A City Guide To Nanchong for No effect of socio-economic environment or gender was found in terms of perceived health consequences. Threats to health The major threats to health were perceived to be poor lifestyle behaviour such as smoking, doing drugs, drinking and eating unhealthily. Age effects showed that perceptions of threat change significantly with age, particularly between the ? and ? age groups. Taking drugs and smoking was most commonly reported in the ? and ? age groups, whereas eating bad foods was most common in the youngest children ? years. Dangerous behaviour and road safety issues were of greater concern to the younger children. Socioeconomic environment interacted with age to affect the extent to which unhealthy eating was an issue. No effects were found for gender in terms of what was perceived as health threats. A City Guide To Nanchong 2016.