ALB and dementia: Similarly, pneumonias may be more common in patients with PPU because of reduced muscle mass, poor cough strength, comorbid dementia or cognitive dysfunction, and an inability to be upright in bed.11 To account for these chronic comorbidities, we used propensity score modeling and IPTW to balance dementia, BMI, ASA classification, malnourishment, albumin, independent functional status at baseline, and admitted from a nursing home, among other observed risk factors.