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Biomedical subjects

C C DiClemente

Publications and source records attributed to C C DiClemente.

At least 55 records · Page 3Linked to original sources

Assessing the congruence between physician behavior and expert opinion in smoking cessation counseling.

This study examines the degree of transfer of smoking cessation innovation from research to health care settings by comparing frequency-of-practice ratings by a national sample of family practice physicians (n = 903, response rate = 70%) and importance ratings by smoking cessation and prevention experts (n = 58, response rate = 84%) for 14 counseling techniques. The physician survey elicited a profile that combines traditional and behavioral techniques--discussing smoking with patients, encouraging goal setting, suggesting specific steps for quitting, and presenting pamphlets. They refer to others infrequently and rarely report planning for follow-up about smoking. The experts rated these selected techniques as moderately to highly important. They favored a behavioral approach coupled with active follow-up. The major differences between physician and expert rankings were that the experts placed higher priority on planned follow-up and a lower priority on pamphlets. The uneven quality of counseling reported by physicians suggests that weighting their responses according to expert opinion would provide a more sensitive profile. Scaled weighting produced scores that may help researchers define a composite quality-quantity measure of activity.

Adult↗

The process of smoking cessation: an analysis of precontemplation, contemplation, and preparation stages of change.

Traditionally smoking cessation studies use smoker and nonsmoker categories almost exclusively to represent individuals quitting smoking. This study tested the transtheoretical model of change that posits a series of stages through which smokers move as they successfully change the smoking habit. Subjects in precontemplation (n = 166), contemplation (n = 794), and preparation (n = 506) stages of change were compared on smoking history, 10 processes of change, pretest self-efficacy, and decisional balance, as well as 1-month and 6-month cessation activity. Results strongly support the stages of change model. All groups were similar on smoking history but differed dramatically on current cessation activity. Stage differences predicted attempts to quit smoking and cessation success at 1- and 6-month follow-up. Implications for recruitment, intervention, and research are discussed.

Adaptation, Psychological↗

Stages of change profiles in outpatient alcoholism treatment.

While few believe in the uniformity myth about alcoholics, discovering relevant dimensions that usefully divide the treatment population and guide intervention has been a difficult task. This study evaluated a stages of change assessment measure with a group of 224 adults entering outpatient alcoholism treatment. Subjects' scores on the precontemplation, contemplation, action, and maintenance stage subscales of the URICA were subjected to cluster analysis yielding five distinct and theoretically consistent profiles. Profiles were labeled as follows: 1. Precontemplation (n = 63) 2. Ambivalent (n = 30) 3. Participation (n = 51) 4. Uninvolved (n = 27), and 5. Contemplation (n = 53). These five groups of subjects demonstrated no differences on demographic characteristics but significantly differed on Alcohol Use Inventory subscales, a temptation to drink and abstinence self-efficacy measure as well as several outcome variables. Group differences support the validity of the cluster analytic profiles, confirm the interpretation of profile groups, and provide interesting contrasts consistent with the stages of change model. Classification of individuals on the stages of change offers a useful perspective for alcoholism treatment matching research.

Adolescent↗

Processes of change in heavy and light smokers.

The nicotine addiction model is frequently used to explain the fact that light smokers are more successful in quitting smoking than are heavy smokers. According to this view, heavy smokers are more addicted to nicotine and therefore experience more withdrawal symptoms, cravings, and other difficulties when attempting to quit. However, dependence models of smoking have received inconsistent research support. In the present study an alternative explanation is offered, that light smokers employ more change strategies than do heavy smokers. Light (N = 72) and heavy (N = 247) smokers were compared on 10 processes of change known to be relevant to cessation based on previous studies. The MANOVA results indicated that light smokers outperformed heavy smokers on 4 of the 10 processes, especially on behaviorally oriented processes such as reinforcement management, self-liberation, and counterconditioning. A follow-up discriminant analysis correctly classified 82% of both light and heavy smokers. Although these results do not invalidate nicotine addiction models, they are suggestive and provide additional support for the Transtheoretical Model of problem behavior change.

Adolescent↗

Self-change of psychological distress: laypersons' vs. psychologists' coping strategies.

This study investigated the change processes that laypersons (N = 270) and psychologists (N = 158) reported using to overcome psychological distress. Eighty-nine percent of the community sample and 82% of the professional sample experienced at least one episode of distress. Interpersonal relationships and willpower strategies were employed commonly in both samples; medication was used infrequently. Gender, education, and previous treatment were related to coping processes among laypersons. A comparative analysis indicated that, relative to laypersons, psychologists exhibited a larger and more varied repertoire of coping strategies.

Adaptation, Psychological↗

Predicting change in smoking status for self-changers.

Fourteen different measures were investigated as predictors of change in smoking status for self-change efforts at smoking cessation. Adult subjects (N = 866) were classified into five stages of change: precontemplation, contemplation, action, maintenance, and relapse. Subjects were assessed on 10 change processes, self-efficacy, temptations to smoke, and their decisions weighing the advantages and disadvantages of smoking; and these 14 variables were used as predictors of change in smoking status 6 months later. Six significant functions were found which predicted movement for each of the stages. These predictors are of both theoretical interest and practical significance because they may be modified in self-change efforts to overcome addictive behaviors. Overall, the change processes of self-reevaluation and the helping relationship and the self-efficacy and decisional balance variables were the most efficacious predictor variables. A general pattern emerged in which processes oriented more toward environmental events, such as dramatic relief and social liberation, tended to predict failure or no progress whereas more experientially oriented processes predicted progress.

Decision Making↗

Subject characteristics as predictors of self-change in smoking.

Subject characteristics served as predictors of smokers' success or failure in their self-change efforts at smoking cessation over a 6-month period. Seven hundred and three adult subjects represented five stages of change based on the transtheoretical model: precontemplation, contemplation, action, maintenance, and relapse. Step-wise multiple discriminant functions were used to predict movement across the stages. Health problems, problem duration, daily cigarettes, previous attempts to quit, and smoking for pleasure predicted movement through various stages of change. The stronger the smoking habit, the less apt the smoker is to quit or maintain a nonsmoking status. Smokers with higher incomes and more years of education are more likely than persons of lower socioeconomic levels to be successful in their self-change efforts. The advantages of process-oriented rather than static variables for predicting self-change are discussed.

Adult↗

Decisional balance measure for assessing and predicting smoking status.

The Decisional Balance Sheet of Incentives has been proposed by Janis and Mann (1977) as a general schema for representing both the cognitive and motivational aspects of human decision making. In this study, a brief 24-item paper and pencil measure was constructed to study the decision-making process in smoking cessation. Two scales were identified and labeled the Pros of Smoking and the Cons of Smoking. These scales were successful in differentiating between five groups representing stages of change in the quitting process. The two scales were also successful when employed as predictors of smoking status at a 6-month follow-up. The Decisional Balance Scale appears to be a powerful construct of potentially wide application in behavior change.

Attitude to Health↗

Factor structure of the levels of attribution and change (LAC) scale in samples of psychotherapists and smokers.

Investigated the factor structure of the Levels of Attribution and Change (LAC) Scale, a 60-item, Likert-format instrument designed to assess the levels and loci of causal attributions about a problem behavior. Principal component analyses were performed on two samples, 194 adult smokers and 140 professional psychotherapists. In both cases, nine distinct and interpretable components were retained, which accounted for 63% and 68% of the total variance, respectively. Coefficients of congruence indicated that the two component patterns were quite similar. Item cross-classification revealed that the nine components closely resemble the 10 theoretical scales, with 2 scales (Familial Conflicts, Interpersonal Conflicts) represented by one component. Estimates of internal consistency averaged .84 and .87 for the two samples. The LAC theoretical scales and the scoring system have considerable empirical justification. The LAC Scale appears to be an internally consistent, multidimensional inventory with a robust factor structure.

Adult↗

Self-change and therapy change of smoking behavior: a comparison of processes of change in cessation and maintenance.

Cigarette smokers who quit on their own (n = 29) were compared with subjects from two commercial therapy programs: Aversion Group (n = 18) and Behavior Management Group (n = 16). Subjects were administered a Change-Process Questionnaire and a demographic and smoking-history questionnaire within seven weeks of successful cessation, then interviewed again in five months. Using a transtheoretical model of change developed by Prochaska (1979) six verbal and four behavioral processes of change and three stages of change (Decision to Change; Active Change; Maintenance) were analyzed. Subjects in each treatment group were middle class, heavy-smoking adults. The change-process analysis of cessation discriminated between the self-quitters and therapy quitters and between the two groups of therapy subjects on five variables. Stages of change interacted with the processes of change in the cessation of smoking behavior. Verbal processes were seen as important in making the decision to change while action processes were critical for breaking the actual smoking habit. Maintenance of cessation was related to, but not dependent on, how subjects actively changed smoking behavior.

Adult↗

Ondansetron for reduction of drinking among biologically predisposed alcoholic patients: A randomized controlled trial.

CONTEXT: Early-onset alcoholism differs from late-onset alcoholism by its association with greater serotonergic abnormality and antisocial behaviors. Thus, individuals with early-onset alcoholism may be responsive to treatment with a selective serotonergic agent. OBJECTIVE: To test the hypothesis that drinking outcomes associated with early vs late-onset alcoholism are differentially improved by the selective 5-HT(3) (serotonin) antagonist ondansetron. DESIGN: Double-blind, randomized, placebo-controlled clinical trial. SETTINGS: University of Texas Health Science Center in Houston (April 1995-June 1998) and University of Texas Health Science Center in San Antonio (July 1998-December 1999). PARTICIPANTS: A total of 321 patients with diagnosed alcoholism (mean age, 40.6 years; 70.5% male; 78.6% white) were enrolled, 271 of whom proceeded to randomization. INTERVENTIONS: After 1 lead-in week of single-blind placebo, patients were randomly assigned to receive 11 weeks of treatment with ondansetron, 1 microg/kg (n = 67), 4 microg/kg (n = 77), or 16 microg/kg (n = 71) twice per day; or identical placebo (n = 56). All patients also participated in weekly standardized group cognitive behavioral therapy. MAIN OUTCOME MEASURES: Self-reported alcohol consumption (drinks per day, drinks per drinking day, percentage of days abstinent, and total days abstinent per study week); and plasma carbohydrate deficient transferrin (CDT) level, an objective and sensitive marker of transient alcohol consumption. RESULTS: Patients with early-onset alcoholism who received ondansetron (1, 4, and 16 microg/kg twice per day) compared with those who were administered placebo, had fewer drinks per day (1.89, 1.56, and 1.87 vs 3.30; P =.03, P =.01, and P =.02, respectively) and drinks per drinking day (4.75, 4.28, and 5.18 vs 6.90; P =.03, P =.004, and P =.03, respectively). Ondansetron, 4 microg/kg twice per day, was superior to placebo in increasing percentage of days abstinent (70.10 vs 50.20; P =.02) and total days abstinent per study week (6.74 vs 5.92; P =.03). Among patients with early-onset alcoholism, there was a significant difference in the mean log CDT ratio between those who received ondansetron (1 and 4 microg/kg twice per day) compared with those who received the placebo (-0.17 and -0.19 vs 0.12; P =.03 and P =.01, respectively). CONCLUSION: Our results suggest that ondansetron (particularly the 4 microg/kg twice per day dosage) is an effective treatment for patients with early-onset alcoholism, presumably by ameliorating an underlying serotonergic abnormality. JAMA. 2000;284:963-971

Adult↗

Cigarette smoking in a multiethnic population of youth: methods and baseline findings.

BACKGROUND: To expand upon recent research studies that have identified dramatic ethnic differences in adolescent cigarette smoking, this study was designed to characterize smoking among a multiethnic population of adolescents and to identify significant factors that may protect against smoking initiation. METHODS: During the first 2 years, this mixed cross-sectional, longitudinal study recruited and collected baseline data from a volunteer sample of 1,441 Houston-area public school students in the 5th, 8th, or 12th grade. A wide range of new and established predictors of smoking behavior was assessed, and their associations with ever smoking and susceptibility to smoking were assessed within ethnicity (white, N = 537; African-American, N = 454; and Hispanic, N = 297). RESULTS: Consistent with previous studies, white students smoked in substantially higher proportions than African-American students, with Hispanic adolescents in-between. Simultaneously adjusting for other variables, the odds of ever smoking (OR = 0.47, P < 0.01) and susceptibility to smoking (OR = 0.64, P < 0.01) were significantly lower among African-American adolescents when compared with whites; odds ratios for Hispanics and whites did not differ. Across all three ethnicities, the most important predictor of both ever smoking and susceptibility to smoking was the smoking status of the three best friends. Several ethnicity-specific variables also were identified. CONCLUSIONS: In concordance with previous investigations, cigarette smoking prevalence differs by ethnicity, and the factors associated with ever smoking and susceptibility to smoking differ among white, African-American, and Hispanic adolescents. The results of this study may be used to develop theory-based, culturally appropriate smoking intervention programs for adolescents.

Adolescent↗

An expert system intervention for smoking cessation.

Intervention efficacy can be increased when the treatment is maximally matched to the needs of the client. One means of achieving such matching is through use of an expert system, a computer-based decision-making system designed to utilize client information to produce unique, matched information and interventions. An expert system can combine the individual matching possible in a clinic-based intervention and the low cost associated with a public health approach. This paper begins by discussing several alternative implementations of the expert system approach within the general context of communication theory. Second, the theoretical model and related empirical evidence which form the basis of the expert system is described briefly. Third, the details of a computer-driven, expert system intervention specifically developed for smoking cessation is described. Finally, empirical results from a study comparing the expert system intervention to three alternative interventions for smoking cessation are presented. In general, the expert system approach can provide a cost effective, viable, and efficacious means of intervening in a specific problem behavior area. Implications and potential areas of development are discussed.

Adult↗

An empirical typology of subjects within stage of change.

The transtheoretical model of behavior change postulates five distinct, well-defined stages of change: Precontemplation, Contemplation, Preparation, Action, and Maintenance. Each stage has been regarded as reflecting a motivational posture and treated as if it is homogenous with respect to membership. This paper reports the results of four cluster analytic studies, one within each of the first four stages of change. The cluster analysis was based on three constructs of the model. Four distinct subtypes were found within Contemplation, Preparation, and Action, and three subtypes were found within Precontemplation. External validation for the clusters was provided using the 10 Processes of Change and 8 behavioral measures as dependent measures. At least one subtype corresponded to the existing stage definition but the other subtypes suggested alternative intervention strategies.

Adult↗

Pregnancy smoking cessation: a case of mistaken identity.

This study examined the process of change in pregnancy smoking cessation, using the stages and processes of change from the Transtheoretical Model, to compare women who stopped smoking during pregnancy with women who were in the process of smoking cessation, but were not pregnant. Differences in smoking cessation process activity and abstinence self-efficacy were hypothesized between the pregnant and nonpregnant groups of women. Study participants were 89 pregnant women who quit smoking, 28 nonpregnant women in the action stage of smoking cessation, and 92 nonpregnant women in the preparation stage. The Smoking Cessation Processes of Change Scale and the Smoking Abstinence Self-Efficacy Scale served as dependent measures. One-way MANOVA and follow-up Newman-Keuls comparisons indicated significant differences between pregnant and nonpregnant women in their levels of process activity and self-efficacy. Pregnancy smoking cessation differed dramatically from the process of nonpregnancy smoking cessation. Pregnant quitters were not engaging in experiential and behavioral processes at levels associated with the action stage of change. Low levels of process use and high efficacy indicated an externally (for the baby) motivated stopping rather than an internal, intentional process of change, which may account for high relapse rates postpartum.

Adolescent↗