Pelvic inflammatory disease and contraceptive practice. 
Analyses of data from the Women's Health Study suggest that the relative risks of hospitalization for PID were lower for women with tubal sterilizations and women whose partners had been sterilized (p less than 0.05), compared to sexually active non-contraceptors or women using oral or barrier methods.  Further studies should be conducted to evaluate this non-contraceptive benefit of sterilization.