SEOUL, Feb. 18 (Yonhap) -- The majority of victims in a deadly humidifier sanitizer scandal that broke out in 2011 are still suffering from various physical and mental illnesses, a report showed Tuesday.

Around 83 percent of the respondents said they suffer from lung-related illnesses, while 71 percent and 56.6 percent are suffering from nasal and skin-related illnesses, respectively, according to the report that surveyed 1,152 families, or 23.3 percent of families who suffered from the health disaster.

Mental symptoms were also on a serious level, with 72 percent suffering depression or anxiety and 71.2 percent experiencing a fall in concentration and memory. A total of 66 percent said they have sleep disorders, while 64.5 percent said they feel anger.

The report raised concerns over their mental health, with 49.9 percent saying they have had suicidal thoughts and 11 percent actually having attempted suicide.

The report, carried out by the Korean Society of Epidemiology and led by the Special Commission on Social Disaster Investigation, is the first major survey on the health conditions of the humidifier sanitizer scandal victims.

The report was based on online and post surveys of the 1,152 families between June 13 and Dec. 20 last year. The research team also conducted focus group interviews and house visits.

The scandal, involving Oxy Reckitt Benckiser, the local unit of British hygiene product maker Reckitt Benckiser Group plc (RB), came to light after four pregnant women died of unknown lung problems in 2011. 

Local authorities launched a probe into the case and concluded that it was caused by polyhexamethylene guanidine, an anti-bacterial agent used in the humidifier cleanser that can be fatal when inhaled in the form of droplets.

mlee@yna.co.kr