An IADL, or instrumental activity of daily living, is a task that allows a person to live independently in their community. In nursing, IADLs refer to a specific set of eight complex daily tasks, such as managing medications, preparing meals, and handling finances, that nurses assess to determine how much support a patient needs at home. These are distinct from basic ADLs like bathing, dressing, and eating, which cover fundamental self-care. IADLs require higher-level thinking, organization, and the ability to navigate the world beyond the bedroom or bathroom.
The Eight IADL Domains
The standard framework for measuring IADLs comes from the Lawton-Brody scale, developed in 1969 and still widely used today. It evaluates eight specific domains:
- Using a telephone: looking up numbers, dialing, answering calls
- Shopping: getting to a store and selecting needed items
- Food preparation: planning and cooking meals
- Housekeeping: maintaining a reasonably clean living space
- Laundry: washing and managing clothing
- Transportation: driving, using public transit, or arranging rides
- Managing medications: taking the right doses at the right times
- Handling finances: paying bills, managing a bank account, budgeting
Each domain is scored based on how much assistance the person requires. The total score ranges from 0 (fully dependent) to 8 (fully independent). A higher score means the person can manage more of their daily life without help.
How IADLs Differ From Basic ADLs
Basic ADLs cover the physical self-care tasks a person needs to survive: eating, bathing, dressing, toileting, transferring (moving from a bed to a chair, for example), and maintaining continence. These are body-level tasks. You can think of them as what someone needs to do to get through the day in a single room.
IADLs are a step up in complexity. They require planning, decision-making, and interaction with the outside world. A person who can bathe and dress independently might still struggle to grocery shop, pay bills on time, or remember to take medications correctly. This distinction matters in nursing because many people who lose IADL abilities still handle basic ADLs just fine. IADL problems tend to appear first, making them an early signal that someone’s functional capacity is declining.
Why Nurses Assess IADLs
IADL assessment gives nurses a practical picture of whether a patient can safely return home or needs additional support. Research shows that IADL and ADL scores are often better predictors of where a patient ends up after discharge than traditional medical indicators. In one study of 309 patients in acute care rehabilitation, those discharged home had significantly higher IADL scores than those transferred to another facility. Patients who couldn’t manage complex daily tasks were far more likely to need ongoing institutional care.
This makes IADL assessment a cornerstone of discharge planning. If a patient scores low in meal preparation and medication management, for example, a nurse can coordinate home health services, set up a medication management system, or recommend a higher level of care. The assessment turns a vague concern about “how they’ll manage at home” into specific, actionable gaps that can be addressed before discharge.
IADLs as an Early Sign of Cognitive Decline
One of the most clinically significant uses of IADL assessment is screening for dementia. People in the early stages of dementia often show IADL decline before they fail standard cognitive tests. Tasks like managing finances, keeping track of medications, and navigating transportation require complex cognitive processing, and they tend to break down early in the disease process.
A study published in Age and Ageing found that the Lawton IADL scale had a sensitivity of 89% and specificity of 81% for identifying dementia in adults over 65, performance comparable to established cognitive screening tools like the Mini-Mental State Examination. When IADL scores were combined with a separate informant questionnaire, specificity jumped to 93% and overall accuracy reached 92%. Multiple longitudinal studies have also found that IADL performance predicts who will develop dementia in the future, not just who already has it.
For nurses, this means that a patient who suddenly can’t manage their bills or keeps missing medications isn’t just having a bad week. That pattern of decline is worth flagging and tracking over time.
How the Assessment Works in Practice
A nurse conducting an IADL assessment typically asks the patient (or a family member) about each of the eight domains. The questions focus on what the person actually does, not what they could theoretically do. For each domain, the response falls on a scale from fully independent to completely unable to perform the task. The result is a score that highlights exactly which areas need support.
The original Lawton-Brody scale was designed with a maximum score of 8 for women and 5 for men, reflecting 1960s assumptions about gender roles (men were not expected to cook or do laundry at the time). Most modern clinical settings score all patients on the full 0 to 8 scale regardless of gender, though you may still encounter the original scoring in older documentation or certain standardized forms.
IADLs are commonly reassessed at key transitions: hospital admission, before discharge, during home health visits, and at routine checkups for older adults. Tracking scores over time reveals trends that a single snapshot might miss.
Technology and Modern IADLs
The eight classic IADL domains were defined over 50 years ago, and daily life has changed considerably since then. Managing health now often involves patient portals, telehealth appointments, and prescription apps. Banking has shifted heavily online. Shopping increasingly happens through websites and delivery services. These digital versions of traditional IADLs require their own set of skills, and a person who could once handle finances in person may struggle with online banking.
Mobile apps can also serve as IADL supports. Recipe and diet apps assist with meal planning, ride-hailing apps replace the need to drive or navigate bus routes, and medication reminder apps help with adherence. For older adults who can learn to use them, these tools can extend independence in domains where physical or cognitive abilities have started to slip. Nurses working with older patients increasingly factor digital literacy into their IADL assessments, recognizing that the ability to interact with technology now directly affects a person’s ability to live independently.
Matching IADL Deficits to Support Services
Each IADL deficit points to a specific type of community support. A person who can’t prepare meals may benefit from meal delivery programs or congregate dining at a senior center. Someone who can no longer manage transportation might need paratransit services or volunteer driver programs. Financial management difficulties can be addressed through representative payee arrangements or bill-pay services. Medication management problems often lead to home health nursing visits, pill organizers with alarms, or pharmacy-based blister packaging.
The value of the IADL framework for nurses is this specificity. Rather than a general recommendation that someone “needs help at home,” IADL assessment produces a targeted list of functional gaps. That list drives the care plan, shapes referrals, and gives families a concrete understanding of what their loved one can and cannot do safely on their own.