Table 2.
Studies included in the analysis of sexual orientation
| Study reference | Year | Sample | Mean Age | Technique |
|---|---|---|---|---|
| Abé et al | 2014 | 19 HoM–21 HeM–21 HeW | 33.5–31.9–33.2 | MRI |
| Berglund et al | 2006 | 12 HoW–12 HeW–12 HeM | 33–26–28 | PET |
| Hu et al | 2013 | 26 HoM–26 HeM | 22.27–23.46 | rs-fMRI |
| Hu et al | 2014 | 26 HoM–26 HeM | 22.27–23.46 | rs-fMRI |
| Hu et al | 2011 | 14 HoM–14 HeM | Not reported | fMRI |
| Hu et al | 2008 | 10 HoM–10 HeM | 26.5–27.9 | fMRI |
| Kagerer et al | 2011 | 11 HoM–10 HeM | All sample 28 | fMRI |
| Kinnunen et al | 2004 | 8 HoM–7 HeM | 29–28 | PET |
| Manzouri-Savic | 2018 | 30 HoM–30 HoW–40 HeM–40 HeW | 31.4–27.9–29.5–29.3 | MRI and rs-fMRI |
| Paul et al | 2008 | 12 HoM–12 HeM | 32–34.8 | fMRI |
| Perry et al | 2013 | 12 HoM–12 HoW–13 HeM–15 HeW | All sample 28.46 | fMRI |
| Ponseti et al | 2009 | 14 HoM–12 HeM | 27.4–26.8 | fMRI |
| ponseti et al | 2007 | 16 HoM–15 HoW–24 HeM–25 HeW | 27.3–24.9–25.3–24.9 | MRI [VBM] |
| Safron et al | 2017 |
22 HoM–23 HeM 22 HoM–19 HeM |
33.2–32.3 Not reported |
fMRI [picture] fMRI [video] |
| Safron et al | 2018 |
20 HoW–20 HeW 20 HoW–18 HeW |
29–29.7 Not reported |
fMRI [picture] fMRI [video] |
| Savic et al | 2005 | 12 HoM–12 HeM–12 HeW | 33–28–26 | PET |
| Savic-Lindström | 2008 |
20 HoM–20 HoW–25 HeM–25 HeW 12 HoM–12 HoW–13 HeM–13 HeW |
32–20–30–31 Not reported |
MRI PET |
| Sylva et al | 2013 | 12 HoM–11 HoW–12 HeM–11 HeW | All sample 22.1 | fMRI |
| Witelson et al | 2008 | 12 HoM–10 HeM | 25.4–23.3 | MRI |
| Zeki-Romaya | 2010 | 6 HoM–6 HoW–6 HeM–6 HeW | All sample 26.3 | fMRI |
| Zhang et al | 2011 | 16 HoM–16 HeM | 26.4–27.7 | fMRI |
HoM, homosexual men; HoW, homosexual women; HeM, heterosexual men; HeW, heterosexual women