The median rise in PSA in the food supplement group ( FSG ) was 14.7 % ( 95 % confidence intervals ( CIs ) 3.4-36 .7 % ) , as opposed to 78.5 % in the placebo group ( PG ) ( 95 % CI 48.1-115 .5 % ) , difference 63.8 % ( P = 0.0008 ) .