within prospectively defined risk groups statistically significant differences were found for men ( 15.4 % pga , 6.4 % polyester ) and in the presence of at least one of the risk factors obesity , bronchitis , recurrent hernia , size of hernial sac greater than 8 cm , the last of which being the strongest unfavourable variable for pga .
C0032474
polyester
C0032502
pga