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Charcoal burning suicides in Hong Kong between 2002-2004 in the 15 to 59-year-old age group were investigated using the psychological autopsy method. The psychopathological profiles of charcoal burning suicides (N = 53) were compared against 'other suicides' (N = 97). The two groups did not differ significantly in the prevalence of DSM-IV axis I diagnoses with the exception of schizophrenic spectrum disorder which was less frequently associated with charcoal burning suicides. Score on 'neuroticism' in the NEO-five Factor Inventory (NEO-FFI) was significantly higher in victims of charcoal burning suicide. There was also a trend toward higher score on 'conscientiousness' in the NEO-FFI among charcoal burners than victims of other suicide.

Classification of suicides is essential for clinicians to better identify self-harm patients with future suicidal risks. This study examined potential subtypes of suicide in a psychological autopsy sample (N = 148) in Hong Kong. Hierarchical cluster analysis extracted two subgroups of subjects in terms of expressed deliberation assessed by the Beck Suicide Intent Scale (SIS). The first group was associated with charcoal burning suicide, no psychiatric illness, indebtedness, better problem-solving ability, chronic stress, and higher overall SIS scores. The second group was associated with jumping from a height, psychotic disorders, psychiatric treatment, acute stress, and lower overall SIS score. The existence of a substantial cluster of subjects with lower expressed intent and preparation has important implications for the performance of the SIS as a predictive tool. Suicide prevention strategy may have to target potential subgroups with specific approaches.