysia	1532	Nonuremic	12.0 (64.7)	2.8 (65.1)	10->40
Chiang et al. [29]	2014	Taiwan	2050	Nonuremic	21.1 (76.2)	24.2 (52.1)	<18->65
Chao et al. [9]	2014	Taiwan	119	Uremic	23.5(56.2)	6.7 (41.7)	9–90
Present study	2015	Taiwan	135	Uremic	40.3(63.0)	8.2 (54.5)	9–81.7.9

Note: Note: TP torus palatinus, TM torus mandibularis

* radiographic study