tokens: However , DCF continued to be effective in reducing pelvic pain for two hours , whereas GTN scores remained more or less stable after 30 min and significantly higher than those for DFC ( after one hour : GTN , - 12 . 8 + / - 17 . 9 ; DFC , - 18 . 9 + / - 16 . 6 and after two hours : GTN , - 23 . 7 + / - 20 . 5 ; DFC , - 59 . 7 + / - 17 . 9 , p = 0 . 0001 ) .