Functional Ability

Functional ability is defined as the cognitive, social, physical, and emotional ability to carry on the everyday activities of life.
It encompasses an individual's capacity to:
- Perform usual daily activities required to meet basic needs.
- Fulfill roles in family, workplace, and community.
- Maintain health and well-being.
This definition reflects the adaptive dimension of development, which concerns acquiring skills that enable independence in home and community settings.

Cognitive:
- This domain involves mental processes that affect decision-making, problem-solving, and memory necessary for daily tasks.
Social:
- Involves interpersonal skills and the ability to interact within family and community roles.
Physical:
- Refers to the body strength, mobility, and overall capacity to perform physical activities.
Emotional:
- Pertains to psychological well-being and the ability to manage feelings that influence daily functioning.
Each domain interconnects; impairment in one area can lead to a cascade of effects in others, ultimately impacting overall independence.

Basic Activities of Daily Living (BADLs):
- Skills crucial for self-care, including:
- Hygiene
- Toileting
- Eating
- Ambulating
- These are fundamental self-care tasks required for survival.
Instrumental Activities of Daily Living (IADLs):
- More complex skills necessary for independent living, encompassing:
- Preparing meals
- Shopping
- Taking medications
- Traveling within the community
- Maintaining finances
- Require higher-level cognitive and physical integration compared to BADLs.

Various factors can contribute to a decrease in functional ability, including:
- Developmental abnormalities.
- Physical or psychological trauma or disease.
- Medication effects, such as:
- Drug-drug interactions
- Side effects
- Inappropriate dosages
- Cognitive impairment.
- Depression.
- Social and cultural factors that can hinder functional capabilities.
Other specific medication-related factors include:
- Statins (associated with myalgia)
- Beta-blockers (known to impair endurance)
- Corticosteroids, chemotherapy (linked to muscle weakness).

Functional deficits often associate with adverse health outcomes.
Observable cues include:
- Difficulty performing both BADLs and IADLs independently.
- Requirement for assistance with tasks.
- Increased time to complete activities.
- Decreased effort tolerance in activities.

Primary Prevention:
- Focuses on avoiding functional decline through health promotion and risk reduction strategies before issues arise.
Secondary Prevention:
- Involves early intervention when functional activity is already impaired.
- Emphasizes that earlier intervention leads to better outcomes.
Management strategies can include a multidisciplinary approach, involving:
- Nursing and medicine
- Physical therapy and occupational therapy
- Psychological intervention
- Individual and/or family counseling
- Nutritional consulting
- Speech and language services, audiology services
- Home health or homemaker assistance
- Community services, such as adult or child care
- Support groups and assistive technologies.
The ultimate goal is to prevent functional decline and enhance health-related quality of life for individuals of all ages experiencing chronic illness or disability.

BADLs:
- Comprise fundamental self-care skills necessary for basic survival, such as:
- Hygiene
- Toileting
- Eating
- Ambulating
IADLs:
- Encompass more complex skills essential for functioning independently in the community, including:
- Preparing meals
- Shopping
- Taking medications
- Traveling within the community
- Maintaining finances
IADLs necessitate higher levels of cognitive and physical integration compared to BADLs.

There are two primary types of assessment:
- Performance-based tools (preferred):
- Involve actual observation of a standardized task, judged by objective criteria.
- Provide quantifiable values to track functional ability over time and detect changes due to significant events.
- Self-report instruments:
- Offer information about the patient's perception of their functional ability but come with limitations.
- Individuals may either overstate their capability due to unawareness of gradual changes or understate it due to fear of losing independence or needing long-term care placement.
Key Considerations in Assessment:
- Functional abilities are optimally assessed by observing the individual's function (both children and adults).
- Comprehensive functional assessment is time-intensive, interprofessional, and requires various assessment tools.

Older Adults:
- Comprehensive assessments are necessary when individuals show loss of functional ability, experience changes in mental status, have multiple health conditions, or are frail.
- Regular screening for functional deficits should be part of routine care.
- The SF-36 is recognized as a "gold standard" instrument for measuring physical, mental, and social domains of functional ability.
Children:
- Focus primarily is on developmental milestones and adaptive behavior.
- Children delayed in meeting developmental milestones are often referred for assessments across developmental domains, which include adaptive behavior that parallels functional ability.
Key Differences:
- Assessments in children revolve around acquiring functional skills, whereas assessments in older adults focus on maintaining or losing previously acquired skills.