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Liu et al. (2017) investigated caregiver burden of patients with frontotemporal lobar degeneration (FTD) and dementia with Lewy bodies (DLB), which was compared with caregivers of patients with Alzheimer's disease. The authors concluded that the frequency and severity of behavioral disturbances in caregiver of patients with FTD and DLB were higher than those with caregivers of patients with Alzheimer's disease. I have some concerns about their study.
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.
Arnaoutoglou et al. (2017) reported that “Ishihara Color Vision Test – 38 Plate” was useful for the differential diagnosis of dementia between Alzheimer's Disease (AD) and Vascular Dementia (VaD). The authors used sensitivity/specificity analysis, presenting 80.6% and 87.5% to discriminate AD and VaD patients when an optimal (32.5) cut-off value of performance was used. The authors cited a reference of the fact that AD patients suffered from a non-specific type of color blindness (Pache et al., 2003), and I have a query on their study with special reference to statistical method.