Evaluation of Drinking Risk Levels as Outcomes in Alcohol Pharmacotherapy Trials A Secondary Analysis of 3 Randomized Clinical Trials
Evaluation of Drinking Risk Levels as Outcomes in Alcohol Pharmacotherapy Trials A Secondary Analysis of 3 Randomized Clinical Trials
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DOI:
10.1001/jamapsychiatry.2018.3079
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发表时间:
2019-04-01
期刊:
影响因子:
25.8
通讯作者:
Ramey, Tanya
中科院分区:
文献类型:
--
作者:
Falk, Daniel E.;O'Malley, Stephanie S.;Ramey, Tanya
IMPORTANCE The US Food and Drug Administration recognizes total abstinence and no heavy drinking days as outcomes for pivotal pharmacotherapy trials for alcohol use disorder (AUD). Many patients have difficulty achieving these outcomes, which can discourage seeking treatment and has slowed the development of medications that affect alcohol use.OBJECTIVE To compare 2 drinking-reduction outcomes with total abstinence and no heavy drinking outcomes.DESIGN, SETTING, AND PARTICIPANTS Datawere obtained from 3 multisite, randomized, placebo-controlled clinical trials of medications for treating alcohol dependence (naltrexone, varenicline, and topiramate) in adults with DSM-IV-categorized alcohol dependence.MAIN OUTCOMES AND MEASURES Within each trial, the percentage of participants in active and placebo conditions who met responder definitions of abstinence, no heavy drinking days, a WHO 1-level reduction, and a WHO 2-level reduction was computed by month with corresponding effect sizes (Cohen h).RESULTS Across the 3 trials (N = 1169; mean [SD] age, 45 [10] years; 824 [70.5%] men), the percentage of participants classified as responders during the last 4weeks of treatmentwas lowest for abstinence (naltrexone, 34.7%[100 of 288]; varenicline, 7.3%[7 of 96]; topiramate, 11.7%[21 of 179]) followed by no heavy drinking days (naltrexone, 51.0%[147 of 288]; varenicline, 24.0%[23 of 96]; topiramate, 20.7%[37 of 179]), WHO 2-level reduction (naltrexone, 75.0%[216 of 288]; varenicline, 55.2%[53 of 96]; topiramate, 44.7%[80 of 179]), and WHO 1-level reduction (naltrexone, 83.3%[240 of 288]; varenicline, 69.8 [67 of 96]; topiramate, 54.7%[98 of 179]) outcomes. Standardized treatment effects observed for the WHO2-level reduction outcomes (naltrexone, Cohen h = 0.214 [95% CI, 0.053 -0.375]; varenicline, 0.273 [95% CI, -0.006 to 0.553]; topiramate, 0.230 [95% CI, 0.024-0.435]) and WHO1-level reduction (naltrexone, Cohen h = 0.116 [95% CI, -0.046 to 0.277]; varenicline, 0.338 [95% CI, 0.058-0.617]; topiramate, 0.014 [95% CI, -0.192 to 0.219]) were comparable with those obtained using abstinence (naltrexone, Cohen h = 0.142 [95% CI, -0.020-0.303]; varenicline, 0.146 [95% CI, -0.133 to 0.426]; topiramate, 0.369 [95% CI, 0.163-0.574]) and no heavy drinking days (naltrexone, Cohen h = 0.140 [95% CI, -0.021 to 0.302]; varenicline, 0.232 [95% CI, -0.048 to 0.511]; topiramate, 0.207 [95% CI, 0.002-0.413]).CONCLUSIONS AND RELEVANCE WHOdrinking risk level reductions appear to beworthwhile indicators of treatment outcome in AUD pharmacotherapy trials. These outcomesmay align with drinking reduction goals of many patients and capture clinically meaningful improvements experienced by more patients than either abstinence or no heavy drinking days.