Objectives
To characterize physical and mental diseases and utilization of healthcare services and identify factors associated with mortality among oldest-old patients using the Veterans Health Administration (VHA).
Design
Retrospective study with 5-year survival follow-up.
Setting
VHA system-wide.
Participants
A total of 721,588 veterans using the VHA aged 80 years or older as of October 2008: 80–89 years old (n = 665,249), 90–99 years old (n = 56,118), and 100–115 years old (n = 221).
Measurements
Patient demographics, physical and mental diseases, healthcare services, and 5-year survival were included.
Results
Accelerated failure time models identified protective and risk factors associated with mortality by age group. During a 5-year follow-up period, 44% of patients died with survival rates of 59% for 80’s, 32% for 90’s and 15% for 100’s. In the multivariable model, protective effects for veterans 80–99 were being female, minority race/ethnicity, married, having certain physical and mental diagnoses (hypertension, cataract, dyslipidemia, posttraumatic stress disorder, bipolar disorder), urgent care visits, invasive surgery, and few (1–3) prescriptions. Risk factors were lower VHA priority status, physical and mental conditions (diabetes, anemia, congestive heart failure, dementia, anxiety, depression, smoking, substance abuse disorder), hospital admission, and nursing home care. For those in their 100s, married status, smoking, hospital admission, nursing home care, invasive surgery, and prescription use were significant risk factors; only ED use was protective.
Conclusion
Although the data are limited only to VHA care (thus missing Medicare services), this study shows many veterans served by VHA live to advanced old age despite multiple chronic conditions. Further study is needed to determine whether a comprehensive, coordinated care system like VHA is associated with greater longevity for very old persons.