Class 5
86—100%
Speech Impairment
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Can perform none of the articulatory acts necessary for everyday speech communication.
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Functional Efficiency
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Class 1
0—10%
Speech Impairment
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Can meet most of the demands of articulation and phonation for everyday speech communication with adequate speed and ease, although occasionally the patient may hesitate or speak slowly.
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Class 2
11—35%
Speech Impairment
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Can meet many of the demands of articulation and phonation for everyday speech communication with adequate speed and ease, but sometimes gives impression of difficulty, and speech may sometimes be discontinuous, interrupted, hesitant, or slow.
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Class 3
36—60%
Speech Impairment
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Can meet some of the demands of articulation and phonation for everyday speech communication with adequate speed and ease, but often can only sustain consecutive speech for brief periods, may give the impression of being rapidly fatigued.
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Class 4
61—85%
Speech impairment
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Can meet a few of the demands of articulation and phonation for everyday speech communication with adequate speed and ease, such as single words or short phrases, but cannot maintain uninterrupted speech flow; speech is labored, rate is impractically slow.
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Class 5
86—100%
Speech Impairment
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Can meet none of the demands of articulation and phonation for everyday speech communication with adequate speed and ease.
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