Display Settings:

Format

Send to:

Choose Destination
Neurology. 2010 Mar 16;74(11):878-84. doi: 10.1212/WNL.0b013e3181d55f38. Epub 2010 Mar 10.

Smoking duration, intensity, and risk of Parkinson disease.

Author information

  • 1Epidemiology Branch, National Institute of Environmental Health Sciences, 111 T.W. Alexander Dr., PO Box 12233, Mail drop A3-05, Research Triangle Park, NC 27709, USA. chenh2@niehs.nih.gov

Abstract

OBJECTIVE:

To evaluate the relative importance of smoking duration vs intensity in reducing the risk of Parkinson disease (PD).

METHODS:

The study included 305,468 participants of the NIH-AARP Diet and Health cohort, of whom 1,662 had a PD diagnosis after 1995. We estimated odds ratios (OR) and 95% confidence intervals from multivariate logistic regression models.

RESULTS:

Compared with never smokers, the multivariate ORs were 0.78 for past smokers and 0.56 for current smokers. Among past smokers, a monotonic trend toward lower PD risk was observed for all indicators of more smoking. Stratified analyses indicated that smoking duration was associated with lower PD risk within fixed intensities of smoking. For example, compared with never smokers, the ORs among past smokers who smoked >20 cigarettes/day were 0.96 for 1-9 years of smoking, 0.78 for 10-19 years, 0.64 for 20-29 years, and 0.59 for 30 years or more (p for trend = 0.001). In contrast, at fixed duration, the typical number of cigarettes smoked per day in general was not related to PD risk. Close examination of smoking behaviors in early life showed that patients with PD were less likely to be smokers at each age period, but if they smoked, they smoked similar numbers of cigarettes per day as individuals without PD.

CONCLUSIONS:

This large study suggests that long-term smoking is more important than smoking intensity in the smoking-Parkinson disease relationship.

Comment in

PMID:
20220126
[PubMed - indexed for MEDLINE]
PMCID:
PMC2836869
Free PMC Article

Images from this publication.See all images (1)Free text

PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire Icon for PubMed Central
    Loading ...
    Write to the Help Desk