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Table 13-16
Criteria for Rating Neurogenic Respiratory Dysfunction
CLASSCLASS 0CLASS 1CLASS 2CLASS 3CLASS 4CLASS 5
WHOLE PERSON IMPAIRMENT RATING (%) 0% 1%–5% 6%–20% 21%–35% 36%–50% 51%–65% 
DESCRIPTION No neurologic impairment of respiration Individual can breath spontaneously but has difficulty performing ADLs that require intensive effort such as running Individual is capable of spontaneous respiration but is restricted to any exertional activity such as hill climbing or prolonged exertion Individual is capable of only sedentary activities Tracheostomy Individual has no capacity for spontaneous respiration, is ventilator dependent 
CLASSCLASS 0CLASS 1CLASS 2CLASS 3CLASS 4CLASS 5
WHOLE PERSON IMPAIRMENT RATING (%) 0% 1%–5% 6%–20% 21%–35% 36%–50% 51%–65% 
DESCRIPTION No neurologic impairment of respiration Individual can breath spontaneously but has difficulty performing ADLs that require intensive effort such as running Individual is capable of spontaneous respiration but is restricted to any exertional activity such as hill climbing or prolonged exertion Individual is capable of only sedentary activities Tracheostomy Individual has no capacity for spontaneous respiration, is ventilator dependent 
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