Table 1

Demographic and behavioural characteristics of participants

Median age (IQR), years34.525.7–41.1
Gender and sexual behaviour
 Men who have sex with men49.598
 Men who have sex exclusively with women40.580
Self-reported ethnicity
Highest qualification
 Higher degree31.863
 Further education18.737
 Secondary school10.621
Place of birth
 Outside UK53.5107
English first language
Ever purchased from the internet
 Yes 98.5195
  • *The numbers in categories may not add up to 200 due to missing data items.