In-hospital outcomes of older patients with gastric cancer and their risk factors: large comprehensive institution-based study.

Purpose: Gastric cancer (GC) is mostly a disease of aging, and older patients with GC are generally frailer. This study aimed to describe the characteristics and in-hospital outcomes, both overall and stratified by gender and resection, and to explore factors associated with outcomes of first hospitalization, in older GC patients.

Methods: Data on GC patients ≥ 65 years hospitalized from January 2016 until December 2020 were retrieved from the electronic medical records of a large tertiary hospital. Patient and tumor characteristics, duration and fee of hospitalization, and in-hospital mortality were described for overall patients and compared by gender and resection. Factors associated with outcomes of first hospitalization were explored using multivariable-adjusted logistic regression.

Results: 3238 eligible patients were analyzed, with a mean age of 71 years and a male proportion of 74%. The median duration and fee of first hospitalization were 13 days and 40,000 RMB, respectively, with a median fee of 17,000 RMB not covered by insurance. 16 (< 1%) and 32 (1%) deaths occurred during first and any hospitalization, respectively, with only 4 (< 1%) perioperative deaths. Compared to male patients, female cases had more often signet-ring-cell carcinoma, reduced food intake, resection, and history of major abdominal surgery. Compared to unresected cases, resected patients had higher body-mass-index and Barthel index, less often reduced food intake, weight loss, and risk of malnutrition, and more often common diet, longer hospital stay, and higher fee. Through multivariable-adjusted analysis, longer first hospital-stay was associated with earlier year of diagnosis, older ages, emergency admission, signet-ring-cell carcinoma, resection, history of anticoagulant intake, larger body-mass-index, non-common diet, and non-low-salt and non-diabetes diets; higher fee of first hospitalization was associated with later year of diagnosis, male gender, older ages, emergency admission, signet-ring-cell carcinoma, and resection.

Conclusions: In this large institution-based study, older GC patients had low in-hospital mortality rates; the insurance coverage needs to be improved. Several characteristics and in-hospital outcomes significantly differed by gender and resection status, and various factors associated with duration and fee of first hospitalization were identified, providing important hints for individualized and stratified geriatric GC care.