Koo et al. (2017) compared differences in sociodemographic variables, recent life events, and mental and physical illnesses between three age groups (65–74 years, 75–84 years, and 85 years and over) who died by suicide. Psychiatric problems, suicidal behavior, legal and financial stressors, and relationship problems decreased with age. In contrast, physical conditions and bereavement increased with age. Suicide rates were increasing with age for males, but not for females. In addition, significant differences in the prevalence of potential risk factors within the three different age groups existed. I have some concerns about their study.