Weight Loss and Weight Gain: Multi-Level Determinants Associated with Resident 3-Month Weight Change in Long-Term Care.

This study examined factors associated with weight change in 535 residents in 32 long term care homes where 3-month weight records were available. Trained researchers and standardized measures (e.g., nutrition status, food intake, home characteristics) were used to collect data; weight change was defined as ±2.5%. Just over 25% of the sample lost and 21% gained weight. Weight stability was compared to loss or gain. Weight loss was associated with being male, malnourished (MNA-SF or BMI <25), energy and protein intake and oral nutritional supplement use, while weight gain was associated with being female, and a physically (e.g., less noise) and socially supportive dining room. Weight stability was associated with better cognition. A high proportion of residents had a significant weight change in 3 months. Modifiable factors associated with weight stability or gain suggest focusing interventions that promote food intake and improve the mealtime environment.