WHO Guide to Mental and Neurological Health in Primary Care
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Diagnostic features

Slow or incomplete mental development resulting in:

  • learning difficulties
  • social adjustment problems (which are present from early in life).

The range of severity includes:

  • severe learning disability (usually identified before two years of age. The individual requires help with daily tasks throughout life and is capable of only simple speech)
  • moderate learning disability (usually identified between ages three to five. The individual is able to do simple work with support, and needs guidance or support in daily activities)
  • mild or borderline learning disability (usually identified during school years. The individual is limited in school work, but is able to live alone and maintain some form of paid employment).

Last edited: 2/2/2004


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