“…One study in the United States found that 27% of firefighters suffered from major depression after participating in a rescue [ 9 ]. Firefighters is also a male-dominated profession, according to the estimation of International Association of Fire and Rescue Services, only about 9% of all firefighters worldwide are female [ 10 ]. Besides, the population of firefighters has a wide age range, a study in the United States has found that almost all America firefighters sent to the front line are between the ages of 20 and 59 [ 11 ].…”