TY - JOUR
T1 - Risk of Parkinson's disease among first-degree relatives
T2 - A community- based study
AU - Marder, K.
AU - Tang, M. X.
AU - Mejia, H.
AU - Alfaro, B.
AU - Côté, L.
AU - Louis, E.
AU - Groves, J.
AU - Mayeux, R.
PY - 1996/7
Y1 - 1996/7
N2 - Objective: To determine the relative risk (RR) and cumulative incidence of idiopathic Parkinson's disease (PD) in first-degree relatives of PD patients compared with relatives of controls from the same geographic region. Design: A family history questionnaire was used to obtain information on all first-degree relatives of cases and controls. A subset of these first-degree relatives was also examined. A Cox proportional hazards model with double- censoring techniques for missing information was used to model the RR for PD, adjusting for gender, ethnicity, and relationship to proband. Results: A total of 1,458 first-degree relatives of 233 PD patients were 2.3 times as likely (95% CI = 1.3 to 4.0) as 7,834 relatives of 1,172 controls to develop PD. The cumulative incidence of PD to age 75 among first-degree relatives of PD patients was 2% compared with 1% among first-degree relatives of controls. The risk in male first-degree relatives was higher than in female relatives (RR = 2.0, 95% CI = 1.1 to 3.4) and the risk in relatives of Caucasians was higher than in African-Americans and Hispanics (RR = 2.4, 95% CI = 1.4 to 4.1). Risk for siblings and parents of probands was similar. Conclusions: Susceptibility to PD is increased in first-degree relatives of both sporadic and familial cases. The pattern of inheritance and the relationship between genetic and environmental risk factors warrant further study.
AB - Objective: To determine the relative risk (RR) and cumulative incidence of idiopathic Parkinson's disease (PD) in first-degree relatives of PD patients compared with relatives of controls from the same geographic region. Design: A family history questionnaire was used to obtain information on all first-degree relatives of cases and controls. A subset of these first-degree relatives was also examined. A Cox proportional hazards model with double- censoring techniques for missing information was used to model the RR for PD, adjusting for gender, ethnicity, and relationship to proband. Results: A total of 1,458 first-degree relatives of 233 PD patients were 2.3 times as likely (95% CI = 1.3 to 4.0) as 7,834 relatives of 1,172 controls to develop PD. The cumulative incidence of PD to age 75 among first-degree relatives of PD patients was 2% compared with 1% among first-degree relatives of controls. The risk in male first-degree relatives was higher than in female relatives (RR = 2.0, 95% CI = 1.1 to 3.4) and the risk in relatives of Caucasians was higher than in African-Americans and Hispanics (RR = 2.4, 95% CI = 1.4 to 4.1). Risk for siblings and parents of probands was similar. Conclusions: Susceptibility to PD is increased in first-degree relatives of both sporadic and familial cases. The pattern of inheritance and the relationship between genetic and environmental risk factors warrant further study.
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U2 - 10.1212/WNL.47.1.155
DO - 10.1212/WNL.47.1.155
M3 - Article
C2 - 8710070
AN - SCOPUS:0030056696
SN - 0028-3878
VL - 47
SP - 155
EP - 160
JO - Neurology
JF - Neurology
IS - 1
ER -