Influences of Neck and/or Wrist Pain on Hand Grip Strength of Industrial Quality Proofing Workers
	    		
		   		
		   			
		   		
	    	
    	 
    	10.1016/j.shaw.2020.06.008
   		
        
        	
        	
        	
        		- Author:
	        		
		        		
		        		
			        		Bettina WOLLESEN
			        		
			        		
			        		
			        			1
			        			
			        		
			        		
			        		
			        		
			        		;
		        		
		        		
		        		
			        		Julia GRÄF
			        		
			        		;
		        		
		        		
		        		
			        		Nils SCHUMACHER
			        		
			        		;
		        		
		        		
		        		
			        		Gianluca MEYER
			        		
			        		;
		        		
		        		
		        		
			        		Matthias WANSTRATH
			        		
			        		;
		        		
		        		
		        		
			        		Christian FELDHAUS
			        		
			        		;
		        		
		        		
		        		
			        		Kerstin LUEDTKE
			        		
			        		;
		        		
		        		
		        		
			        		Klaus MATTES
			        		
			        		
		        		
		        		
		        		
		        		
		        			
			        		
			        		Author Information
			        		
		        		
		        		
			        		
			        		
			        			1. Department of Psychology and Ergonomics, Biological Psychology and Neuroergonomics, Technical University of Berlin, Berlin, Germany
			        		
		        		
	        		
        		 
        	
        	
        	
        		- Publication Type:Original Article
 
        	
        	
            
            
            	- From:Safety and Health at Work
	            		
	            		 2020;11(4):458-465
	            	
            	
 
            
            
            	- CountryRepublic of Korea
 
            
            
            	- Language:English
 
            
            
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		        	Abstract:
			       	
			       		
				        
				        	Background:The aim of this study was to analyze the interaction between neck and/or wrist pain and hand grip strength (HGS) and to investigate factors (age, sex, neck disorders, and carpal tunnel syndrome) influencing the HGS of industrial quality proofing workers (N = 145). 
				        	
				        
				        	Methods:Standardized questionnaires [Neck Disability Index (NDI), Boston Carpal Tunnel Questionnaire] were used to evaluate existing neck and/or wrist pain. HGS measurements were performed in different wrist positions. 
				        	
				        
				        	Results:Significant differences between participants with and without neck pain were found in different wrist positions, in neutral wrist position right [without neck pain (n = 48) 46.34 (43.39 – 49.30); with neck pain (n = 97) 38.46 (36.20 – 40.72), F(1,144) = 16.82, p < 0.001, ŋ2p = 0.11] and left [without neck pain 44.06 (41.19 – 46.94); with neck pain 37.36 (35.13 – 39.58), F(1,144) = 12.70, p < 0.001, ŋ2p = 0.08]. A significant difference between participants with and without wrist pain was found for neutral wrist position right [without wrist pain (n = 105) 42.53 (40.37 – 44.70); with wrist pain (n = 40) 37.24 (33.56 – 40.91), F(1,144)) = 6.41, p = 0.01, ŋ2p = 0.04]. Regression analysis showed significant results especially for steps two (age and weight, NDI) and three (age and weight, NDI, Boston Carpal Tunnel Questionnaire) for neutral position right (R2 = 0.355, R2 = 0.357, respectively). 
				        	
				        
				        	Conclusion:Neck pain has an impact on HGS but should be evaluated in consideration of age and sex.