The impact of continued intervention on weight: Five-year results from the weight loss maintenance trial

OBJECTIVE

In the Weight Loss Maintenance (WLM) Trial, a personal contact (PC) intervention sustained greater weight loss relative to a self-directed (SD) group over 30 months. This study investigated the effects of continued intervention over an additional 30 months and overall weight change across the entire WLM Trial.

METHODS

WLM had 3 phases. Phase 1 was a 6-month weight loss program. In Phase 2, those who lost ≥4 kg were randomized to a 30-month maintenance trial. In Phase 3, PC participants (n = 196, three sites) were re-randomized to no further intervention (PC-Control) or continued intervention (PC-Active) for 30 more months; 218 SD participants were also followed.

RESULTS

During Phase 3, weight increased 1.0 kg in PC-Active and 0.5 kg in PC-Control (mean difference 0.6 kg; 95% CI:-1.4 to 2.7; P = 0.54). Mean weight change over the entire study was -3.2 kg in those originally assigned to PC (PC-Combined) and -1.6 kg in SD (mean difference -1.6 kg; 95% CI:-3.0 to -0.1; P = 0.04).

CONCLUSIONS

After 30 months of the PC maintenance intervention, continuation for another 30 months provided no additional benefit. However, across the entire study, weight loss was slightly greater in those originally assigned to PC.

Predictors of dietary change among those who successfully lost weight in phase I of the Weight Loss Maintenance Trial

AIM

Dietary changes occurring during weight loss interventions can vary. The present study tested if pretreatment psychosocial, dietary and demographic factors were associated with changes in fat intake and fruit and vegetable intake during a weight loss intervention.

METHODS

This analysis includes participants who lost at least four kilograms during the initial six month weight loss phase (phase I) of the Weight Loss Maintenance Trial, a group format behavioural intervention emphasising a low-fat diet and increased physical activity. Multiple linear regression was used to determine associations between pretreatment psychosocial, dietary, physical activity, and demographic variables and changes from pretreatment to six months in fat intake and fruit and vegetable intake.

RESULTS

Participants (n = 1032) were 63.4% female, 62.4% non-African American, and had a mean age of 55.6 and BMI of 34.1 kg/m². Being African American (P < 0.0001) and higher baseline kilojoule intake (P < 0.01) were associated with smaller reductions in fat intake. Being African American (p < 0.001) and older age (P = 0.02) were associated with smaller increases in fruit and vegetable intake, whereas a history of 10 or more past weight loss episodes of at least 10 lb (4.5 kg; P < 0.01) was associated with greater increases.

CONCLUSIONS

Few psychosocial factors examined contributed to variability in dietary change. Even when achieving meaningful weight losses during a behavioural weight loss intervention, African Americans may make fewer beneficial changes in fat and fruit and vegetable intake than non-African Americans.

Psychosocial predictors of weight regain in the weight loss maintenance trial

This study's purpose was to identify psychosocial predictors of weight loss maintenance in a multi-site clinical trial, following a group-based weight loss program. Participants (N = 1025) were predominately women (63%) and 38% were Black (mean age = 55.6 years; SD = 8.7). At 12 months, higher SF-36 mental health composite scores were associated with less weight regain (p < .01). For Black participants, an interaction existed between race and friends' encouragement for exercise, where higher exercise encouragement was related to more weight regain (p < .05). At 30 months, friends' encouragement for healthy eating was associated with more weight regain (p < .05), whereas higher SF-36 mental health composite scores were related to less weight regain (p < .0001). Perceived stress and select health-related quality of life indices were associated with weight regain; this relationship varied across gender, race, and treatment conditions. Temporal changes in these variables should be investigated for their impact on weight maintenance.

Greater weight loss with increasing age in the weight loss maintenance trial

OBJECTIVE

To determine the effect of age on weight loss and weight loss maintenance in participants in the Weight Loss Maintenance trial (WLM).

DESIGN AND METHODS

Secondary analysis of a randomized controlled trial of overweight/obese adults with CVD risk factors was conducted. Participants were 1685 adults with baseline BMI 25-45 kg m(2) with hypertension and/or dyslipidemia. Those who lost at least 4kg in an initial 6-month behavioral weight loss intervention (N = 1,032) were randomly assigned to a 30-month maintenance phase of self-directed control (SD), monthly personal counseling (PC), or unlimited access to an internet-based intervention (IT). Age groups were defined post-hoc and weight change was compared among age groups.

RESULTS

Participants ≥60 years old initially lost more weight than younger individuals, and sustained greater weight loss in IT and PC but not in SD (P value for trend 0.024, 0.002, and 0.36, respectively).

CONCLUSIONS

In WLM, adults age ≥60 years had greater initial weight loss and greater sustained weight loss over 3 years, compared to younger adults. Older adults had greater weight loss maintenance with either personal counseling or internet-based intervention. Future research should determine optimal implementation strategies and effects of weight loss on health outcomes in older adults.

Impact of 5-year weight change on blood pressure: results from the Weight Loss Maintenance trial

In this secondary analysis of the Weight Loss Maintenance trial, the authors assessed the relationship between blood pressure (BP) change and weight change in overweight and obese adults with hypertension and/or dyslipidemia who were randomized to 1 of 3 weight loss maintenance strategies for 5 years. The participants were grouped (N=741) based on weight change from randomization to 60 months as: (1) weight loss, (2) weight stable, or (3) weight gain. A significant positive correlation between weight change and systolic BP (SBP) change at 12, 30, and 60 months and between weight change and diastolic BP (DBP) change at 30 months was observed. From randomization to 60 months, mean SBP increased to a similar degree for the weight gain group (4.2±standard error=0.6 mm Hg; P<.001) and weight stable group (4.6±1.1 mm Hg; P<.001), but SBP did not rise in the weight loss group (1.0±1.7 mm Hg, P=.53). DBP was unchanged for all groups at 60 months. Although aging may have contributed to rise in BP at 60 months, it does not appear to fully account for observed BP changes. These results suggest that continued modest weight loss may be sufficient for long-term BP lowering.

Impact of participant and interventionist race concordance on weight loss outcomes

OBJECTIVE

We have previously shown that racial composition of behavioral intervention groups does not affect achieved weight loss. However, it is unclear if the race of the interventionist affects intervention outcomes. The objective of this analysis is to estimate the impact of race concordance between participant and interventionist on weight change in the initial weight loss phase (phase I) of the Weight Loss Maintenance trial (WLM).

DESIGN AND METHODS

A total of 1,685 overweight or obese adults (BMI 25-45 kg/m(2) ) who were taking medication for hypertension and/or dyslipidemia participated in phase I of the WLM trial. All participants received a 6-month intensive behavioral intervention in groups of 15-20 facilitated by a trained interventionist. The main outcome is change in weight at 6 months.

RESULTS

Participants were on average 55 years of age, 67% female and 44% African American (AA). Three of seventeen interventionists were AA, 14 were non-AA. Seventy-three percent of participants shared race concordance with the interventionist. There was a small but statistically significant difference in weight change of participants who were the same race as the interventionist (-5.84 kg, s.e. 0.17) as compared with those who were not race concordant (-5.04 kg, s.e. 0.33), a difference of 0.8 kg, (P = 0.04). The impact of concordance on weight change differed by race (i.e., interaction of race and concordance was significant, P = 0.02).

CONCLUSIONS

In a post hoc analysis of a group-based behavioral intervention, race concordance for non-AA participants was associated with slightly greater weight loss. Race concordance was not associated with weight loss for AA participants.

Predictors of long-term weight loss in adults with modest initial weight loss, by sex and race

Effective weight management interventions could reduce race-sex disparities in cardiovascular disease (CVD), yet little is known about factors associated with successful weight loss maintenance in race-sex subgroups. In the Weight Loss Maintenance trial (WLM), overweight/obese (BMI 25-45 kg/m(2)) adults who lost ≥4 kg in a 6-month behavioral weight loss intervention (phase I) were randomized into one of three 30-month maintenance interventions (phase II). To investigate predictors in subgroups, randomized groups were combined for this analysis. Of 1,685 phase I participants, 1,032 (61%) entered phase II, including 12% black men (BM), 26% black women (BW), 25% white men (WM), and 37% white women (WW). Weight change over the 36-month study ranged from -2.3% (95% confidence interval = -3.1 to -1.5%) in BW to -4.5% (95% confidence interval = -5.7 to -4.0%) in WM, the result of differential weight loss during phase I. Within race, men lost significantly more weight than women, but within sex group, weight loss did not differ significantly between races. Although participants regained weight during phase II, regain did not differ by race-sex group, and mean weight at the end of the study was significantly lower than phase I entry weight for each subgroup. In regression models, phase I weight loss predicted overall 36-month weight loss in all race-sex groups. Healthy dietary pattern at entry, improvement in dietary pattern, or both were predictive in three of four race-sex groups. Few other variables other than initial weight loss and dietary pattern were predictive. Future research should identify additional modifiable influences on long-term maintenance after a modest weight loss.

Branched-chain amino acid levels are associated with improvement in insulin resistance with weight loss

AIMS/HYPOTHESIS

Insulin resistance (IR) improves with weight loss, but this response is heterogeneous. We hypothesised that metabolomic profiling would identify biomarkers predicting changes in IR with weight loss.

METHODS

Targeted mass spectrometry-based profiling of 60 metabolites, plus biochemical assays of NEFA, β-hydroxybutyrate, ketones, insulin and glucose were performed in baseline and 6 month plasma samples from 500 participants who had lost ≥4 kg during Phase I of the Weight Loss Maintenance (WLM) trial. Homeostatic model assessment of insulin resistance (HOMA-IR) and change in HOMA-IR with weight loss (∆HOMA-IR) were calculated. Principal components analysis (PCA) and mixed models adjusted for race, sex, baseline weight, and amount of weight loss were used; findings were validated in an independent cohort of patients (n = 22).

RESULTS

Mean weight loss was 8.67 ± 4.28 kg; mean ∆HOMA-IR was -0.80 ± 1.73, range -28.9 to 4.82). Baseline PCA-derived factor 3 (branched chain amino acids [BCAAs] and associated catabolites) correlated with baseline HOMA-IR (r = 0.50, p < 0.0001) and independently associated with ∆HOMA-IR (p < 0.0001). ∆HOMA-IR increased in a linear fashion with increasing baseline factor 3 quartiles. Amount of weight loss was only modestly correlated with ∆HOMA-IR (r = 0.24). These findings were validated in the independent cohort, with a factor composed of BCAAs and related metabolites predicting ∆HOMA-IR (p = 0.007).

CONCLUSIONS/INTERPRETATION

A cluster of metabolites comprising BCAAs and related analytes predicts improvement in HOMA-IR independent of the amount of weight lost. These results may help identify individuals most likely to benefit from moderate weight loss and elucidate novel mechanisms of IR in obesity.

Efficacy of chlorhexidine varnish for the prevention of adult caries: a randomized trial

The Prevention of Adult Caries Study, an NIDCR-funded multicenter, double-blind, randomized clinical trial, enrolled 983 adults (aged 18-80 yrs) at high risk for developing caries (20 or more intact teeth and 2 or more lesions at screening) to test the efficacy of a chlorhexidine diacetate 10% weight per volume (w/v) dental coating (CHX). We excluded participants for whom the study treatment was contraindicated or whose health might affect outcomes or ability to complete the study. Participants were randomly assigned to receive either the CHX coating (n = 490) or a placebo control (n = 493). Coatings were applied weekly for 4 weeks and a fifth time 6 months later. The primary outcome (total net D(1-2)FS increment) was the sum of weighted counts of changes in tooth surface status over 13 months. We observed no significant difference between the two treatment arms in either the intention-to-treat or per-protocol analyses. Analysis of 3 protocol-specified secondary outcomes produced similar findings. This trial failed to find that 10% (w/v) chlorhexidine diacetate coating was superior to placebo coating for the prevention of new caries (Clinicaltrials.gov registration number NCT00357877).

Design of the Prevention of Adult Caries Study (PACS): a randomized clinical trial assessing the effect of a chlorhexidine dental coating for the prevention of adult caries

BACKGROUND

Dental caries is one of the primary causes of tooth loss among adults. It is estimated to affect a majority of Americans aged 55 and older, with a disproportionately higher burden in disadvantaged populations. Although a number of treatments are currently in use for caries prevention in adults, evidence for their efficacy and effectiveness is limited.

METHODS/DESIGN

The Prevention of Adult Caries Study (PACS) is a multicenter, placebo-controlled, double-blind, randomized clinical trial of the efficacy of a chlorhexidine (10% w/v) dental coating in preventing adult caries. Participants (n = 983) were recruited from four different dental delivery systems serving four diverse communities, including one American Indian population, and were randomized to receive either chlorhexidine or a placebo treatment. The primary outcome is the net caries increment (including non-cavitated lesions) from baseline to 13 months of follow-up. A cost-effectiveness analysis also will be considered.

DISCUSSION

This new dental treatment, if efficacious and approved for use by the Food and Drug Administration (FDA), would become a new in-office, anti-microbial agent for the prevention of adult caries in the United States.

TRIAL REGISTRATION NUMBER

NCT00357877.

Associations of internet website use with weight change in a long-term weight loss maintenance program

Background

The Weight Loss Maintenance Trial (WLM) compared two long-term weight-maintenance interventions, a personal contact arm and an Internet arm, with a no-treatment control after an initial six-month Phase I weight loss program. The Internet arm focused on use of an interactive website for support of long-term weight maintenance. There is limited information about patterns of website use and specific components of an interactive website that might help promote maintenance of weight loss.

Objective

This paper presents a secondary analysis of the subset of participants in the Internet arm and focuses on website use patterns and features associated with long-term weight maintenance.

Methods

Adults at risk for cardiovascular disease (CVD) who lost at least 4 kilograms in an initial 20-week group-based, behavioral weight-loss program were trained to use an interactive website for weight loss maintenance. Of the 348 participants, 37% were male and 38% were African American. Mean weight loss was 8.6 kilograms. Participants were encouraged to log in at least weekly and enter a current weight for the 30-month study period. The website contained features that encouraged setting short-term goals, creating action plans, and reinforcing self-management habits. The website also included motivational modules, daily tips, and tailored messages. Based on log-in and weight-entry frequency, we divided participants into three website use categories: consistent, some, and minimal.

Results

Participants in the consistent user group (n = 212) were more likely to be older (P = .002), other than African American (P = .02), and more educated (P = .01). While there was no significant difference between website use categories in the amount of Phase I change in body weight (P = .45) or income (P = .78), minimal website users (n = 75) were significantly more likely to have attended fewer Phase I sessions (P = .001) and had a higher initial body mass index (BMI) (P < .001). After adjusting for baseline characteristics including initial BMI, variables most associated with less weight regain included: number of log-ins (P = .001), minutes on the website (P < .001), number of weight entries (P = .002), number of exercise entries (P < .001), and sessions with additional use of website features after weight entry (P = .002).

Conclusion

Participants defined as consistent website users of an interactive behavioral website designed to promote maintenance of weight loss were more successful at maintaining long-term weight loss.

Trial Registration

NCT00054925; http://clinicaltrials.gov/ct2/show/NCT00054925 (Archived by WebCite at http://www.webcitation.org/5rC7523ue)

Effectiveness of the 5-As tobacco cessation treatments in nine HMOs

BACKGROUND

Smoking remains the leading cause of preventable mortality in the US. The national clinical guideline recommends an intervention for tobacco use known as the 5-As (Ask, Advise, Assess, Assist, and Arrange). Little is known about the model's effectiveness outside the research setting.

OBJECTIVE

To assess the effectiveness of tobacco treatments in HMOs.

PARTICIPANTS

Smokers identified from primary care visits in nine nonprofit health plans.

DESIGN/METHODS

Smokers were surveyed at baseline and at 12-month follow-up to assess smoking status and tobacco treatments offered by clinicians and used by smokers.

RESULTS

Analyses include the 80% of respondents who reported having had a visit in the previous year with their clinician when they were smoking (n = 2,325). Smokers were more often offered Advice (77%) than the more effective Assist treatments-classes/counseling (41%) and pharmacotherapy (33%). One third of smokers reported using pharmacotherapy, but only 16% used classes or counseling. At follow-up, 8.9% were abstinent for >30 days. Smokers who reported being offered pharmacotherapy were more likely to quit than those who did not (adjusted OR = 1.73, CI = 1.22-2.45). Compared with smokers who didn't use classes/counseling or pharmacotherapy, those who did use these services were more likely to quit (adjusted OR = 1.82, CI = 1.16-2.86 and OR = 2.23, CI = 1.56-3.20, respectively).

CONCLUSIONS

Smokers were more likely to report quitting if they were offered cessation medications or if they used either medications or counseling. Results are similar to findings from clinical trials and highlight the need for clinicians and health plans to provide more than just advice to quit.

Weight loss during the intensive intervention phase of the weight-loss maintenance trial

BACKGROUND

To improve methods for long-term weight management, the Weight Loss Maintenance (WLM) trial, a four-center randomized trial, was conducted to compare alternative strategies for maintaining weight loss over a 30-month period. This paper describes methods and results for the initial 6-month weight-loss program (Phase I).

METHODS

Eligible adults were aged > or =25, overweight or obese (BMI=25-45 kg/m2), and on medications for hypertension and/or dyslipidemia. Anthropomorphic, demographic, and psychosocial measures were collected at baseline and 6 months. Participants (n=1685) attended 20 weekly group sessions to encourage calorie restriction, moderate-intensity physical activity, and the DASH (dietary approaches to stop hypertension) dietary pattern. Weight-loss predictors with missing data were replaced by multiple imputation.

RESULTS

Participants were 44% African American and 67% women; 79% were obese (BMI> or =30), 87% were taking anti-hypertensive medications, and 38% were taking antidyslipidemia medications. Participants attended an average of 72% of 20 group sessions. They self-reported 117 minutes of moderate-intensity physical activity per week, kept 3.7 daily food records per week, and consumed 2.9 servings of fruits and vegetables per day. The Phase-I follow-up rate was 92%. Mean (SD) weight change was -5.8 kg (4.4), and 69% lost at least 4 kg. All race-gender subgroups lost substantial weight: African-American men (-5.4 kg +/- 7.7); African-American women (-4.1 kg +/- 2.9); non-African-American men (-8.5 kg +/- 12.9); and non-African-American women (-5.8 kg +/- 6.1). Behavioral measures (e.g., diet records and physical activity) accounted for most of the weight-loss variation, although the association between behavioral measures and weight loss differed by race and gender groups.

CONCLUSIONS

The WLM behavioral intervention successfully achieved clinically significant short-term weight loss in a diverse population of high-risk patients.

Comparison of strategies for sustaining weight loss: the weight loss maintenance randomized controlled trial

CONTEXT

Behavioral weight loss interventions achieve short-term success, but re-gain is common.

OBJECTIVE

To compare 2 weight loss maintenance interventions with a self-directed control group.

DESIGN, SETTING, AND PARTICIPANTS

Two-phase trial in which 1032 overweight or obese adults (38% African American, 63% women) with hypertension, dyslipidemia, or both who had lost at least 4 kg during a 6-month weight loss program (phase 1) were randomized to a weight-loss maintenance intervention (phase 2). Enrollment at 4 academic centers occurred August 2003-July 2004 and randomization, February-December 2004. Data collection was completed in June 2007.

INTERVENTIONS

After the phase 1 weight-loss program, participants were randomized to one of the following groups for 30 months: monthly personal contact, unlimited access to an interactive technology-based intervention, or self-directed control. Main Outcome Changes in weight from randomization.

RESULTS

Mean entry weight was 96.7 kg. During the initial 6-month program, mean weight loss was 8.5 kg. After randomization, weight regain occurred. Participants in the personal-contact group regained less weight (4.0 kg) than those in the self-directed group (5.5 kg; mean difference at 30 months, -1.5 kg; 95% confidence interval [CI], -2.4 to -0.6 kg; P = .001). At 30 months, weight regain did not differ between the interactive technology-based (5.2 kg) and self-directed groups (5.5 kg; mean difference -0.3 kg; 95% CI, -1.2 to 0.6 kg; P = .51); however, weight regain was lower in the interactive technology-based than in the self-directed group at 18 months (mean difference, -1.1 kg; 95% CI, -1.9 to -0.4 kg; P = .003) and at 24 months (mean difference, -0.9 kg; 95% CI, -1.7 to -0.02 kg; P = .04). At 30 months, the difference between the personal-contact and interactive technology-based group was -1.2 kg (95% CI -2.1 to -0.3; P = .008). Effects did not differ significantly by sex, race, age, and body mass index subgroups. Overall, 71% of study participants remained below entry weight.

CONCLUSIONS

The majority of individuals who successfully completed an initial behavioral weight loss program maintained a weight below their initial level. Monthly brief personal contact provided modest benefit in sustaining weight loss, whereas an interactive technology-based intervention provided early but transient benefit.

TRIAL REGISTRATION

clinicaltrials.gov Identifier: NCT00054925.

Design and implementation of an interactive website to support long-term maintenance of weight loss

Background

For most individuals, long-term maintenance of weight loss requires long-term, supportive intervention. Internet-based weight loss maintenance programs offer considerable potential for meeting this need. Careful design processes are required to maximize adherence and minimize attrition.

Objective

This paper describes the development, implementation and use of a Web-based intervention program designed to help those who have recently lost weight sustain their weight loss over 1 year.

Methods

The weight loss maintenance website was developed over a 1-year period by an interdisciplinary team of public health researchers, behavior change intervention experts, applications developers, and interface designers. Key interactive features of the final site include social support, self-monitoring, written guidelines for diet and physical activity, links to appropriate websites, supportive tools for behavior change, check-in accountability, tailored reinforcement messages, and problem solving and relapse prevention training. The weight loss maintenance program included a reminder system (automated email and telephone messages) that prompted participants to return to the website if they missed their check-in date. If there was no log-in response to the email and telephone automated prompts, a staff member called the participant. We tracked the proportion of participants with at least one log-in per month, and analyzed log-ins as a result of automated prompts.

Results

The mean age of the 348 participants enrolled in an ongoing randomized trial and assigned to use the website was 56 years; 63% were female, and 38% were African American. While weight loss data will not be available until mid-2008, website use remained high during the first year with over 80% of the participants still using the website during month 12. During the first 52 weeks, participants averaged 35 weeks with at least one log-in. Email and telephone prompts appear to be very effective at helping participants sustain ongoing website use.

Conclusions

Developing interactive websites is expensive, complex, and time consuming. We found that extensive paper prototyping well in advance of programming and a versatile product manager who could work with project staff at all levels of detail were essential to keeping the development process efficient.

Trial Registration

clinicaltrials.gov NCT00054925

The effectiveness and cost effectiveness of telephone counselling and the nicotine patch in a state tobacco quitline

OBJECTIVES

State and national tobacco quitlines have expanded rapidly and offer a range of services. We examined the effectiveness and cost effectiveness of offering callers single session versus multisession counselling, with or without free nicotine patches.

METHODS

This 3x2 randomised trial included 4614 Oregon tobacco quitline callers and compared brief (one 15-minute call), moderate (one 30-minute call and a follow-up call) and intensive (five proactive calls) intervention protocols, with or without offers of free nicotine patches (nicotine replacement therapy, NRT). Blinded staff assessed tobacco use by phone at 12 months.

RESULTS

Abstinence odds ratios were significant for moderate (OR = 1.22, CI = 1.01 to 1.48) and intensive (OR = 1.29, CI = 1.07 to 1.56) intervention, and for NRT (OR = 1.58, CI = 1.35 to 1.85). Intent to treat quit rates were as follows: brief no NRT (12%); brief NRT (17%); moderate no NRT (14%); moderate NRT (20%); intensive no NRT (14%); and intensive NRT (21%). Relative to brief no NRT, the added costs for each additional quit was $2467 for brief NRT, $1912 for moderate no NRT, $2109 for moderate NRT, $2641 for intensive no NRT, and $2112 for intensive NRT.

CONCLUSION

Offering free NRT and multisession telephone support within a state tobacco quitline led to higher quit rates, and similar costs per incremental quit, than less intensive protocols.

Provider feedback to improve 5A's tobacco cessation in primary care: a cluster randomized clinical trial

The electronic health record (EHR) may be an effective tool to help clinicians address tobacco use more consistently. To evaluate the impact of EHR-generated practice feedback on rates of referral to a state-level tobacco quitline, we conducted a cluster randomized clinical trial (feedback versus no feedback) within 19 primary care clinics in Oregon. Intervention clinics received provider-specific monthly feedback reports generated from EHR data. The reports rated provider performance in asking, advising, assessing, and assisting with tobacco cessation compared with a clinic average and an achievable benchmark of care. During 12 months of follow-up, EHR-documented rates of advising, assessing, and assisting were significantly improved in the intervention clinics compared with the control clinics (p<.001). A higher case-mix index and presence of a clinic champion were associated with higher rates of referral to a state-level quitline. EHR-generated provider feedback improved documentation of assistance with tobacco cessation. Connecting physician offices to a state-level quitline was feasible and well accepted.

The feasibility of connecting physician offices to a state-level tobacco quit line

BACKGROUND

Telephone counseling for tobacco cessation is an effective and evidence-based approach to address tobacco use. The wide dissemination of region- and state-level quit lines has been a major goal for public health agencies. However, connecting patients in primary care settings to state-level quit lines has not been evaluated.

METHODS

Observational study describing two methods (fax referral and providing a brochure) to connect private physician offices with a state-level quit line in Oregon. This study describes the resources required to create a clinical pathway for the 5A's in primary care (ask, advise, assess, assist, and arrange) using a state-level telephone quit line as an intervention for cessation in primary care clinics sharing a common electronic medical record system, focusing on the costs and generalizability of this approach.

RESULTS

Of the 15,662 smokers identified in 19 primary care clinics, 745 patients were referred to the Oregon Tobacco Quit Line during the study period. The program cost in the first year was $15 to $22 per patient connected with the quit line; in subsequent years, the cost decreased to $4 to $6 per quit-line connection.

CONCLUSIONS

Connecting private physician offices to a state-level quit line is feasible, can be accomplished at low cost with minimal use of resources, and may be cost effective. Regional, state, and local tobacco quit lines should consider a physician office "quit-line connection" as a practical approach to increase utilization.

Natural language processing in the electronic medical record: assessing clinician adherence to tobacco treatment guidelines

BACKGROUND

Comprehensively assessing care quality with electronic medical records (EMRs) is not currently possible because much data reside in clinicians' free-text notes.

METHODS

We evaluated the accuracy of MediClass, an automated, rule-based classifier of the EMR that incorporates natural language processing, in assessing whether clinicians: (1) asked if the patient smoked; (2) advised them to stop; (3) assessed their readiness to quit; (4) assisted them in quitting by providing information or medications; and (5) arranged for appropriate follow-up care (i.e., the 5A's of smoking-cessation care).

DESIGN

We analyzed 125 medical records of known smokers at each of four HMOs in 2003 and 2004. One trained abstractor at each HMO manually coded all 500 records according to whether or not each of the 5A's of smoking cessation care was addressed during routine outpatient visits.

MEASUREMENTS

For each patient's record, we compared the presence or absence of each of the 5A's as assessed by each human coder and by MediClass. We measured the chance-corrected agreement between the human raters and MediClass using the kappa statistic.

RESULTS

For "ask" and "assist," agreement among human coders was indistinguishable from agreement between humans and MediClass (p>0.05). For "assess" and "advise," the human coders agreed more with each other than they did with MediClass (p<0.01); however, MediClass performance was sufficient to assess quality in these areas. The frequency of "arrange" was too low to be analyzed.

CONCLUSIONS

MediClass performance appears adequate to replace human coders of the 5A's of smoking-cessation care, allowing for automated assessment of clinician adherence to one of the most important, evidence-based guidelines in preventive health care.

Tobacco-cessation services and patient satisfaction in nine nonprofit HMOs

BACKGROUND

The U.S. Public Health Service clinical practice guideline calls for clinicians and healthcare organizations to identify and treat every tobacco user seen in a healthcare setting. There is little information on the extent of compliance with the guideline's treatment model described by the "5A's" (Ask, Advise, Assess, Assist, Arrange).

METHODS

In 1999-2000 a survey was mailed to 64,764 members aged 25 to 75 years, of nine nonprofit HMOs participating in the National Cancer Institute-funded Cancer Research Network. These plans provide medical care to more than 8 million Americans including a minority enrollment of 30%. Smokers were asked about tobacco-cessation treatments received during primary care visits in the past year.

RESULTS

A 70% response rate identified a smoking prevalence of 10% (n=4207). Results indicated that 90% of smokers were asked about smoking, 71% were advised to quit, 56% were assessed for their willingness to quit, 49% received assistance interventions, and 9% had follow-up arranged. Treatment was provided more often to smokers who asked for help and/or intended to quit. Few and only modest associations were found between other patient characteristics and receipt of 5A's cessation services. In contrast to widely reported concerns about smokers' resistance to tobacco interventions, smokers who received treatment were more satisfied with health plan services.

CONCLUSIONS

Results demonstrate substantial clinician compliance with the first two steps-Ask and Advise. Greater efforts are needed in providing the more effective tobacco treatments-Assist and Arrange. Compliance with the guideline is associated with greater patient satisfaction.

Teen reach: outcomes from a randomized, controlled trial of a tobacco reduction program for teens seen in primary medical care

OBJECTIVE

To test the long-term efficacy of brief counseling plus a computer-based tobacco intervention for teens being seen for routine medical care.

METHODS

Both smoking and nonsmoking teens, 14 to 17 years of age, who were being seen for routine visits were eligible for this 2-arm controlled trial. Staff members approached teens in waiting rooms of 7 large pediatric and family practice departments within a group-practice health maintenance organization. Of 3747 teens invited at > or =1 visits, 2526 (67%) consented and were randomized to tobacco intervention or brief dietary advice. The tobacco intervention was individually tailored on the basis of smoking status and stage of change. It included a 30-second clinician advice message, a 10-minute interactive computer program, a 5-minute motivational interview, and up to two 10-minute telephone or in-person booster sessions. The control intervention was a 5-minute motivational intervention to promote increased consumption of fruits and vegetables. Follow-up smoking status was assessed after 1 and 2 years.

RESULTS

Abstinence rates after 2 years were significantly higher for the tobacco intervention arm, relative to the control group, in the combined sample of baseline smokers and nonsmokers (odds ratio [OR]: 1.23; 95% confidence interval [CI]: 1.03-1.47). Treatment effects were particularly strong among baseline self-described smokers (OR: 2.42; 95% CI: 1.40-4.16) but were not significant for baseline nonsmokers (OR: 1.25; 95% CI: 0.97-1.61) or for those who had "experimented" in the past month at baseline (OR: 0.95; 95% CI: 0.45-1.98).

CONCLUSIONS

Brief, computer-assisted, tobacco intervention during routine medical care increased the smoking cessation rate among self-described smokers but was less effective in preventing smoking onset.

Depressed mood and smoking experimentation among preteens

The authors examined children's depressed mood, parental depressed mood, and parental smoking in relation to children's smoking susceptibility and experimentation over 20 months in a cohort of 418 preteens (ages 10-12 at baseline) and their parents. Depressed mood in preteens was strongly related to experimentation but not to susceptibility. In cross-sectional analyses parental depressed mood was related to children's experimentation, but in longitudinal analyses parental depressed mood at baseline did not differentiate children who experimented from those who did not. Although parental smoking was strongly related to experimentation, it was not related to susceptibility either cross-sectionally or longitudinally. Depressed mood among preteens and parents appeared to be more strongly related to children's smoking behaviors than to their intentions to smoke.

The problem is getting us to stop. What teens say about smoking cessation

BACKGROUND

Low participation and high dropout in many teen cessation programs may be due to lack of fit between teens' needs and the way programs are delivered. Qualitative studies, designed to identify and understand preferences of intervention participants and barriers to participation, offer opportunities to customize programs and improve their reach and effectiveness.

METHODS

Two sets of focus groups with high school students were held in the Portland, OR, metropolitan area to elicit reactions to two smoking cessation programs and discuss motivations for and experiences with quitting. Thirty-three students (15 girls, 18 boys) participated in the first set of four focus groups; 40 students (21 girls, 19 boys) in the five focus groups for the second.

RESULTS

Participants preferred programs that respect the challenges that teens face in quitting, and acknowledge their choice in making the decision to quit. Teens wanted nonjudgmental and confidential support from cessation counselors, and preferred counselors who are ex-smokers, give useful quit tips, and can provide support for quit attempts. Private, computer-based programs and personalized telephone services were options for delivering cessation information and support.

CONCLUSION

Teen smokers can supply valuable information to improve youth cessation programs to fit teen lifestyles, respect the challenges teens face, and acknowledge their choice in making the decision to quit.

Developing and testing new smoking measures for the Health Plan Employer Data and Information Set

OBJECTIVE

To develop and test items for the Health Plan Employee Data and Information Set (HEDIS) that assess delivery of the full range of provider-delivered tobacco interventions.

MATERIALS AND METHODS

The authors identified potential items via literature review; items were reviewed by national experts. Face validity of candidate items was tested in focus groups. The final survey was sent to a random sample of 1711 adult primary care patients; the re-test survey was sent to self-identified smokers.

RESULTS

The process identified reliable items to capture provider assessment of motivation and provision of assistance and follow-up.

CONCLUSIONS

One can reliably assess patient self-report of provider delivery of the full range of brief tobacco interventions. Such assessment and feedback to health plans and providers may increase use of evidence-based brief interventions.

Tobacco use patterns and attitudes among teens being seen for routine primary care

PURPOSE

To describe the tobacco-related attitudes, behaviors, and needs of smoking and nonsmoking teens being seen for routine pediatric care and to identify predictors of tobacco use.

DESIGN

Cross-sectional survey of adolescent primary care patients who completed self-administered questionnaires in medical office waiting rooms while waiting for routine care visits.

SETTING

A group-practice HMO in the Pacific Northwest.

SUBJECTS

A sample of 2526 teenagers, ages 14 to 17, who consented to receive health promotion interventions as a part of a randomized trial in seven pediatric and family practice offices.

MEASURES

A 38-item questionnaire assessed tobacco use history, attitudes, quit attempts, and stage of acquisition or cessation along with gender, age, race/ethnicity, body mass index, educational plans, frequency of exercise, attempts to lose weight, and depressed mood.

RESULTS

Sixty-seven percent of teens approached (2526 of 3747) consented to complete a questionnaire and receive tobacco- or diet-related interventions as a part of their medical visit. About 23% of teen patients reported smoking at least one cigarette in the last month, although only 14% described themselves as current "smokers." Most current smokers (84%) smoked at least 20 days in the last month. Logistic regression predictors of smoking included older age, Native American ethnicity, lower educational aspirations, lower body mass index, smoking among half or more friends, smokers at home, and a positive depression screen. Among ever-regular smokers, most were in the action (28%), preparation (21%), or contemplation (22%) readiness to quit smoking stages, and 77% of current smokers had made one or more serious quit attempts in the last year.

CONCLUSIONS

Most teens in these medical facilities consented to receive tobacco and diet interventions, and most self-described current smokers were contemplating or preparing to quit. Medical visits provide attractive opportunities for tobacco intervention, but messages should be tailored based on the patient's tobacco status and stage of acquisition or cessation.

Steps to soulful living (steps): a weight loss program for African-American women

BACKGROUND

The disproportionate disease burden experienced by African-American women can be explained partially by the higher rates of obesity in this population. African-American women who can benefit from weight loss may be less likely to attempt it and may have relatively less success in using traditional weight loss programs compared to White women. Steps to Soulful Living (Steps) was a pilot study to test the effects of a culturally adapted weight loss program on weight loss in African-American women.

METHODS

Sixty-six African-American women participated in a 6-month weight loss program that included weekly group meetings and supervised exercise sessions. Mean baseline body mass index was 39 kg/m2, and mean baseline weight was 107 kg. Cultural adaptations, defined as program adjustments, made in response to women's preferences as expressed in focus group interviews included changes in intervention format, the content of the group meetings, and the location and format of the exercise sessions.

RESULTS

Seventy-six percent of the participants attended at least 50% of the 26 weekly sessions, and 56% attended at least 75% of the sessions. Average hours of exercise per week approximately doubled during the program in comparison to baseline levels. Mean weight loss at 26 weeks was 3.7 kg, categorizing those who were lost to follow-up as having zero weight loss. Participants who attended at least 75% of the group meetings lost a mean of 6.2 kg at six months. Those who attended fewer meetings lost a mean of 0.9 kg.

CONCLUSIONS

This 6-month program was associated with relatively larger weight losses, particularly among participants with high attendance, than have usually been observed in culturally adapted programs for African-American women.

Tobacco-control policies in 11 leading managed care organizations: progress and challenges

CONTEXT

Although evidence-based national guidelines for tobacco-dependence treatment have been available since 1996, translating these guidelines into clinical practice is challenging.

PRACTICE PATTERN EXAMINED

Policies regarding tobacco-dependence treatment (e.g., written guidelines and coverage of pharmacotherapy) and implementation strategies of 11 U.S. managed care organizations known to have strong tobacco-control programs.

DATA SOURCES

Detailed telephone interviews with multiple informants at each health plan and review of written treatment guidelines and policies for tobacco dependence.

RESULTS

Although 10 of 11 plans had adopted tobacco-dependence treatment guidelines consistent with the national guideline, fewer had guidelines for special groups, such as adolescents (6 plans), parents (5 plans), pregnant women (5 plans), and hospitalized smokers (3 plans). Most plans offered clinician training and recommended office systems to support provider efforts; however, fewer actively facilitated their implementation. Most plans provided other support for tobacco treatment, including dedicated budgets, designated staff, and an oversight committee. All plans offered some coverage for tobacco-cessation pharmacotherapy and behavioral counseling, although not to the extent recommended by the national guideline.

CONCLUSION

Implementation of national tobacco-treatment guidelines is feasible in closed-panel managed care organizations. However, even these leading health plans could do more to comply with national practice guidelines on tobacco-dependence treatment and make it easier for clinicians to help patients stop smoking (e.g., through increased training and expanded coverage of tobacco-dependence treatment).

Screening and brief intervention for hazardous drinking in an HMO: effects on medical care utilization

This study examined whether a brief intervention to reduce hazardous alcohol consumption among primary care patients reduced use of medical care. In a parent, randomized controlled trial, at-risk drinkers identified in HMO outpatient waiting rooms were randomly assigned to receive usual care or brief clinician advice plus a 15-minute motivational counseling session. The current study (n = 514) examined the groups' use of outpatient and inpatient medical services during two years after intervention. Although the intervention reduced alcohol consumption at six-month follow-up, intervention and control groups made similar numbers of outpatient visits (M = 17.7 vs. 18.3, respectively; p = .47), were equally likely to be hospitalized (21.2% vs. 22.0%; p = .81), and among those hospitalized, had similar lengths of stay (4.7 vs. 6.6 days; p = .37). Although brief interventions to reduce hazardous drinking may potentially reduce medical care utilization, more evidence is needed to substantiate their practicality and cost-effectiveness.

Implementation and effectiveness of a brief smoking-cessation intervention for hospital patients

OBJECTIVES

Previous research has documented that hospital-based smoking-cessation counseling is efficacious and cost-effective when delivered by research staff. This study evaluated the implementation and effectiveness of this intervention program when delivered by respiratory therapists chosen from the regular hospital staff.

METHODS

A total of 1,173 hospitalized smokers were randomly assigned to either usual care or a stage-based bedside counseling program supplemented with a videotape, self-help materials, and a follow-up telephone call.

RESULTS

Using an intent-to-treat analysis and counting those lost to follow-up as smokers, we did not find a significant difference in outcome between intervention (14.2% reported being abstinent for > or =6 months at the 1-year follow-up) and usual care conditions (13.6% abstinence). Process analyses revealed that these results were due to a combination of failure to reach many patients and reduced effectiveness of respiratory therapist interventionists compared with experienced professional counselors in a previous study conducted in the same hospitals.

CONCLUSIONS

We recommend implementation of hospital-based smoking-cessation counseling by professional counselors whose primary responsibility is to deliver the intervention. Recommendations for future research and for innovative ways to reach hospitalized smokers who are not receiving intervention are discussed.

Stress management intervention for primary prevention of hypertension: detailed results from Phase I of Trials of Hypertension Prevention (TOHP-I)

PURPOSE

Stress Management Intervention (SMI) was one of seven nonpharmacologic approaches evaluated in Phase I Trials of Hypertension Prevention (TOHP-I) for efficacy in lowering diastolic blood pressure (BP) in healthy men and women aged 30 to 54 years with diastolic BP 80-89 mm Hg.

METHODS

A total of 242 and 320 participants were randomized to SMI or an "assessment only" SMI Control, respectively, at four clinical centers. The SMI consisted of 37 contact hours in 21 group and two individual meetings over 18 months and included: training in four relaxation methods, techniques to reduce stress reactions, cognitive approaches, communication skills, time management, and anger management within a general problem-solving format. Standardized protocols detailed methods and timing for collecting BP, psychosocial measures, and urinary samples from both SMI and SMI Control participants.

RESULTS

In intention-to-treat analyses, although significant baseline to termination BP reductions were observed in both groups, net differences between the SMI and SMI Control groups' BP changes (mean (95% CI)) were not significant: -0.82 (-1.86, 0.22) for diastolic BP, and -0.47 (-1.96, 1.01) for systolic BP. Extensive adherence sub-group analyses found one effect: a significant 1.36 mm Hg (p = 0.01) reduction in diastolic BP relative to SMI Controls at the end of the trial for SMI participants who completed 61% or more of intervention sessions.

CONCLUSIONS

While the TOHP-I SMI was acceptable to participants as evident from high levels of session completion, the absence of demonstrated BP lowering efficacy in intention-to-treat analyses suggests that the TOHP-I SMI is an unlikely candidate for primary prevention of hypertension in a general population sample similar to study participants. The isolated finding of significant diastolic BP lowering in SMI participants with higher adherence provides very weak evidence of SMI BP lowering efficacy and may be a chance finding. Whether similar or other stress management interventions can produce significant BP lowering in populations selected for higher levels of BP, stress, or intervention adherence remains to be demonstrated.

Relapse and maintenance issues for smoking cessation

This article reviews short-term (6 months) and longer term (12-24 months) maintenance of cessation and relapse in adult smokers and the factors and treatments that affect these outcomes. MedLine and PsycLIT searches were done for research published in English between 1988 and 1998 meeting a defined set of criteria. Intensive intervention, telephone counseling, and use of pharmacotherapy were found to improve outcomes; however, compared with public health approaches, they reach relatively few smokers. Brief interventions during medical visits are cost-effective and could potentially reach most smokers but are not consistently delivered. Predictors of relapse include slips, younger age, nicotine dependence, low self-efficacy, weight concerns, and previous quit attempts. Potential areas for research, recommendations for longer follow-up assessments, and standard definitions for slip, relapse, and long-term maintenance are discussed.

Adolescent health care visits: opportunities for brief prevention messages

CONTEXT

It has been suggested that clinicians should increase efforts to modify and prevent risky behavior in adolescents. Professional organizations have proposed recommendations about access to care and preventive services, but it is difficult to know where and how to most effectively deliver such services.

PRACTICE PATTERN EXAMINED

Clinic visits among adolescent HMO members (14 to 17 years of age).

SETTING

Kaiser Permanente Northwest Division, a medium-sized, nonprofit, group-model HMO in the Pacific Northwest.

DATA SOURCES

Two administrative databases (one for membership and one for outpatient utilization).

RESULTS

A total of 22,626 adolescents who met the inclusion criteria were identified. Of these, 62% (more than 14,000 adolescents) were seen in a primary care clinic within 1 year; almost 83% (more than 18,000 adolescents) were seen within 2 years. There were several opportunities for follow-up for adolescents who had at least one visit in 1995: 60% had more than one visit during 1995, and 80% had more than one visit over the 2-year span of 1995 and 1996. The largest number of adolescent visits occurred in August through November, and most visits took place in the afternoon.

CONCLUSIONS

Primary care visits in an HMO present an excellent opportunity to reach many teenagers outside of a school setting. Short-term educational or prevention programs would be optimal during late summer and fall; additional staff members may be able to present these programs after school once school begins.

Cost-effectiveness of a hospital-based smoking cessation intervention

OBJECTIVES

This study evaluated the cost-effectiveness of a smoking cessation and relapse-prevention program for hospitalized adult smokers from the perspective of an implementing hospital. It is an economic analysis of a two-group, controlled clinical trial in two acute care hospitals owned by a large group-model health maintenance organization. The intervention included a 20-minute bedside counseling session with an experienced health counselor, a 12-minute video, self-help materials, and one or two follow-up calls.

METHODS

Outcome measures were incremental cost (above usual care) per quit attributable to the intervention and incremental cost per discounted life-year saved attributable to the intervention.

RESULTS

Cost of the research intervention was $159 per smoker, and incremental cost per incremental quit was $3,697. Incremental cost per incremental discounted life-year saved ranged between $1,691 and $7,444, much less than most other routine medical procedures. Replication scenarios suggest that, with realistic implementation assumptions, total intervention costs would decline significantly and incremental cost per incremental discounted life-year saved would be reduced by more than 90%, to approximately $380.

CONCLUSIONS

Providing brief smoking cessation advice to hospitalized smokers is relatively inexpensive, cost-effective, and should become a part of the standard of inpatient care.

The medical care system and prevention: the need for a new paradigm

The American medical care system falls to provide effective prevention services even though some prevention services are among the most cost-effective medical procedures available. Many prevention services are routinely delivered in inefficient or ineffective ways, and new technologies may be widely and aggressively implemented despite serious doubts about their efficacy and cost-effectiveness. The barriers to effective prevention services result from conceptual limitations in our model of medical care systems, particularly the lack of a population-based perspective. A change in paradigm is needed before reforms in our health care system can improve health without bankrupting the nation.

Brief intervention in a primary care setting for hazardous drinkers

INTRODUCTION

The study was designed to test a brief intervention for reducing alcohol consumption among moderate to heavy (hazardous) drinkers in a busy HMO primary care setting.

METHODS

In a randomized controlled trial, hazardous drinkers (n = 516) were identified by the AUDIT screening questionnaire. Intervention included brief clinician advice (30 seconds), a 15-minute motivational session by counselors, and printed materials.

RESULTS

At six-month follow-up, intervention subjects reported fewer total standard drinks in the past three months (176 versus 216, P = .04, one-tailed) and fewer drinking days per week (2.8 versus 3.3, P = .02) than controls, but similar drinks per drinking day (3.3 versus 3.5; P = .13). At 12 months, intervention subjects again reported fewer drinking days per week (2.7 versus 3.1; P = .04) than controls, but similar numbers of standard drinks (157 versus 179; P = .13) and drinks per drinking day (3.6 versus 3.3; P = .20). Intervention subjects were somewhat more likely than controls to report drinking within daily recommended limits (< or = 3 for men, < or = 2 for women) at both six months (79% versus 71%; P = .06) and 12 months (80% versus 73%; P = .07), but did not differ significantly from controls on other drinking outcomes (percent abstinent, frequency of drinking > or = 6 drinks per drinking occasion, estimated peak blood alcohol concentration), or use of medical care in the year following intervention.

CONCLUSIONS

A one-time, brief motivational intervention using minimal clinician time supplemented by trained counselors resulted in a modest reduction in frequency of alcohol consumption in a busy primary care population. Future research should focus on strengthening and maintaining intervention effects.

Does gender affect response to a brief clinic-based smoking intervention?

INTRODUCTION

Although recent reviews suggest few gender differences in smoking-cessation outcomes, it is important to establish whether gender differences exist in response to the brief interventions increasingly recommended as part of routine medical care.

METHODS

We used data from an efficacious primary care-based smoking intervention to examine gender differences in smoking characteristics, use of intervention components, self-reported quitting activities, and cessation outcomes among all smokers randomized to receive clinician advice and nurse-assisted intervention (n = 1,978, 58% female).

RESULTS

Although female and male smokers differed on a number of sociodemographic and smoking-related characteristics, they were equally likely to participate in each step of the recommended intervention. Female and male smokers were also equally likely to report quit attempts and cessation at 3, 12, and 3 and 12 months (combined long-term cessation endpoint). Similarly, no gender difference in relapse at 12 months was seen. Women attempting to quit used a greater number and variety of smoking-cessation strategies, suggesting that, although outcomes were similar, the processes of cessation may vary by gender.

CONCLUSIONS

Since this brief intervention in primary care was equally efficacious and acceptable to female and male smokers, broader implementation in medical settings of this population-based approach to reducing tobacco use is warranted. Indeed, widespread implementation of smoking-cessation programs in medical settings may particularly benefit women, who are more likely than men to have contacts with the medical care system.

Take Heart II: replication of a worksite health promotion trial

The purpose of this study was to evaluate the effects of a revised worksite health promotion program that featured an employee steering committee/menu approach to intervention. The "Take Heart II" program was evaluated using a quasi-experimental matched-pair design with worksite as the unit of analysis. Experimental and control worksites did not differ on baseline organizational or employee demographic variables or on baseline levels of dependent variables. Outcome and process results revealed consistent, but modest effects favoring intervention worksites on most measures. Cross-sectional analyses generally failed to produce statistically significant intervention effects, but cohort analyses revealed significant beneficial effects of the Take Heart II intervention on eating patterns, behavior change attempts, and perceived social support. Neither analysis detected a beneficial effect of intervention on cholesterol levels.

Effective group behavioral intervention for older periodontal patients

A randomized clinical trial assessed the effect of a group-based behavior modification intervention on oral hygiene skills, adherence and clinical outcomes for older periodontal patients. Subjects (n = 107) were aged 50-70 yr with moderate periodontal disease. They were randomly assigned to usual care or intervention. Intervention consisted of 5 weekly, 90-min sessions that included skill training, self-monitoring, weekly feedback about bleeding points and group support focused on long-term habit change. Four-month follow-up indicated significant improvements in the intervention versus the usual periodontal maintenance group for oral hygiene skills and self-reported flossing (p < 0.001), plaque, gingival bleeding, bleeding upon probing throughout the mouth, and pocket depth for sulcus depths that measured between 3 and 6 mm at baseline (p < 0.009). Group oral health intervention provides an effective and relatively inexpensive means of helping patients improve their self-care skills and achieve high levels of adherence to an effective self-care regimen.

Tobacco cessation interventions in health care settings: rationale, model, outcomes

Health care settings provide opportunities to reach populations of tobacco users with personalized cessation assistance. We describe a model for doing so which emphasizes a team approach, minimizes the burden on clinicians, and uses brief counseling by allied professionals, videos, written materials, and telephone calls to augment clinician advice. The model has been implemented in several diverse settings including outpatient, inpatient, and dental clinic managed care; fee-for-service dentistry and pediatric practices; and planned parenthood clinics. Data from several randomized trials support the effectiveness of the approach. The brief, low-intensity interventions derived from the model appear to be sustainable on a routine basis in many settings.

Brief assessments of dietary behavior in field settings

Our research team is involved in ongoing research in both worksites and medical office settings. These settings offer great potential for reaching individuals who would not otherwise participate in health promotion, but they also place considerable constraints on assessment time and efforts, especially if one's goal is to attract a high and representative proportion of employees or patients. This paper reports on our experience with measures of dietary behavior in these two settings. We found it problematic to collect detailed assessments such as 4-day food records or comprehensive food frequency/history checklists in worksites or medical office settings using population-based samples. Instead, we recommend and provide data on the utility of a dietary-fat screening instrument, and on the Food Habits Questionnaire (FHQ-Kristal, Shattuck, & Henry, 1990), a brief measure of dietary behaviors associated with high-fat eating patterns. The FHQ, in particular, was found to correlate well with other more costly and time-consuming methods of assessment, to be reliable and responsive to intervention effects, and to provide behavioral targets for intervention. The strengths and limitations of these measures for tailoring intervention and assessing outcomes are discussed.

Recruitment for phase II of the Trials of Hypertension Prevention. Effective strategies and predictors of randomization. Trials of Hypertension Prevention (TOHP) Collaborative Research Group

Phase II of the Trials of Hypertension Prevention is a multicenter, randomized, controlled trial designed to determine the efficacy of weight loss and reduction of sodium intake for lowering blood pressure and incidence of hypertension among persons with high-normal levels of blood pressure. The 2 x 2 factorial study design includes weight loss alone, restricted sodium intake alone, the combination of weight loss and sodium restriction, and a control group. Nine clinical centers used a variety of recruitment strategies to enroll 2382 participants over 17 months, which exceeded the sample size goal of 2250. Among randomized participants, 21% were minorities and 34% were women. Overall, direct mail generated the most randomized participants (73%), followed by community screening (12%) and media advertisement (11%). Referrals from community health care providers yielded few participants. Prescreening improved overall efficiency and reduced costs. Participants who were more likely to drop out voluntarily during the three-visit screening regimen tended to be younger, single, male, smokers, and less educated.

Design of a multicenter trial to evaluate long-term life-style intervention in adults with high-normal blood pressure levels. Trials of Hypertension Prevention (phase II). Trials of Hypertension Prevention (TOHP) Collaborative Research Group

Phase II of the Trials of Hypertension Prevention (TOHP) is a multicenter, randomized trial sponsored by the National Heart, Lung, and Blood Institute designed to test whether weight loss alone, sodium reduction alone, or the combination of weight loss and sodium reduction will decrease diastolic (DBP) and systolic blood pressure (SBP) as well as the incidence of hypertension (DBP > or = 90 mm Hg, SBP > or = 140 mm Hg, and/or use of antihypertensive medications) in subjects with high-normal DBP (83 to 89 mm Hg) and SBP less than 140 mm Hg at entry. These interventions were chosen for longer-term testing with end points including hypertension prevention as well as blood pressure (BP) change based on their demonstrated short-term efficacy in reducing BP in phase I of TOHP. The phase II study population is comprised of 2382 participants (1566 men and 816 women) who are 110 to 165% of desirable body weight, allocated at random to the four treatment arms using a 2 x 2 factorial design. The trial has 80% power to detect an overall treatment effect on DBP of 1.2 mm Hg for weight loss or sodium reduction and a difference of 1.6 mm Hg between the combined intervention and placebo groups. BP observers are blinded to participant treatment assignments. Participants will be followed for 3 to 4 years. This trial may have important public policy implications concerning the ability of life-style modifications to reduce BP and prevent the development of hypertension over the long term, thereby avoiding the need for drug therapy which while effective is costly and may have side effects.

Take heart: results from the initial phase of a work-site wellness program

OBJECTIVES

The purpose of this study was to evaluate the short-term effects of a low-intensity work-site heart disease risk reduction program using a matched pair design with work site as the unit of analysis.

METHODS

Twenty-six heterogeneous work sites with between 125 and 750 employees were matched on key organization characteristics and then randomly assigned to early or delayed intervention conditions. Early intervention consisted of an 18-month multifaceted program that featured an employee steering committee and a menu approach to conducting key intervention activities tailored to each site.

RESULTS

Cross-sectional and cohort analyses produced consistent results. At the conclusion of the intervention, early and delayed intervention conditions did not differ on changes in smoking rates, dietary intake, or cholesterol levels. There was considerable variability in outcomes among work sites within each condition.

CONCLUSIONS

Despite documented implementation of key intervention activities and organization-level changes in terms of perceived support for health promotion, this intervention did not produce short-term improvements beyond secular trends observed in control work sites. Research is needed to understand determinants of variability between work sites.

Modifying dietary and tobacco use patterns in the worksite: the Take Heart Project

This article describes the conceptual basis, design, and intervention approach for a worksite-based heart disease risk reduction project. Baseline characteristics of the 26 moderate size worksites participating in the Take Heart Project are also described. The trial is designed to produce changes at both the organization and employee level on tobacco use, dietary fat intake, and serum cholesterol. A key feature of the intervention is creation of employee steering committees to enhance ownership and involvement. From a menu of brief, low-intensity health education and environmental change activities, these committees select activities best suited to their worksite. The baseline characteristics of organizations randomized to intervention and control conditions were similar, and indicated a relatively high level of worksite activity related to cholesterol and smoking.

Preventing falls among community-dwelling older persons: results from a randomized trial

A randomized trial of falls prevention program that addressed home safety, exercise, and behavioral risks was conducted with 3,182 independently living HMO members age 65 and older. The intervention decreased the odds of falling by 0.85, but only reduced the average number of falls among those who fell by 7%. The effect was strongest among men age 75 and older. The likelihood of avoiding falls requiring medical treatment was not significantly affected by the intervention. We conclude that the intervention dose was not of sufficient intensity or duration to have a marked protective effect on older persons. Future research should focus on more intensive intervention approaches because serious falls do not appear to be amendable to low-intensity environment/behavioral efforts.

Biochemical validation of smoking status: pros, cons, and data from four low-intensity intervention trials

Biochemical validation of smoking status has long been considered essential, but recent reports have questioned its utility in certain kinds of field trials. We describe efforts to biochemically validate self-reports of smoking cessation from participants in four large-scale randomized trials in outpatient clinics, hospitals, worksites, and dental clinics. These studies included over 5,000 adults smokers who participated in the population-based low-intensity intervention evaluations. At a 1-year follow-up, 798 subjects reported no tobacco use. We attempted to verify these reports using saliva continine/carbon monoxide validation procedures. Overall, there was a moderately high nonparticipation rate (27%), a low disconfirmation rate (4%), and a high self-reported relapse rate (12%) in the interval between survey and biochemical validation. There were no differences between intervention and control conditions on any of the above variables. Longer durations of self-reported abstinence were strongly related to increased probability of biochemical confirmation. Differences in results across projects were related to how biochemical validation was conducted. These results, as well as statistical power considerations, raise questions about whether biochemical validation procedures are practical, informative, or cost-effective in such population-based, low-intensity intervention research.

Results of a year-long incentives-based worksite smoking-cessation program

This study evaluated the impact of a year-long incentives-based worksite smoking-cessation program. Nineteen moderate-sized worksites, employing a total of approximately 1100 smokers, were randomized to Incentive or No Incentive conditions. All identified smokers in the worksite were considered as subjects, whether or not they participated in the intervention. Analyses were conducted at both the worksite and individual level, and using both self-reported and biochemically validated cessation as endpoints. The incentive program did not significantly improve cessation rates at either the 1-year or 2-year follow-up assessments. We conclude that more broadly focused interventions that also address worksite smoking policies, skills training, and cessation resources, or programs that target additional risk factors are needed to substantially enhance quit rates.

Nurse-assisted counseling for smokers in primary care

OBJECTIVE

Physician-delivered advice to stop smoking is effective, but time demands often reduce the number of smokers who receive assistance. We evaluated three nurse-assisted interventions designed to minimize physician burden and increase counseling in primary care settings.

DESIGN

Randomized controlled trial with a 12-month follow-up.

SETTING

Internal medicine and family practice offices in a health maintenance organization.

PARTICIPANTS

Smokers (n = 3161) who were patients of participating physicians or other medical care providers (n = 60).

INTERVENTION

Medical care providers delivered a 30-second stop-smoking prompt to 2707 smokers and referred them to an on-site nurse smoking counselor. The nurse randomly provided a two-page pamphlet (advice control) or one of three nurse-assisted interventions: 1) self-quit training; 2) referral to a group cessation program; or 3) a combination of self-quit training and referral. Each nurse-delivered intervention included a 10-minute video, written materials, and a follow-up phone call.

RESULTS

Physicians delivered brief advice to 86% of identified smokers during the 1-year program. The proportion of participants reporting abstinence after both 3 and 12 months of follow-up nearly doubled (P = 0.01) for the nurse-assisted self-quit (7.1%), group-referral (7.6%), and combination (6.9%) interventions, compared to brief physician advice alone (3.9%) (P < 0.05). Saliva cotinine tests confirmed these effects (P < 0.004), although quit rates were lower (3.4%, 4.7%, 4.3%, and 2.3%, respectively) because roughly one half of quitters chose not to provide a saliva sample and were counted as smokers.

CONCLUSION

Involving nurses in counseling smokers reduces physician burden, makes counseling more likely, and significantly increases cessation rates compared with brief physician advice alone.