At week 12/last observation carried forward , patients taking vardenafil ODT had longer duration of erections ( at any attempt or leading to successful intercourse ) vs. placebo ( least square meanstandard error 10.20.9 minutes vs. 7.91.0 minutes , and 10.40.8 vs. 8.31.0 minutes , respectively ) , and significant increases in EF-IIEF scores , the SEP-3 response , and all sexual QoL items .