Table 3

Study characteristics

Type of studyStudy
Quantitative (n=36)16–18 20–22 24–26 28–35 42 44–46 48 51 53 55 56 58–61 64 65 68 70 72–74
Qualitative (n=19)19 23 36–41 43 49 50 52 54 57 62 63 66 67 69
Mixed methods (n=3)27 47 71
Country of originStudy
United Kingdom (n=9).18 24 25 41 47 49 50 58 71
Taiwan (n=9).21 33–36 61 63 65 68
Switzerland (n=6).19 23 26 29 44 54
United States of America (n=6).51 59 62 66 70 73
Saudi Aribia (n=5).20 48 56 64 72
Netherlands (n=3).22 39 45
Australia (n=2)40 74
Canada (n=2).32 67
Sweden (n=2).43 46
Bahrain (n=1).65
China (n=1).69
Denmark (n=1).42
Hawaii (n=1).55
Iran (n=1).53
Ireland (n=1).27
Israel (n=1).58
Japan (n=1).28
Jordan (n=1)60
Korea (n=1)30
Middle East (n=1)31
New Zealand (n=1)57
USA and UK combined (n=1)52
Argentina, Australia, Austria, Barbados, Belgium, Brazil, Brunei, Canada, Colombia, Cuba, Denmark, France, Germany, Greece, Hong Kong, Hungary, Iceland, India, Ireland, Israel, Italy, Japan, Lebanon, Malaysia, Malta, Netherlands, New Zealand, Norway, Pakistan, Poland, Puerto Rico, Saudi Arabia, Singapore, South Africa, South Korea, Spain, Sri Lanka, Sweden, Switzerland, Taiwan, UAE, Uganda, USA (n=1)17