Effectiveness of the Brief Guided Self-Change Therapy Combined with Varenicline under "Real-Life" Conditions and Mediators for Smoking Cessation.

Background: Brief therapies have proven to reduce tobacco cost-effectively, however, unsuccessful quit attempts remain notable in real-life conditions, and the underlying mechanisms of treatment success are still unclear. Objectives: We aimed to analyze the effectiveness of the Guided Self-Change (GSC) therapy combined with varenicline (VAR+T) in public health services against varenicline alone (VAR), and to identify mediators of treatment outcomes. We conducted a two-arm quasi-experimental study with 126 treatment-seeking smokers (age=57.3±9.1 years; 59.5% women). Before treatment, and at weeks 12 and 24, we assessed tobacco use and five potential mediators: withdrawal, craving, motivation to quit, anxiety, and depression. Results: Only 25% of participants adhered to varenicline prescription, and 54% to GSC therapy. VAR+T group showed a greater proportion of abstainers compared to VAR group at week 12 (75% vs 57.4%; φc=0.21) and week 24 (62.9% vs 52.5%; φc=0.10). When controlling for weeks taking varenicline, motivation showed a significant indirect effect over abstinence rates in VAR+T compared with VAR (a1b1=1.34; 95%CI=0.04, 5.03). Conclusions: The GSC effectiveness seems to increase motivation which in turn contributes to reducing tobacco use. The implementation of GSC therapy in public health services could minimize treatment duration and increase smoking abstinence in 'real-life' conditions where varenicline adherence remains low.

Psychometric Validity of the Minnesota Tobacco Withdrawal Scale in Smokers Attempting to Quit: Longitudinal Invariance across Smokers and Abstainers.

Tobacco withdrawal symptoms vary during smoking cessation increasing relapse risk; therefore, a longitudinal invariant measure seems necessary to validly assess withdrawal changes. This study aimed to examine the psychometric properties of the 7-item Minnesota Tobacco Withdrawal Scale (MTWS) during cessation, and to analyze longitudinal invariance across smokers and abstainers. We conducted a longitudinal study with 309 Spanish smokers (56.2 ± 9.9 years; 52.4% women). We assessed withdrawal at three occasions: pre-treatment (T1), week-12 (T2), and week-24 (T3). Reliability, validity, and invariance analyses were performed. MTWS reliability remained adequate over time (ωT1 = 0.78; ωT2 = 0.68; ωT3 = 0.80) in both smokers and abstainers, with satisfactory temporal stability (ICC = 0.73). MTWS correlations with anxiety, depression, and nicotine dependence (rs > 0.3) supported convergent and concurrent validity. MTWS showed no correlation with craving at T2 (rs < 0.24), suggesting discriminant validity. Unifactorial structure proved partial scalar invariance across time (χ2 = 246.009; CFI = 0.91; IFI = 0.91; SRMR = 0.09), yet longitudinal invariance between abstainers and smokers was not supported. Across groups, partial scalar invariance was only achieved at T2. Noninvariance at T3 was mainly due to item irritability (dMACS = 0.93). The MTWS is reliable and valid measure to assess withdrawal changes during cessation. Long-term MTWS comparisons between smokers and abstainers should be taken with caution since different withdrawal patterns may exist.

Relación entre la autoeficacia para dejar de fumar, la voluntad propia y quién envía a los pacientes / Relationship between self-efficacy to quit smoking, own will and who referred patients

Objetivo: Comprobar si el grado de autoeficacia (AE) para dejar de fumar es diferente según quién remita al fumador a la consulta de tabaquismo y evaluar si el grado de AE medida según procedencia tiene impacto en el resultado (éxito o fracaso). Método: Estudio observacional, longitudinal (cohorte prospectiva), multicéntrico, en consultas para dejar de fumar de España y Argentina. Para valorar la motivación, fueron utilizados test cuantitativos (Richmond, Henry Mondor de Paris y Khimji Watts) y una escala semicuantitativa. La AE se midió con una pregunta de dos cuestionarios distintos (pregunta 4 del cuestionario de Richmond y pregunta 3 del cuestionario de Khimji-Watts). El análisis estadístico incluyó modelos descriptivos, de asociación y de regresión. Resultados: Muestra de 182 sujetos (90 [49,5%] mujeres, edad media 51,4 años [DE: 11; IC 26-77]). Con la pregunta 3 de AE del test Khimji-Watts se encontró asociación con la procedencia en los varones: acudir por voluntad propia incrementa la AE frente a los que acuden enviados desde atención primaria o desde otras especialidades. Ninguna de las variables de AE presentó asociación con el resultado en dejar de fumar, pero las mujeres que acudieron por voluntad propia o enviadas desde atención primaria tienen más probabilidades de dejar de fumar. Los varones procedentes de otras especialidades y con edades medias tienen más probabilidades de fracaso. Conclusiones: Los varones que acuden a dejar de fumar por voluntad propia presentan puntuaciones más altas de AE que aquellos que acuden enviados por atención primaria y otras especialidades. No hemos encontrado una mayor abstinencia final según la puntuación de AE y la procedencia.(AU)

Objective: To check whether the degree of self-efficacy to quit smoking is different depending on who refers the smoker to the smoking cessation clinics, considering as origin: primary care, from another medical specialist or by the patient’s own volition, and to assess whether the degree of self-efficacy measured by who refers the patient has an impact on the ­outcome (success or failure). Methods: Observational, longitudinal (prospective cohort), multicentre study in smoking cessation clinics in Spain and Argentina (daily clinical practice). Quantitative tests (Richmond, Henry Mondor de Paris and Khimji Watts) and one semiquantitative test were used to assess motivation. Self-efficacy was measured with one question from two different questionnaires (question 4 of the Richmond questionnaire and question 3 of the Khimji-Watts questionnaire). Statistical analysis included descriptive, association, and regression models. Results: 182 subjects [90 (49.5%) women, mean age 51.4 years (11; 25-77)]. With question three of the auto-efficacy of the Khimji-Watts test an association was found with the origin in men: attending of their own free will increases self-efficacy compared to those who attend sent from primary care or from other specialties. None of the self-efficacy variables was associated with the outcome of quitting smoking, but women who attended of their own free will or referred from primary care are more likely to quit smoking. Men from other specialties and with middle ages are more likely to fail. Conclusions: Men referred for QS by his OV have higher SE scores (KWT3 question) than those referred by PC and OS. We did not find a higher final abstinence according to SE score and source.(AU)

Is the motivation to quit smoking a predictor of abstinence maintenance?

INTRODUCTION: The aim of this study was to explore the utility of measuring motivation to quit smoking as a predictor of abstinence maintenance among smokers who wanted to quit and who were included in a multicenter study conducted in daily clinical practice. METHODS: This observational, longitudinal (prospective cohort), multicenter study was conducted in smoking clinics in Spain and the Argentine Republic in daily clinical practice. Motivation was assessed using three quantitative motivation tests and a Visual Analogue Scale. Statistical analysis included descriptive, association measures and logistic regression models. RESULTS: Of a total of 404 subjects, 273 were ultimately included for analysis (147 women; 53.8%), mean age 51±11 years). In one year, 53.5% (36.13% by intention to treat) of subjects (146) were successful in quitting smoking [men: 45.2% (66) and women: 54.8% (80)], with no differences between sexes. None of the scales utilized was associated, in an unquestionable or direct way, with long-term abstinence, although three of them, in a very complex model, with additional variables and added interactions, were associated with the 'result' variable, when other variables intervened in certain circumstances. CONCLUSIONS: None of the analyzed motivational scales alone demonstrated an association with success or failure in quitting smoking; thus, their use in isolation is of no value. Some of the scales analyzed might be related to the maintenance of abstinence but in complex models where other variables intervene, which makes interpretation considerably difficult. Therefore, the predictive capacity of the tests analyzed, based on the models, was low.

Fagerström Test and Heaviness Smoking Index. Are they Interchangeable as a Dependence Test for Nicotine?

Objective: The purpose of this study was to evaluate the degree of agreement between the Fagerström Test for Cigarette Dependence (FTCD) and the Heaviness of Smoking Index (HSI) in daily smokers admitted to smoking cessation clinics from National Healthcare System in Spain and Argentine Republic. Material and methods: An observational, longitudinal, multicenter study (prospective cohort) conducted in smoking clinics in daily clinical practice. The patients were consecutively included as they attended the consultations. The statistical analysis was descriptive, and correlation and concordance tests as well as analysis and regression models were used. Results: In total, 308 subjects were included [161 women (52.3%)], with a mean age of 51.4 (10.8) years. We found an absence of agreement and the existence of a proportional difference between both tests [Regression coefficient for global series: 0.55 (0.52-0.59) p < .001]. This difference increased as the value of the FTCD score increased; that is, the higher the value of the FTCD score was, the greater the difference in relation to the value of the HSI score. Likewise, Cohen's kappa concordance coefficient, according to various combinations of categorization of both tests, showed that the agreement between these variables was only good. Approximately 20% of the subjects were not classified with the same degree of dependence by the two tests. Thus, a classification mismatch existed. Conclusions: We found an absence of agreement between both tests. These data imply that we should not substitute one test for the other when we analyze nicotine dependence in a population of smokers.

¿En qué momento deberíamos medir la autoeficacia para ayudar a dejar de fumar? / When Should We Measure Self-Efficacy as an Aid to Smoking Cessation?

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¿Existe asociación entre el grado de dependencia por la nicotina y la motivación para dejar de fumar? / Is There an Association Between the Degree of Nicotine Dependence and the Motivation to Stop Smoking?

Objetivo: Evaluar la existencia de asociación entre el grado de dependencia por la nicotina medido por el test de Fagerström (FTCD) y diferentes test de motivación para dejar de fumar. Material y métodos: Estudio observacional y multicéntrico realizado en consultas de tabaquismo en la práctica clínica diaria. Se recogieron variables demográficas, de estatus de fumador y las puntuaciones del FTCD y los test de motivación: test de Richmond (TR), test motivacional Henri Mondor de París (HMP), test Khimji-Watts (KW) y la escala analógica visual de motivación para dejar de fumar. El análisis estadístico fue descriptivo y se utilizaron test de correlación y análisis y modelos de regresión. Resultados: Fueron incluidos 314 sujetos (162 mujeres [51,59%]). Los varones fumaron en promedio 3,3cig/día más que las mujeres (IC95%: 0,9-5,6cig/día, p = 0,006) y tuvieron un consumo acumulado superior a las mujeres en 7,8 años-paquete (IC95%: 2,1 a 13,5 años-paquete). No se encontró asociación entre el FTCD y los test de motivación para dejar de fumar empleados en este estudio. Conclusiones: No hemos encontrado asociación entre el grado de dependencia y la motivación para dejar de fumar medidos por los instrumentos mencionados

Objective: To evaluate the association between degrees of nicotine dependence measured by the Fagerström test (FTCD) and different tests of motivation to stop smoking. Material and methods: Observational study, multicenter conducted in smoking clinics in daily clinical practice. Demographics, smoking status, FTCD scores, and motivation test results were collected: Richmond test (TR), Henri Mondor Paris motivation test (HMP), Khimji-Watts test (KW), and the visual analog scale of motivation to stop smoking. The statistical analysis was descriptive, and correlation and analysis tests and regression models were used. Results: A total of 314 subjects were included [162 women (51.59%)]. Males smoked an average of 3.3 cigarettes/day more than women (95% CI: 0.9-5.6 cigarettes/day, p = 0.006) and their cumulative consumption was 7.8 pack-years higher than in women (95% CI: 2.1 to 13.5 pack-years). We found no association between FTCD and the motivation tests to stop smoking used in this study. Conclusions: We found no association between the degree of dependence and the motivation to quit smoking measured by the aforementioned instruments

Is There an Association Between the Degree of Nicotine Dependence and the Motivation to Stop Smoking? / ¿Existe asociación entre el grado de dependencia por la nicotina y la motivación para dejar de fumar?

OBJECTIVE: To evaluate the association between degrees of nicotine dependence measured by the Fagerström test (FTCD) and different tests of motivation to stop smoking. MATERIAL AND METHODS: Observational study, multicenter conducted in smoking clinics in daily clinical practice. Demographics, smoking status, FTCD scores, and motivation test results were collected: Richmond test (TR), Henri Mondor Paris motivation test (HMP), Khimji-Watts test (KW), and the visual analog scale of motivation to stop smoking. The statistical analysis was descriptive, and correlation and analysis tests and regression models were used. RESULTS: A total of 314 subjects were included [162 women (51.59%)]. Males smoked an average of 3.3 cigarettes/day more than women (95% CI: 0.9-5.6 cigarettes/day, p=0.006) and their cumulative consumption was 7.8 pack-years higher than in women (95% CI: 2.1 to 13.5 pack-years). We found no association between FTCD and the motivation tests to stop smoking used in this study. CONCLUSIONS: We found no association between the degree of dependence and the motivation to quit smoking measured by the aforementioned instruments.

[Are blood gas tests valid in smokers?]. / Es válida la pulsioximetría en fumadores?

The authors analyze the influence of smoking on the validity of measurements of arterial saturation using percutaneous oxygen-hemoglobin blood gas tests. The authors conclude that these methods can yield elevated oxygen saturation values in smokers.

¿Es válida la pulsioximetría en fumadores? / Are blood gas tests valid in smokers?

Se analiza la influencia del hábito tabáquico en la validez de las medidas de la saturación arterial de oxihemoglobina mediante pulsioximetría percutánea. Se concluye que puede ofrecer valores falsamente elevados de SatO2 en fumadores(AU)

The authors analyze the influence of smoking on the validity of measurements of arterial saturation using percutaneous oxygen-hemoglobin blood gas tests. The authors conclude that these methods can yield elevated oxygen saturation values in smokers(AU)