TABLE 1.

List of chapters in the International Classification of Functioning, Disability and Health and their level 1 codes

Body functions and structures
b1	Mental functions
b2	Sensory functions and pain
b3	Voice and speech functions
b4	Functions of the cardiovascular, hematological, immunological and respiratory systems
b5	Functions of the digestive, metabolic and endocrine systems
b6	Genitourinary and reproductive functions
b7	Neuromusculoskeletal and movement-related functions
b8	Functions of the skin and related sturctures
s1	Structures of the nervous system
s2	Eye, ear and related structures
s3	Voice and speech structures
s4	Cardiovascular, immunological and respiratory structures
s5	Digestive, metabolic and endocrine structures
s6	Genitourinary and reproductive structures
s7	Structures related to movement
s8	Skin structures
Activity and participation
d1	Learning and applying knowledge
d3	Communication
d5	Self-care
d6	Domestic life
d7	Interpersonal relationships
d8	Major life areas
d9	Community and social life
Environmental factors
e1	Products and technology
e2	Natural environment
e3	Support and relationships
e4	Attitudes
e5	Services, systems and policies

Source: The WHO, 2001