Table 1

Demographic and behavioural characteristics of participants

Characteristic%n*
Median age (IQR), years34.525.7–41.1
Gender and sexual behaviour
 Female10.020
 Men who have sex with men49.598
 Men who have sex exclusively with women40.580
Self-reported ethnicity
 White74.0142
 Black18.316
 Asian5.210
 Other12.524
Highest qualification
 Higher degree31.863
 Degree38.476
 Further education18.737
 Secondary school10.621
 None0.51
Place of birth
 Outside UK53.5107
 UK46.593
English first language
 No32.063
 Yes68.0136
Ever purchased from the internet
 No1.53
 Yes 98.5195
  • *The numbers in categories may not add up to 200 due to missing data items.