Abstract:
BACKGROUND AND PURPOSE:Screening batteries to narrow down a target-at-risk population are essential for trials testing neuroprotective compounds aiming to delay or prevent onset of Parkinson's disease (PD). METHODS:The PRIPS study focuses on early detection of incident PD in 1847 at baseline PD-free subjects, and assessed age, male gender, positive family history, hyposmia, subtle motor impairment and enlarged substantia nigra hyperechogenicity (SN+). RESULTS:After 3 years follow-up 11 subjects had developed PD. In this analysis of the secondary outcome parameters, sensitivity and specificity of baseline markers for incident PD were calculated in 1352 subjects with complete datasets (10 PD patients). The best approach for prediction of incident PD comprised three steps: (i) prescreening for age, (ii) primary screening for positive family history and/or hyposmia, and (iii) secondary screening for SN+. CONCLUSION:With this approach, one out of 16 positively screened participants developed PD compared to one out of 135 in the original cohort. This corresponds to a sensitivity of 80.0%, a specificity of 90.6% and a positive predictive value of 6.1%. These values are higher than for any single screening instrument but still too low for a feasible and cost-effective screening strategy which might require longer follow-up intervals and application of additional instruments.
journal_name
Eur J Neuroljournal_title
European journal of neurologyauthors
Berg D,Godau J,Seppi K,Behnke S,Liepelt-Scarfone I,Lerche S,Stockner H,Gaenslen A,Mahlknecht P,Huber H,Srulijes K,Klenk J,Fassbender K,Maetzler W,Poewe W,PRIPS study group.doi
10.1111/j.1468-1331.2012.03798.xsubject
Has Abstractpub_date
2013-01-01 00:00:00pages
102-8issue
1eissn
1351-5101issn
1468-1331journal_volume
20pub_type
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