Browsing by Author "Bradshaw, Laura"

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    A Health Technician-delivered Brief Intervention linked to AUDIT for reduction of alcohol use in Chilean primary care: a randomized controlled trial
    (2021) Barticevic Lantadilla, Nicolás A.; Poblete A., Fernando; Zuzulich Pavez, María Soledad; Rodríguez Lobo, María Victoria; Quevedo, Diego; Sena, Brena F.; Bradshaw, Laura
    Abstract Background Because of the shortage of health professionals in Chilean primary care, Health Technicians (HT) are providing Brief Interventions (BI) for risky alcohol consumption. We compared the efficacy of two AUDIT-linked interventions provided by HTs: an informative leaflet and a BI plus leaflet. Methods This is a parallel-group randomized controlled trial with 1:1 randomization. Participants were identified through screening with the Alcohol Use Disorders Identification Test (AUDIT) at five primary care centers between March 2016 and July 2017. People older than 18 years at intermediate-risk (AUDIT score 8 to 15, inclusive) were randomized to receive either an HT-delivered BI (n = 174) or an informative leaflet (n = 168). Only data from participants (n = 294) who completed the 6-month assessment were analyzed. The leaflet was delivered without further advice. It contains alcohol consumption limits, a change planner, and strategies to decrease drinking. The BI was a 5-min discussion on the leaflet´s content plus normative feedback, tailored information on alcohol and health, and a change plan. The change in the AUDIT risk category six months after randomization (primary outcome) was compared among groups with a Chi-squared test. Changes in the secondary outcomes, which were scores on the AUDIT and the AUDIT´s consumption items (AUDIT-C), were compared with T-tests. Mixed-effects linear models adjusted for potential confounders. Outcome adjudicators were blinded to group assignment. Results At 6-month follow-up, low-risk alcohol consumption was observed in 119 (80%) participants in the BI group, and in 103 (71%) in the leaflet group, with no difference among groups ( $$\chi 2$$ χ 2 [1, N = 294] = 2.6, p = 0.1; adjusted odds ratio 0.6; 95% confidence interval [CI] 0.34, 1.05). The mean AUDIT score decreased by 5.76 points in the BI group, and by 5.07 in the leaflet group, which represents a 0.86 AUDIT point reduction attributable to the BI (secondary outcome) (T = 2.03, p = 0.043; adjusted mean difference 0.86 CI 0.06, 1.66). Conclusions The AUDIT-linked BI delivered by HTs was not associated with a greater reduction of risky alcohol consumption than an informative leaflet. Delivering a leaflet could be more efficient than a BI when provided by HTs; however, more research on the effectiveness of the leaflet is needed. Trial registration ClinicalTrials.gov NCT02642757 (December 30, 2015) https://clinicaltrials.gov/ct2/show/NCT02642757 .
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    Brief motivational therapy versus enhanced usual care for alcohol use disorders in primary care in Chile: study protocol for an exploratory randomized trial
    (2020) Barticevic Lantadilla, Nicolás A.; Poblete A., Fernando; Zuzulich Pavez, María Soledad; Rodríguez Lobo, María Victoria; Bradshaw, Laura
    Abstract Background Harmful alcohol use is a leading cause of global disability and death. However, increased detection and brief intervention capacity of more severe alcohol use disorders has not been accompanied by increased availability of treatment services. Incorporating treatment for such disorders into primary care is of paramount importance for improving access and health outcomes. This study aims to estimate the effectiveness of a Brief Motivational Treatment (BMT) applied in primary care for treatment of these disorders. Methods A parallel-group, single-blinded, severity-stratified, randomized clinical trial will test the superiority of BMT over enhanced usual care. Eligible participants will be those seeking treatment and who fulfill DSM-V criteria for alcohol use disorder and criteria for harmful alcohol use. With an estimated a loss to follow-up of 20%, a total of 182 participants will be recruited and equally randomized to each treatment group. The intervention group will receive an adaptation of the motivational enhancement therapy, as manualized in Project MATCH. This treatment consists of four 45-min sessions provided by a general psychologist with at least 3 years of primary care experience. The primary outcome is the change from baseline in the drinks per drinking day during the last 90 days, which will be captured using the Timeline Follow Back method. Secondary outcomes will describe the changes in alcohol use pattern, motivational status, and severity of the disorder. All participants will be analyzed according to the group they were allocated, regardless of the treatment actually received. Mean differences (MD) will be computed for continuous outcomes and relative risks (RR) and RR reductions (RRR) for dichotomous results. Linear models will deliver the subgroup analyses. Missingness is assumed to be associated with the baseline alcohol use pattern and severity, so a multiple imputation method will be used to handle missing data. Discussion This trial aims to test the superiority of BMT over enhanced usual care with a reasonable superiority margin, over which the BMT could be further considered for incorporation into PC in Chile. Its pragmatic approach ultimately aims to inform policymakers about the benefit of including a brief psychosocial treatment into PC. Trial registration ClinicalTrials.gov NCT04345302 . Registered on 28 April 2020Abstract Background Harmful alcohol use is a leading cause of global disability and death. However, increased detection and brief intervention capacity of more severe alcohol use disorders has not been accompanied by increased availability of treatment services. Incorporating treatment for such disorders into primary care is of paramount importance for improving access and health outcomes. This study aims to estimate the effectiveness of a Brief Motivational Treatment (BMT) applied in primary care for treatment of these disorders. Methods A parallel-group, single-blinded, severity-stratified, randomized clinical trial will test the superiority of BMT over enhanced usual care. Eligible participants will be those seeking treatment and who fulfill DSM-V criteria for alcohol use disorder and criteria for harmful alcohol use. With an estimated a loss to follow-up of 20%, a total of 182 participants will be recruited and equally randomized to each treatment group. The intervention group will receive an adaptation of the motivational enhancement therapy, as manualized in Project MATCH. This treatment consists of four 45-min sessions provided by a general psychologist with at least 3 years of primary care experience. The primary outcome is the change from baseline in the drinks per drinking day during the last 90 days, which will be captured using the Timeline Follow Back method. Secondary outcomes will describe the changes in alcohol use pattern, motivational status, and severity of the disorder. All participants will be analyzed according to the group they were allocated, regardless of the treatment actually received. Mean differences (MD) will be computed for continuous outcomes and relative risks (RR) and RR reductions (RRR) for dichotomous results. Linear models will deliver the subgroup analyses. Missingness is assumed to be associated with the baseline alcohol use pattern and severity, so a multiple imputation method will be used to handle missing data. Discussion This trial aims to test the superiority of BMT over enhanced usual care with a reasonable superiority margin, over which the BMT could be further considered for incorporation into PC in Chile. Its pragmatic approach ultimately aims to inform policymakers about the benefit of including a brief psychosocial treatment into PC. Trial registration ClinicalTrials.gov NCT04345302 . Registered on 28 April 2020
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    Effectiveness of a health technician-delivered brief intervention for alcohol: a Bayesian reanalysis of a clinical trial
    (2022) Barticevic Lantadilla, Nicolás A.; Poblete A., Fernando; Bradshaw, Laura; Bendtsen, Marcus; Pontificia Universidad Católica de Chile. Departamento de Salud Pública. Escuela de Medicina
    Objective: To reanalyze a clinical trial on the effectiveness of a Brief Intervention (BI) delivered by non-professionals to reduce risky alcohol drinking. Our previous null-hypothesis test of the effects of the BI yielded a ‘non-significant’ p-value, yet remained uninformative. Here we use the Bayesian paradigm which allows for expressing the probability of different effect sizes to better inform public policy decisions. Results: The posterior probability of the odds of risky drinking at follow-up favored a marked effect of the BI, with 96% of the probability mass being less than OR = 1, and 84% being less than OR = 0.8. Our findings show that there is a high probability that the BI delivered by health technicians lowered risky alcohol use. The posterior distributions of the BI’s effects are presented to help contextualize the evidence for policy making in Chile.
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    Factorial Structure and Diagnostic Accuracy of a Digital Version of the Alcohol Use Disorders Identification Test (d-AUDIT) to Detect Hazardous and Problematic Drinking in Primary Care
    (2023) Barticevic Lantadilla, Nicolás A.; Poblete A., Fernando; Zuzulich Pavez, María Soledad; Rodríguez, Victoria; Pedro, Jaime San; Bradshaw, Laura; Norambuena, Pablo
    Objective: We studied the factorial structure and diagnostic performance in primary care of a digital version of the Alcohol Use Disorders Identification Test (d-AUDIT) for screening for excessive drinking. Method: In two primary care centers in Santiago, Chile, we conducted a cross-sectional study involving 330 people 18 years of age or older who had drunk alcohol six or more times in the last year. The d-AUDIT was developed from the paper version validated in Chile and was self-administered on 7-inch tablets. Trained psychologists evaluated the participants using a 1-year Timeline Followback and the alcohol use disorders section from the Structured Clinical Interview for the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition. We used confirmatory factorial analysis to examine the structure of the d-AUDIT and areas under the receiver operating characteristic curves (AUCs) to examine the diagnostic performance of the d-AUDIT. Results: A two-factor model presented good overall fit, with item loads in the 0.53–0.88 range. The correlation among factors was.74, reflecting a good discrimi-nant validity. The total score and the Fast Alcohol Screening Test (FAST) score (i.e., bingeing, role failure, blackouts, and others’ concern items) obtained the best diagnostic performance for problematic drinking, with AUCs of 0.94 (CI [0.91, 0.97]) and 0.92 (CI [0.88, 0.96]), respectively. The FAST could differentiate hazardous drinking (cut point three in men and one in women) from problematic drinking (cut point four in men and two in women). Conclusions: We replicated prior factor analysis findings of a two-factor structure for the d-AUDIT with a good discrimi-nant validity. The FAST obtained excellent diagnostic performance and retained some ability to discriminate between hazardous and problematic drinking.