Risk Factors of Acoustic Neuroma: Systematic Review and Meta-Analysis.
	    		
		   		
		   			
		   		
	    	
    	 
    	10.3349/ymj.2016.57.3.776
   		
        
        	
        	
        	
        		- Author:
	        		
		        		
		        		
			        		Mantao CHEN
			        		
			        		
			        		
			        			1
			        			
			        		
			        		
			        		
			        		
			        		;
		        		
		        		
		        		
			        		Zuoxu FAN
			        		
			        		;
		        		
		        		
		        		
			        		Xiujue ZHENG
			        		
			        		;
		        		
		        		
		        		
			        		Fei CAO
			        		
			        		;
		        		
		        		
		        		
			        		Liang WANG
			        		
			        		
		        		
		        		
		        		
		        		
		        			
			        		
			        		Author Information
			        		
		        		
		        		
			        		
			        		
			        			1. Department of Neurosurgery, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China. zd05lcyxcmt@sina.com
			        		
		        		
	        		
        		 
        	
        	
        	
        		- Publication Type:Meta-Analysis ; Original Article ; Research Support, Non-U.S. Gov't ; Review
 
        	
        	
        		- Keywords:
        			
	        			
	        				
	        				
			        		
				        		Noise;
			        		
			        		
			        		
				        		smoking;
			        		
			        		
			        		
				        		allergy;
			        		
			        		
			        		
				        		acoustic neuroma;
			        		
			        		
			        		
				        		meta-analysis
			        		
			        		
	        			
        			
        		
 
        	
            
            	- MeSH:
            	
	        			
	        				
	        				
				        		
					        		Adult;
				        		
			        		
				        		
					        		Asthma/complications;
				        		
			        		
				        		
					        		Environmental Exposure/*adverse effects;
				        		
			        		
				        		
					        		Female;
				        		
			        		
				        		
					        		Humans;
				        		
			        		
				        		
					        		Hypersensitivity;
				        		
			        		
				        		
					        		*Leisure Activities;
				        		
			        		
				        		
					        		Neuroma, Acoustic/epidemiology/*etiology;
				        		
			        		
				        		
					        		Noise/*adverse effects;
				        		
			        		
				        		
					        		Occupational Exposure/adverse effects;
				        		
			        		
				        		
					        		Risk Factors;
				        		
			        		
				        		
					        		Smoking/adverse effects
				        		
			        		
	        			
	        			
            	
            	
 
            
            
            	- From:Yonsei Medical Journal
	            		
	            		 2016;57(3):776-783
	            	
            	
 
            
            
            	- CountryRepublic of Korea
 
            
            
            	- Language:English
 
            
            
            	- 
		        	Abstract:
			       	
			       		
				        
				        	PURPOSE: Many epidemiological studies have investigated environmental risk factors for the development of acoustic neuroma. However, these results are controversial. We conducted a meta-analysis of case-control studies to identify any potential relationship between history of noise exposure, smoking, allergic diseases, and risk of acoustic neuroma. MATERIALS AND METHODS: We searched PubMed to identify relevant articles. Two researchers evaluated the eligibility and extracted the data independently. RESULTS: Eleven case-control studies were included in our meta-analysis. Acoustic neuroma was found to be associated with leisure noise exposure [odds ratio (OR)=1.33, 95% confidence interval (CI): 1.05-1.68], but not with occupational noise exposure and ever noise exposure (OR=1.20, 95% CI: 0.84-1.72 and OR=1.15, 95% CI: 0.80-1.65). The OR of acoustic neuroma for ever (versus never) smoking was 0.53 (95% CI: 0.30-0.94), while the subgroup analysis indicated ORs of 0.95 (95% CI: 0.81-1.10) and 0.49 (95% CI: 0.41-0.59) for ex-smoker and current smoker respectively. The ORs for asthma, eczema, and seasonal rhinitis were 0.98 (95% CI: 0.80-1.18), 0.91 (95% CI: 0.76-1.09), and 1.52 (95% CI: 0.90-2.54), respectively. CONCLUSION: Our meta-analysis is suggestive of an elevated risk of acoustic neuroma among individuals who were ever exposed to leisure noise, but not to occupational noise. Our study also indicated a lower acoustic neuroma risk among ever and current cigarette smokers than never smokers, while there was no significant relationship for ex-smokers. No significant associations were found between acoustic neuroma and history of any allergic diseases, such as asthma, eczema, and seasonal rhinitis.