Age and gender composition of the reviewed articles

Primary studyGenderAges of participants
MaleFemaleTransgender/Non-binaryAge range and mean age
Wallner et al. [18]51.2%48.2%< 1%
        Germany
        Nigeria
        USA
        Japan		41.4.%
54.4%
50%
50.3%		56.7%
45.2%
50%
48.4%		< 0.5%
< 0.5%
< 0.5%
< 0.5%		Age range 18–24
Age range: 25–34
Age range: 25–34
Age range: 34–44
Nerini et al. [45]-100%-Age range: 18–52
Mean age: 27.1
Bater et al. [33]47.5%52.5%-Age range: 18–52
Mean age: 27.1
Nayyar et al. [26]12.53%82.04%5.43%Breast augmentation: 20–68
Facial rejuvenation: 22–74
Combined breast-abdominal surgery: 21–68
Combined aesthetic: 19–85
Chen et al. [27]26.6%73%0.4%Mean age 24.7
Zargaran et al. [28]4.7%94.1%1.2%Age range: 18–74
Mean age: 42.6
Walker et al. [34]-100%-Age range: 18–29
Mean age: 20.71
Kinney et al. [29]44%55%1%Mean age: 37.19
Sorice et al. [37]1%99%-Age range: 17–78
Mean age: 44/48
Sonmez et al. [41]-100%-Age range: 20–68
Mean age: 35.3
Gesto et al. [42]-100%-Age range: 19–32
Mean age: 23
Age rangesPercent of sample
Alhujayri et al. [39]13%87%-18–24
25–30
31–40
> 40		39%
22%
22%
18%
Alhusaini et al. [40]17.9%82.1%-< 25
25–35
36–45
46–55
> 55		41.1%
22%
20.1%
13.5%
3%
Alkhathami et al. [43]-100%-< 18
18–23
24–30
31–40
< 40		3%
65.8%
16.2%
7.5%
7.5%
Seekis and Barker [44]-100%-17–25100%
Ateq et al. [46]30%70%-18–24
25–29
30–39
> 40		38%
24%
28%
10%
Dengre et al. [25]14%86%-20–29
30–39
40–49
50–59
≥ 60		14%
50%
33%
0%
3%
de Vries et al. [24]49.3%50.7%-11–18100%
Almajnoni et al. [30]15%85%-< 18
18–25
26–30
> 30		6%
63%
14%
17%
Sindi et al. [31]23.3%76.7%-18–29
30–39
40–49
> 50		68.8%
11.0%
12.6%
7.5%
Hermans et al. [36]44%55.6%0.4%18–25100%
Sayegh et al. [32]30.6%69.4%-18–34
35–54
> 55		68.39%
28.76%
2.85%
Tirrell et al. [23]No comment on the gender/age of post authors
Ben-Naftali et al. [19]No comment on the gender/age of post authors
Mullens et al. [20]No comment on the gender/age of post authors
Timberlake et al. [38]No comment on age/gender, studied family groups
Egan et al. [21]No comment on the gender/age of post authors
Çınar et al. [22]No comment on the gender/age of post authors

Six articles reviewed social media postings and did not comment on the age, gender, or both of the authors of the posts. For reference 18, due to very few people did not complete the survey, so the percentage sum is less than 100%