Tadalafil once daily in men with erectile dysfunction: an integrated analysis of data obtained from 1913 patients from six randomized, double-blind, placebo-controlled, clinical studies
Abstract
BACKGROUND: This analysis explores tadalafil once-daily treatment for 12 wk in clinical subpopulations of men with erectile dysfunction (ED).
OBJECTIVE: Assess the efficacy and safety of once-daily tadalafil 2.5mg and 5mg in patients with different ED characteristics and comorbidities.
DESIGN, SETTING, AND PARTICIPANTS: This analysis integrated data from six randomized, double-blind, placebo-controlled studies that assigned 1913 men with ≥3-mo history of ED either to once-daily placebo (n=596), tadalafil 2.5mg (n=394), or tadalafil 5mg (n=923). Clinical factors examined included: ethnicity, age, obesity, alcohol consumption, smoking, comorbidities, concomitant medication, and ED characteristics (etiology, duration, severity).
OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS: Descriptive statistics were reported for efficacy and safety, including International Index of Erectile Function Erectile Function Domain (IIEF-EF) scores and Sexual Encounter Profile question 3 (SEP3) responses. Clinical factors were included in analysis of covariance models using last observation carried forward for SEP3 and IIEF-EF scores.
RESULTS AND LIMITATIONS: Both tadalafil doses significantly improved SEP3 responses (least-squares [LS] mean change: 17.8% and 23.6%, respectively) and IIEF-EF scores (LS mean change: 4.2; 5.4) compared with placebo (p<0.01). Treatment with 2.5mg and 5mg tadalafil resulted in IIEF-EF LS mean improvements ≥4 (minimal clinically important difference [MCID]) in patients…
How strong is the evidence?
Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 2 of 5 (High · randomized trial). Randomized trials of a reasonable size are the strongest single-study design. Reported size: 1,913 participants or records.
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