RESULTS	Eleven ( 34 % ) of 32 patients in the supraclavicular group versus 1 ( 3 % ) of 32 in the infraclavicular group had complete hemidiaphragmatic paralysis ( P = 0.001 [ 1-tailed ] ; relative risk , 11.0 [ 95 % confidence interval , 1.5-80 .3 ] ) ; 44 % versus 13 % had any ( complete or partial ) paralysis ( P = 0.006 ; relative risk , 3.5 [ 95 % confidence interval , 1.3-9 .5 ] ) .\