title: The influence of age on treatment outcomes in men with erectile dysfunction treated with two regimens of tadalafil: results of the SURE study.
abstract: OBJECTIVE
  To evaluate whether patterns of sexual activity and efficacy over time to two dosing regimens of tadalafil differ with ageing in men with erectile dysfunction (ED).
  
  
  METHODS
  The SURE study was a multicentre, crossover, open-label study. In all, 4262 men with ED were randomly assigned to treatment with tadalafil 20 mg on-demand before sexual activity, or three times per week for 5-6 weeks. After a 1-week washout period, patients were crossed over to the alternative regimen for 5-6 weeks. This post hoc analysis evaluated the pattern of sexual attempts, efficacy and safety of these two regimens of tadalafil across several age groups.
  
  
  RESULTS
  The mean number of sexual attempts per week decreased from a range of 2.6-2.8 at age < or = 40 years to 1.9 at age >70 years. Age did not significantly influence the time of sexual activity after dosing. A high percentage of attempts occurred >4 h after dosing for all age groups ( approximately 70% for men taking tadalafil three times per week and approximately 50% for men taking tadalafil on-demand). For all age groups, most attempts took place in the late evening. The mean per-patient rate of successful attempts was similar for each interval up to 36 h after dosing and decreased with increasing age (> or =75% at age < or = 60 years, > or = 68% at age >60 to < or = 70 years, and > or = 60% at age >70 years). Tadalafil was well tolerated at all ages.
  
  
  CONCLUSIONS
  Patterns of sexual activity with tadalafil 20 mg, taken on-demand or three times per week, were similar in the different age groups. Tadalafil was effective up to 36 h after dosing for all age groups.
authors.affiliation: Gregorio Marañón Hospital, Madrid, Spain. dr.wespes@skynet.be
authors.forename: Eric
authors.initials: E
authors.lastname: Wespes
authors.forename: Ignacio
authors.initials: I
authors.lastname: Moncada
authors.forename: Henry
authors.initials: H
authors.lastname: Schmitt
authors.forename: Andreas
authors.initials: A
authors.lastname: Jungwirth
authors.forename: Melanie
authors.initials: M
authors.lastname: Chan
authors.forename: Lucio
authors.initials: L
authors.lastname: Varanese
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002243:Carbolines / Q000008:administration & dosage* / Q000009:adverse effects; D018592:Cross-Over Studies; D007172:Erectile Dysfunction / Q000188:drug therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D010726:Phosphodiesterase Inhibitors / Q000008:administration & dosage* / Q000009:adverse effects; D012725:Sexual Behavior / Q000187:drug effects*; D011795:Surveys and Questionnaires; D000068581:Tadalafil; D016896:Treatment Outcome
chemical_list: D002243:Carbolines; D010726:Phosphodiesterase Inhibitors; D000068581:Tadalafil