Unplanned Weight Loss in Aged Care

What is Unplanned Weight Loss?

Unplanned weight loss occurs in aged care settings when an older person experiences an unintentional reduction in body mass. In these cases, there is no written strategy or ongoing record advising planned weight loss (DoHaAC 2025b).

According to the National Aged Care Mandatory Quality Indicator Program, there are two categories of unplanned weight loss:

1. Significant unplanned weight loss, where a person loses greater than or equal to 5% of their body weight within three months.
2. Consecutive unplanned weight loss, where a person loses any amount of weight every month for three months in a row.

(DoHaAC 2025b)

For example:

Consider a person who initially weighed 80 kg.

• After one month, they weigh 79 kg.
• After two months, they weigh 77.5 kg.
• After three months, they weigh 76 kg.

The person lost 5% of their body weight (4 kg) within three months and lost some amount of weight for three consecutive months. Therefore, they have experienced both significant and consecutive unplanned weight loss.

Note: Interventions may be required if an older person has a BMI of <20 (if under 70 years of age) or <22 (if over 70 years of age) (Vic DoH 2023).

Causes of Unplanned Weight Loss in Older People

It’s estimated that up to 68% of aged care clients are malnourished or at risk of malnutrition (RCACQS 2021).

Weight loss often occurs when daily nutritional requirements are not being met. There are many factors that can contribute to this, including social, physical, psychological, and emotional influences, as well as the care setting itself.

Examples may include:

• Social causes: Loss of choice, social withdrawal, eating alone, limited communication, cultural and/or religious factors
• Physical causes: Illness, medication-related, chewing and swallowing difficulties, reduced intake, oral health, dentures, changes in taste or smell
• Psychological and emotional causes: Mood disorders, cognitive impairment, grief, loss of enjoyment
• Care setting causes: Limited staff to assist with eating, limited food choices, inadequate nutritional content, food quality

(DoHaAC 2025b; RCACQS 2021)

Consequences of Unplanned Weight Loss

Unplanned weight loss is a sign of malnutrition and can lead to:

• Increased susceptibility to illness
• Reduced ability to fight infection
• Frailty
• Loss of independence
• Decreased emotional and social health
• Impaired thermoregulation
• Reduced ability to exercise
• Increased risk of fractures and osteoporosis
• Impaired wound healing and increased risk of pressure injury
• Impaired elimination (e.g. dehydration, constipation, inability to regulate salt and fluid, over-hydration, bowel function impairment)
• An overall decrease in quality of life
• In extreme cases, even death.

(DoHaAC 2025b)

Unplanned Weight Loss as a Quality Indicator

Being able to detect and manage unplanned weight loss in older people is essential.

Unplanned weight loss is common among older people and poses serious risks. For this reason, it is a key quality indicator under the National Aged Care Mandatory Quality Indicator Program (QI Program).

The QI program outlines specific indicators that all government-subsidised aged care facilities must report on to measure the quality and safety of their services and facilitate continuous improvement (My Aged Care 2022).

Under this program, all older people receiving residential aged care should be weighed monthly (DoHaAC 2025a).

Raw data about each consenting older person’s weight must be submitted to the Government Provider Management System (GPMS) every quarter (replacing the My Aged Care Provider Portal) (DoHaAC 2025a).

Note: The following care recipients do not need to have their weight data submitted to the QI Program:

• Older people who withhold consent to being weighed
• Older people receiving end-of-life care
• Older people who do not have the required weights recorded (e.g. starting and/or finishing weight).

(DoHaAC 2025a)

The provider must report the number of care recipients excluded due to being in one of the above categories (DoHaAC 2025a).

Weighing Clients

To ensure that weight data is as accurate as possible:

• Weigh each person at a similar time of day every month
• Ensure people wear clothing of a similar weight every month
• Use the same scale every month
• Ensure the scale is calibrated.

(Vic DoHAC 2025a)

Unplanned Weight Loss Under the Strengthened Aged Care Quality Standards

The Strengthened Aged Care Quality Standards require unplanned weight loss to be assessed and managed.

• Standard 5: Clinical Care - Outcome 5.5: Safety of clinical care services (Action 5.5.5) requires processes to support each individual's nutritional and hydration needs. This includes conducting regular malnutrition screenings, managing the impact of chronic conditions on nutrition, and responding promptly when a resident is at risk of malnutrition or has experienced malnutrition, unplanned weight loss, or unplanned weight gain.
• Standard 6: Food and Nutrition - Outcome 6.1: Partnering with individuals on food and drinks (Action 6.1.2) requires processes to continuously improve food and drink services based on individual satisfaction, ensure dietary intake meets each person's nutritional requirements, and apply contemporary, evidence-based practice in all aspects of nutrition care.

(ACQSC 2025a)

The Quality Standards also reiterate the requirement to report unplanned weight loss as part of the QI Program (ACQSC 2025a).

Brief Standardised Care Process for Unplanned Weight Loss

Note: This is the standardised care process for Victoria. Other jurisdictions may differ.

1. Conduct a nutritional assessment of all older people upon admission. This should comprise:
   • Dietary history
   • Medical history
   • Physical examination
   • Social factors
   • Functional ability.
2. Recognise any signs of weight loss. Intervene if:
   • There is any unplanned weight loss detected
   • The person’s BMI is <20 (if under 70 years of age) or <22 (if over 70 years of age)
   • The person’s oral intake has been under 50% of their requirement for more than three days
   • Sudden weight loss is detected - this requires urgent escalation of care.
3. Determine appropriate interventions.
   • Refer the person to relevant specialists (e.g., general practitioner, dietitian, speech pathologist, occupational therapist, pharmacist, dentist).
   • Ensure the person is being weighed monthly as per the QI Program. Reweigh the client more frequently if weight loss is detected.
   • Routinely assess whether interventions are working effectively.
   • Discuss the older person’s food and mealtime preferences. Provide them with information about nutrition and maintaining nutritional status.
   • Ensure staff are appropriately trained in regards to:
     • Nutrition in older people
     • Malnourishment risk factors
     • How to create a positive dining environment
     • How to assist people with eating and drinking
     • Religious and cultural food preferences and choices.

(Vic DoH 2023)

Preventing Unplanned Weight Loss in Older People

By regularly monitoring older people’s weight, staff should be able to promptly identify and address weight changes.

Interventions for preventing weight loss may include:

(Vic DoH 2023)