Blindness or serious visual impairment

Deaf-mutism

Physical defect, mutilation, deformity, invalidity

Some type of mental deficiency

Serious mental disorders

Chronic disease

The overall situation is summarised in a general variable with three categories:

Health disorders (the person suffers from one or more disorders)

Some chronic disease (the person suffers from some chronic disease)

No chronic disease (the person does not suffer from any of the above)