Table 2. Comparison of the percentage of the pterion types in various population groups by various authors.
| Authors and year of study | Study population | Sample size | Type of pterion (%) | |||
|---|---|---|---|---|---|---|
| SP | FT | S | E | |||
| Saxena et al (2003) 9 | North India | 203 | 84.72 | 10.01 | 5.17 | 0 |
| Oguz et al (2004) 15 | Turkish | 26 | 88 | 10 | 0 | 2 |
| Mwachaka et al (2009) 16 | Kenya | 79 | 66 | 15 | 12 | 7 |
| Adejuwon et al (2013) 17 | Nigeria | 62 | 86.1 | 8.3 | 5.6 | 0 |
| Ruiz et al (2016) 18 | Brazil | 55 | 99 | 5 | 2 | 4 |
| Chaijaroonkhanarak et al (2017) 19 | Thai | 55 | 87.27 | 4.55 | 0 | 8.18 |
| Yameen et al (2018) 3 | North India | 35 | 98.57 | 0 | 1.4 | 0 |
| Sarvaiya et al (2019) 20 | Western India | 326 | 80.21 | 5.22 | 3.68 | 10.89 |
| Present study | North India | 100 | 89 | 4 | 4 | 3 |
Abbreviations: E, epipteric; FT, frontotemporal; S, stellate; SP, sphenoparietal.