Table 5.7Diagnostic accuracy of acute apomorphine and levodopa challenge testing in de novo PD cases79

Test(N)Positive predictive value (95% confidence interval)Grade
Acute apomorphine (1.5–5 mg)1870.63 (95% CI 0.56 to 0.70)DS II
Acute levodopa (125–275 mg)670.69 (95% CI 0.59 to 0.80)
Chronic levodopa (<1000 mg)2090.76 (95% CI 0.70 to 0.82)

From: 5, Diagnosing Parkinson’s disease

Cover of Parkinson's Disease
Parkinson's Disease: National Clinical Guideline for Diagnosis and Management in Primary and Secondary Care.
NICE Clinical Guidelines, No. 35.
National Collaborating Centre for Chronic Conditions (UK).
Copyright © 2006, Royal College of Physicians of London.

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