Olfactory dysfunction in Parkinson's disease: Positive effect of cigarette smoking.
Olfactory dysfunction in Parkinson's disease: Positive effect of cigarette smoking.
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DOI:
10.1002/mds.26126
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发表时间:
2015-05
影响因子:
8.6
通讯作者:
Doty, Richard L.
中科院分区:
文献类型:
--
作者:
Sharer, James D.;Leon-Sarmiento, Fidias E.;Morley, James F.;Weintraub, Daniel;Doty, Richard L.
There is compelling evidence from over 60 epidemiological studies that smoking significantly reduces the risk of Parkinson’s disease (PD). In general, those who currently smoke cigarettes, as well as those with a past history of such smoking, have a reduced risk of PD compared to those who have never smoked. Recently it has been suggested that a cardinal non-motor sensory symptom of PD, olfactory dysfunction, may be less severe in PD patients who smoke than in PD patients who do not, in contrast to the negative effect of smoking on olfaction described in the general population. We evaluated University of Pennsylvania Smell Identification Test (UPSIT) scores from 323 Parkinson’s patients and 323 controls closely matched individually on age, sex, and smoking history (never, past, current). The patients exhibited much lower UPSIT scores than did the controls (P<0.0001). The relative decline in dysfunction of the current PD smokers was less than that of the never- and past-PD smokers (respective Ps=0.0005 & 0.0019). The female PD patients outperformed their male counterparts by a larger margin than did the female controls (3.66 vs. 1.07 UPSIT points; respective Ps < 0.0001 & 0.06). Age-related declines in UPSIT scores were generally present (P < 0.0001). No association between the olfactory measure and smoking dose, as indexed by pack years, was evident. PD patients who currently smoke do not exhibit the smoking-related decline in olfaction observed in non-PD control subjects who currently smoke. The physiologic basis of this phenomenon is yet to be defined.
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