Male university students | Males aged 18–30 years attending medical or non-medical university |
Female university students | Females aged 18–30 years attending medical or non-medical university |
Women working in entertainment industry | Women aged 18–45 years who work at karaoke bars located in downtown Shanghai |
Married women | Women aged 20–45 years residing in urban Shanghai who are married |
Married men | Men aged 20–45 years residing in urban Shanghai who are married |
Migrant women | Married women aged 20–45 years working in rural areas (Ming Hang, Jiading and Hongqiao) who were not born in their current area of employment and who have lived in their current location for at least 6 months |
Migrant men | Married men aged 22–45 years working in Ming Hang, Jiading and Hongqiao who were not born in their current area of employment and who have lived in their current location for at least 6 months |
College-educated young women | Women aged 22–35 years who have attended some college or university and who are currently working at companies based in Shanghai |
College-educated young men | Men aged 22–35 years who have attended some college or university and who are currently working at companies based in Shanghai |