Table 6 Prevalence of os trigonum reported in the literature.

From: Accessory foot bones in a Portuguese identified skeletal collection

Reference

Prevalence

Sample size

Frequency basis

Stieda (1889)4

0.8%

120

–

Pfitzner (1896)6

6.1%

841

–

Sewell (1904)48

10.9%

1006

–

Geist (1915)8

–

100

–

Bizarro (1921)45

7.0%

100

Foot

Heimerzheim (1925)49

4.3%

1800

–

Mann and Owsley (1990)20

1.7%

300

–

Cilli and Akcaoglu (2005)14

23.6%

464

–

Coskun et al. (2009)41

2.3%

984

–

Vasiljević et al. (2010)59

2.6%

270

–

Zwiers et al. (2018)15

32.5%

1256

Individual

Kalbouneh et al. (2017)13

15.4%

1000

Individual

Present study

9.9%

485

Individual