Cardiac rehabilitation participation patterns in a large, tertiary care center: evidence for selection bias

Female sex is independently associated with reduced inpatient mortality after endovascular repair of blunt thoracic aortic injury

BACKGROUND

Female sex has been associated with decreased mortality after blunt trauma, but whether sex influences the outcomes of thoracic endovascular aortic repair (TEVAR) for traumatic blunt thoracic aortic injury (BTAI) is unknown.

METHODS

In this retrospective study of a prospectively maintained database, the Vascular Quality Initiative registry was queried from 2013 to 2020 for patients undergoing TEVAR for BTAI. Univariate Student's t-tests and χ² tests were performed, followed by multivariate logistic regression for variables associated with inpatient mortality.

RESULTS

Of 806 eligible patients, 211 (26.2%) were female. Female patients were older (47.9 vs 41.8 years, P < .0001) and less likely to smoke (38.3% vs 48.2%, P = .044). Most patients presented with grade III BTAI (54.5% female, 53.6% male), followed by grade IV (19.0% female, 19.5% male). Mean Injury Severity Scores (30.9 + 20.3 female, 30.5 + 18.8 male) and regional Abbreviated Injury Score did not vary by sex. Postoperatively, female patients were less likely to die as inpatients (3.8% vs 7.9%, P = .042) and to be discharged home (41.4% vs 52.2%, P = .008). On multivariate logistic regression, female sex (odds ratio [OR]: 0.05, P = .002) was associated with reduced inpatient mortality. Advanced age (OR: 1.06, P < .001), postoperative transfusion (OR: 1.05, P = .043), increased Injury Severity Score (OR: 1.03, P = .039), postoperative stroke (OR: 9.09, P = .016), postoperative myocardial infarction (OR: 9.9, P = .017), and left subclavian coverage (OR: 2.7, P = .029) were associated with inpatient death.

CONCLUSIONS

Female sex is associated with lower odds of inpatient mortality after TEVAR for BTAI, independent of age, injury severity, BTAI grade, and postoperative complications. Further study of the influence of sex on postdischarge outcomes is needed.

A Half-Century of Evidence-Based Cardiac Rehabilitation: A Historical Review

OBJECTIVE

To review the achievements of cardiac exercise rehabilitation programs retrospectively and to identify continuing challenges to their success.

METHODS

A review of files accumulated while working with the Toronto Rehabilitation Center, updated by articles identified by PUB-MED, OVID, and Google Scholar through February 2019.

RESULTS

After the early lead of Israeli physicians, cardiac rehabilitation began in Ontario during the 1960s and quickly attracted a large case load. Recurrence rates of the patients recruited were low relative to those receiving standard medical treatment, even after allowing for differences in risk factors at entry to programs. Controlled trials began but were individually of insufficient in size to show a significant reduction in recurrences or mortality. Subsequently, multiple meta-analyses demonstrated a 20% to 25% reduction of all-cause and cardiac mortality over the first few years of follow-up in patients who persisted with their rehabilitation. Compliance continued a problem at many centers, but special features of the Toronto cardiac rehabilitation program sustained a compliance of 82.8% over 3 years. Although vigorous exercise increased the immediate risks of a recurrence 5- to 10-fold, this was more than offset by the long-term benefits of enhanced physical condition, and cardiac deaths were a rarity during either supervised or home-based exercise sessions. About a half of patients developed a depression immediately after infarction, but if encouraged to persist with prescribed exercise, their quality of life progressively improved. Among the wide variety of mechanisms underlying the benefits of exercise, gains of aerobic power seemed particularly important. With sustained training, the physical condition of some younger patients progressed to the point of participating successfully in marathon events. Older patients also benefited from sustained training, but for them, optimal results were likely associated with less rigorous physical demands.

CONCLUSIONS

Research conducted in Toronto and elsewhere has established the benefits of exercise-centered cardiac rehabilitation. However, there remains a need to define the optimum timing of program onset, and the frequency, intensity, and duration of supervised training sessions. Return to blue-collar occupations also needs to be boosted, and the limited participation of eligible patients in available programs remains a continuing challenge.

Underutilization of Hospital-based Cardiac Rehabilitation after Acute Myocardial Infarction in Korea

BACKGROUND

Cardiac rehabilitation (CR) after acute myocardial infarction (AMI) is recommended as a mandatory intervention in several national clinical practice guidelines published in America, Europe, and Korea to reduce recurrence and mortality. However, underutilization of CR is an established worldwide issue. In Korea, the promotion of CR is expected due to coverage by National Health Insurance. Nevertheless, the national status of CR use has not been reported. This retrospective cohort study aimed to investigate the current status of CR use in patients with AMI using nationwide data from the National Health Insurance Service of Korea.

METHODS

Patients with AMI admitted with the diagnosis of 'I21' code (from International Classification of Diseases, 10th revision, Clinical Modification) from July 1st, 2017 to June 30th, 2018 were included. CR use was defined as CR treatment or evaluation being performed during an outpatient follow-up period within 6 months after discharge. Participation rate and density were calculated nationally and by administrative division. Logistic regression analysis was performed to identify the influencing factors of CR participation.

RESULTS

Nationally, 1.5% of AMI patients (960/64,982) underwent CR during outpatient treatment after discharge. CR density was approximately 10. Logistic regression analysis revealed that influencing factors included old age, female sex, rural residence, and low Charlson comorbidity index.

CONCLUSION

Hospital-based CR after AMI is underutilized despite its coverage by the National Health Insurance. More CR facilities have to be installed according to the needs of CR in various regions.

Lessons learned from community- and home-based physical activity programs: A narrative review of factors influencing women's participation in cardiac rehabilitation

BACKGROUND

Cardiovascular disease remains a leading cause of death in women. Despite the well-known benefits of cardiac rehabilitation, it remains underutilized, especially among women. Physical activity programs in the community, however, attract a large female population, suggesting that they overcome barriers to physical activity encountered by women. The characteristics of interventions that extend beyond the traditional cardiac rehabilitation model and promote physical activity merit examination.

OBJECTIVES

This narrative review aimed to: (a) summarize women's barriers to attend cardiac rehabilitation; (b) examine the characteristics of community- and home-based physical activity or lifestyle coaching interventions; and (c) discuss which barriers may be addressed by these alternative programs.

METHODS

Studies were included if they: (a) were published within the past 10 years; (b) included ≥70% women with a mean age ≥45 years; (c) implemented a community- or home-based physical activity intervention or a lifestyle education/behavioral coaching program; and (d) aimed to improve physical activity levels or physical function.

RESULTS

Most interventions reported high (≥70%) participation rates and significant increases in physical activity levels at follow-up; some improved physical function and/or cardiovascular disease risk factors. Community- and home-based interventions address women's cardiac rehabilitation barriers by: implementing appealing modes of physical activity (e.g. dancing, group-walking, technology-based balance exercises); adapting the program to meet participants' needs; offering flexible options regarding timing and setting (e.g. closer to home, the workplace or faith-based institutions); and promoting social interactions.

CONCLUSION

Cardiac rehabilitation can be enhanced by understanding the specific needs of women; novel elements such as program offerings, convenient settings and opportunities for socialization should be considered when designing cardiac rehabilitation programs.

Predictors of cardiorespiratory fitness improvement in phase II cardiac rehabilitation

BACKGROUND

Cardiac rehabilitation (CR) improves cardiorespiratory fitness (CRF) and has been shown to reduce cardiovascular events and death. However, data about predictors of fitness improvement during CR are limited and conflicting. The objective of this study was to determine predictors of improvement in metabolic equivalents of task (METs) based on formal exercise testing throughout phase II CR.

METHODS

We retrospectively reviewed 20 671 patients enrolled in phase II CR at our center from 2006 to 2016. Patients who completed 36 sessions and had entry and exit exercise stress tests were included for study. The short form-36 (SF-36) questionnaire was used to assess quality-of-life. Univariate and multivariate regression analyses were performed to determine independent predictors of METs improvement.

RESULTS

Of the full cohort, 827 patients completed 36 sessions and had entry/exit stress test data. The majority of patients (N = 647, 78.2%) had improvement in METs (mean Δ 2.0 ± 1.2 METs), including patients ≥65 and < 65 years old (77% vs 79%, P = 0.46 for difference). METs improvement was negatively associated with body mass index, diabetes, left ventricular dysfunction, and poor baseline fitness; and positively associated with SF-36 score (P < 0.05 for all). After multivariable adjustment, improvement was no longer affected by age, ejection fraction, or baseline fitness. Patients with poor fitness (≤5 METS) and adequate fitness (> 5 METS) both had improvement, with no statistical difference between the groups (P = 0.36).

CONCLUSIONS

In a large cohort of phase II CR patients, improvement in CRF was seen in the majority of patients across all ages, genders, and levels of baseline fitness.

Disparities in Cardiac Rehabilitation Participation in the United States: A SYSTEMATIC REVIEW AND META-ANALYSIS

PURPOSE

Phase 2 cardiac rehabilitation (CR) is a class I recommendation for all patients following an acute cardiac event or cardiac surgery according to the The American Heart Association and the American College of Cardiology Foundation. Studies have shown that there are differences in cardiac rehabilitation participation rates between sociodemographic groups. The purpose of this systematic review and meta-analyses was to synthesize quantitative data on the relationship between outpatient cardiac rehabilitation (OCR) attendance and various sociodemographic factors.

METHODS

We conducted a search of PubMed, PsycINFO, CINAHL, Google Scholar, Dissertations & Theses A&I, and conference abstracts for observational studies conducted in the United States that fit our inclusion criteria. A total of 21 studies were included in our final review and meta-analyses.

RESULTS

Our meta-analyses showed that overall, attenders were younger than nonattenders (mean difference=-3.74 years, 95% CI =-5.87 to -1.61) and the odds of participation were lower among females (OR = 0.59; 95% CI = 0.51-0.69), individuals with a high school degree or less (OR = 0.67; 95% CI = 0.50-0.91), and the uninsured or self-payers (OR = 0.32; 95% CI = 0.14-0.71). Full- or part-time employees were more likely to participate than those not employed (OR = 1.45; 95% CI = 1.08-1.95).

CONCLUSIONS

Our systematic review and meta-analyses showed that there are significant sociodemographic disparities in CR participation. On the basis of this knowledge, clinicians and policy makers should focus on identifying and eliminating barriers to participation.

Cardiac Rehabilitation for Women: A Systematic Review of Barriers and Solutions

Cardiac rehabilitation (CR) services improve various clinical outcomes in patients with cardiovascular disease, but such services are underutilized, particularly in women. The aim of this study was to identify evidence-based barriers and solutions for CR participation in women. A literature search was carried out using PubMed, EMBASE, Cochrane, OVID/Medline, and CINAHL to identify studies that have assessed barriers and/or solutions to CR participation. Titles and abstracts were screened, and then the full-text of articles that met study criteria were reviewed. We identified 24 studies that studied barriers to CR participation in women and 31 studies that assessed the impact of various interventions to improve CR referral, enrollment, and/or completion of CR in women. Patient-level barriers included lower education level, multiple comorbid conditions, non-English native language, lack of social support, and high burden of family responsibilities. We found support for the use of automatic referral and assisted enrollment to improve CR participation. A small number of studies suggest that incentive-based strategies, as well as home-based programs, may contribute to improving CR attendance and completion rates. A systematic approach to CR referral, including automatic CR referral, may help overcome barriers to CR referral in women and should be implemented in clinical practice. However, more studies are needed to help identify the best methods to improve CR attendance and completion of CR rates in women.

Determinants of physical activity after hospitalization for coronary artery disease: the Tracking Exercise After Cardiac Hospitalization (TEACH) Study

BACKGROUND

Little is known about physical activity levels in patients with coronary artery disease (CAD) who are not engaged in cardiac rehabilitation. We explored the trajectory of physical activity after hospitalization for CAD, and examined the effects of demographic, medical, and activity-related factors on the trajectory.

DESIGN

A prospective cohort study.

METHODS

A total of 782 patients were recruited during CAD-related hospitalization. Leisure-time activity energy expenditure (AEE) was measured 2, 6 and 12 months later. Sex, age, education, reason for hospitalization, congestive heart failure (CHF), diabetes, and physical activity before hospitalization were assessed at recruitment. Participation in cardiac rehabilitation was measured at follow-up.

RESULTS

AEE was 1948+/-1450, 1676+/-1290, and 1637+/-1486 kcal/week at 2, 6 and 12 months, respectively. There was a negative effect of time from 2 months post-hospitalization on physical activity (P<0.001). Interactions were found between age and time (P=0.012) and education and time (P=0.001). Main effects were noted for sex (men more active than women; P<0.001), CHF (those without CHF more active; P<0.01), diabetes (those without diabetes more active; P<0.05), and previous level of physical activity (those active before hospitalization more active after; P<0.001). Coronary artery bypass graft patients were more active than percutaneous coronary intervention (PCI) patients (P=0.033).

CONCLUSIONS

Physical activity levels declined from 2 months after hospitalization. Specific subgroups (e.g. less educated, younger) were at greater risk of decline and other subgroups (e.g. women, and PCI, CHF, and diabetic patients) demonstrated lower physical activity. These groups need tailored interventions.

Women's Social Support and Social Network after Their First Myocardial Infarction; A 4-Year Follow-Up with Focus on Cardiac Rehabilitation

Background: Knowledge about women's recovery following a myocardial infarction (MI) with focus on how their social support and network change over time as a result of participation in a cardiac rehabilitation programme (CRP) is not well established.

Aim: The aim of this study was to describe and compare social support and network changes over a 4-year period in women with a first MI, based on socio-demographic and situational data.

Method: A longitudinal, comparative study with a non-randomised design including pre- and post-tests (1 and 4 years after MI) was carried out in 18 hospitals in Sweden. Consecutively chosen women ( N = 240) answered a questionnaire on the subject of social support and network.

Results: The women who participated in a CRP were mainly dependent upon professional support during the first year after MI ( p < 0.0001), while those who declined to participate in a CRP needed professional support throughout the whole 4-year period ( p = 0.001). Participation in CRP was dependent on the women's age, those under 60 years ( p = 0.050).

Conclusion: There is a need to develop CRPs that are specifically designed for women based on their age and family relationships. Nurses' training programmes should place greater emphasis on cardiac rehabilitation from the perspective of women with focus on professional support.

Improving Cardiac Rehabilitation: A View from the United Kingdom

Cardiac rehabilitation has assumed more prominence over the past decade, due largely to an increase in user demand, an improvement in the evidence base and an enhancement of its status. This paper presents a view from the United Kingdom and suggests some ways in which cardiac rehabilitation can be improved by focusing on a number of key issues: service organisation and delivery, process and outcome measurement, performance management, and education, training and continuing professional development. The paper concludes that there is a need to make cardiac rehabilitation more widely available using creative and flexible approaches to enhance access, participation and adherence.

The addition of depression to the Framingham Risk Equation model for predicting coronary heart disease risk in women

BACKGROUND

Depression is widely considered to be an independent and robust predictor of Coronary Heart Disease (CHD), however is seldom considered in the context of formal risk assessment. We assessed whether the addition of depression to the Framingham Risk Equation (FRE) improved accuracy for predicting 10-year CHD in a sample of women.

DESIGN

A prospective, longitudinal design comprising an age-stratified, population-based sample of Australian women collected between 1993 and 2011 (n=862).

METHODS

Clinical depressive disorder was assessed using the Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders (SCID-I/NP), using retrospective age-of-onset data. A composite measure of CHD included non-fatal myocardial infarction, unstable angina coronary intervention or cardiac death. Cox proportional-hazards regression models were conducted and overall accuracy assessed using area under receiver operating characteristic (ROC) curve analysis.

RESULTS

ROC curve analyses revealed that the addition of baseline depression status to the FRE model improved its overall accuracy (AUC:0.77, Specificity:0.70, Sensitivity:0.75) when compared to the original FRE model (AUC:0.75, Specificity:0.73, Sensitivity:0.67). However, when calibrated against the original model, the predicted number of events generated by the augmented version marginally over-estimated the true number observed.

CONCLUSIONS

The addition of a depression variable to the FRE equation improves the overall accuracy of the model for predicting 10-year CHD events in women, however may over-estimate the number of events that actually occur. This model now requires validation in larger samples as it could form a new CHD risk equation for women.

Smoking and cardiac rehabilitation participation: Associations with referral, attendance and adherence

OBJECTIVE

Continued smoking after a cardiac event greatly increases mortality risk. Smoking cessation and participation in cardiac rehabilitation (CR) are effective in reducing morbidity and mortality. However, these two behaviors may interact; those who smoke may be less likely to access or complete CR. This review explores the association between smoking status and CR referral, attendance, and adherence.

METHODS

A systematic literature search was conducted examining associations between smoking status and CR referral, attendance and completion in peer-reviewed studies published through July 1st, 2014. For inclusion, studies had to report data on outpatient CR referral, attendance or completion rates and smoking status had to be considered as a variable associated with these outcomes.

RESULTS

Fifty-six studies met inclusion criteria. In summary, a history of smoking was associated with an increased likelihood of referral to CR. However, smoking status also predicted not attending CR and was a strong predictor of CR dropout.

CONCLUSION

Continued smoking after a cardiac event predicts lack of attendance in, and completion of CR. The issue of smoking following a coronary event deserves renewed attention.

Education of Physicians and Implementation of a Formal Referral System Can Improve Cardiac Rehabilitation Referral and Participation Rates after Percutaneous Coronary Intervention

BACKGROUND

Cardiac rehabilitation (CR) is an effective preventive measure that remains underutilised in the United States. The study aimed to determine the CR referral rate (RR) after percutaneous coronary intervention (PCI) at an academic tertiary care centre, identify barriers to referral, and evaluate awareness of CR benefits and indications (CRBI) among cardiologists. Subsequently, it aimed to evaluate if an intervention consisting of physicians' education about CRBI and implementation of a formal CR referral system could improve RR and consequently participation rate (PR).

METHODS

Data were retrospectively collected for all consecutive patients who underwent PCI over 12 months. Referral rate was determined and variables were compared for differences between referred and non-referred patients. A questionnaire was distributed among the physicians in the Division of Cardiology to assess awareness of CRBI and referral practice patterns. After implementation of the intervention, data were collected retrospectively for consecutive patients who underwent PCI in the following six months. Referral rate and changes in PRs were determined.

RESULTS

Prior to the intervention, RR was 17.6%. Different barriers were identified, but the questionnaire revealed lack of physicians' awareness of CRBI and inconsistent referral patterns. After the intervention, RR increased to 88.96% (Odds Ratio 37.73, 95% CI 21.34-66.70, p<0.0001) and PR increased by 32.8% to reach 26%. Personal endorsement of CRBI by cardiologists known to patients increased CR program graduation rate by 35%.

CONCLUSIONS

Cardiologists' awareness of CRBI increases CR RR and their personal endorsement improves PR and compliance. Education of providers and implementation of a formal referral system can improve RR and PR.

Women and cardiac rehabilitation: A review of the literature

There is a wide variety of literature available about coronary heart disease (CHD). However much of the research related to CHD has been performed using either exclusively male populations or such small numbers of women that the results from the women studied were unable to be analysed independently. It is apparent that more researchers are focusing on research that examines women's responses to CHD and the care and treatment they receive. The following literature review explores some of the issues related to women's experience of cardiac rehabilitation and demonstrates that women's experience of cardiac rehabilitation may be different to that of men. There is a need for nurses working within this area of practice to have an understanding of women's experience of recovery from a heart attack in order to better meet their needs.

Benefits of exercise training on coronary blood flow in coronary artery disease patients

Every 34 seconds an American experiences a myocardial infarction or cardiac death. Approximately 80% of these coronary artery disease (CAD)-related deaths are attributable to modifiable behaviors, such as a lack of physical exercise training (ET). Regular ET decreases CAD morbidity and mortality through systemic and cardiac-specific adaptations. ET increases myocardial oxygen demand acting as a stimulus to increase coronary blood flow and thus myocardial oxygen supply, which reduces myocardial infarction and angina. ET augments coronary blood flow through direct actions on the vasculature that improve endothelial and coronary smooth muscle function, enhancing coronary vasodilation. Additionally, ET promotes collateralization, thereby, increasing blood flow to ischemic myocardium and also treats macrovascular CAD by attenuating the progression of coronary atherosclerosis and restenosis, potentially through stabilization of atherosclerotic lesions. In summary, ET can be used as a relatively safe and inexpensive way to prevent and treat CAD.

Exercise as a therapeutic intervention in patients with stable ischemic heart disease: an underfilled prescription

Treatment for stable ischemic heart disease may include guideline-directed pharmacologic therapy, coronary revascularization, and lifestyle and behavioral changes, including structured exercise. Of these, regular exercise is arguably one of the most cost-effective yet underused interventions. Most patients with stable ischemic heart disease are eligible for secondary prevention programs, which should include exercise training regimens, but participation in such programs remains suboptimal. This review emphasizes the importance of education for both patients and providers to enhance participation in lifestyle physical activity, structured exercise, or both.

High age predicts low referral of hyperthyroid patients to specialized hospital departments: evidence for referral bias

BACKGROUND

Hospital-based studies may be hampered by referral bias. We investigated how the phenomenon may influence studies of hyperthyroid patients.

METHODS

By means of a computer-based linkage to the laboratory database and subsequent detailed evaluation of subjects with abnormal test results, we prospectively identified all 1148 patients diagnosed with overt hyperthyroidism in a four-year period in and around Aalborg City, Denmark. Each patient was classified according to nosological type of hyperthyroidism. We studied the referral pattern of patients to local hospital units, and analyzed how referral depended on subtype of disease, sex, age, and degree of biochemical hyperthyroidism.

RESULTS

In a 4-year period, 1032 hyperthyroid patients were diagnosed at primary care offices, and 435 of these (42.2%) were referred to specialized units, 92 patients had hyperthyroidism diagnosed in other hospital departments (referral: 43, 46.7%), and 24 patients had hyperthyroidism diagnosed at the specialized unit after referral for other diseases. Patients suffering from Graves' disease (GD; n=474, median age=65.8 years) were referred more often (odds ratio=1.7 [95% confidence interval 1.3-2.2]) than those diagnosed with multinodular toxic goiter (MNTG; n=525, median age=74.6 years). Higher age was associated with less referral of patients suffering from MNTG (referred vs. nonreferred patients, 64.0 vs. 77.4 years, p<0.001) and GD (43.9 vs. 56.4 years, p<0.001), whereas GD patients referred to a hospital had more severe biochemical hyperthyroidism (serum total triiodothyronine, 4.86 vs. 3.79 nmol/L; serum total thyroxine, 204 vs. 180 nmol/L; both p<0.001). Findings were confirmed in multivariate models reporting age as a significant predictor for referral in both GD and MNTG patients (both p<0.001). Among referred hyperthyroid patients (all combined), those aged up to 40 years (referral rate, 66.8%) were represented 11.6 (6.6-20.6) times more often than those aged 80 years and above (referral rate, 14.8%).

CONCLUSIONS

Hyperthyroid patients referred to a specialized hospital unit were younger (GD+MNTG) and had more severe biochemical hyperthyroidism (GD) compared to nonreferred patients. Thus, referral bias may influence hospital-based studies of hyperthyroid patients, and may hamper external generalization of such studies. Whether the referral bias of hyperthyroid patients in Denmark can be generalized to other countries or cultures remains unknown.

Cardiac rehabilitation may not provided a quality of life benefit in coronary artery disease patients

Background

Improvements in patient-reported health-related quality of life (HRQoL) are important goals of cardiac rehabilitation (CR). In patients undergoing coronary angiography for angina and with documented coronary artery disease (CAD), the present study compared HRQoL over 6 months in CR participants and non-participants. Clinical predictors of CR participants were also assessed.

Methods

A total of 221 consecutive patients undergoing angiography for angina with documented CAD and who were eligible for a CR program were recruited. CR participants were enrolled in a six-week Phase II outpatient CR course (31%, n = 68) within 2 months following angiography and the non-participants were included as a control. At baseline (angiography), one and six months post angiography, clinical and HRQoL data were obtained including the Short Form-36 (SF-36) and the Seattle Angina Questionnaire (SAQ). The response rate for the HRQoL assessment was 68% (n = 150). Cross sectional comparisons were age-adjusted and performed using logistic or linear regression as appropriate. Longitudinal changes in HRQoL were assessed using least squares regression. Finally, a multiple logistic regression was fitted with CR participant as the final outcome.

Results

At angiography, the CR non-participants were older, and age-adjusted analyses revealed poorer physical (angina limitation: 54 ± 25 versus 64 ± 22, p <0.05) and mental HRQoL (significant psycho-social distress: 62%, n = 95 versus 47%, n = 32, p <0.05) compared to the CR participants. In addition, the CR participants were more likely to have undergone angiography for myocardial infarction (OR = 2.8, 95% CI 1.5-5.3, p = 0.001). By six months, all patients showed an improvement in HRQoL indices, however the rate of improvement did not differ between the controls and CR participants.

Conclusion

Following angiography, CAD patients reported improvements in both generic and disease-specific HRQoL, however CR participation did not influence this outcome. This may be explained by biases in CR enrollment, whereby acute patients, who may be less limited in HRQoL compared to stable, chronic patients, are targeted for CR participation. Further investigation is required so CR programs maximize the quality of life benefits to all potential CR patients.

Adherence to a cardiac rehabilitation home program model of care: a comparison to a well-established traditional on-site supervised program

Despite the proven benefits of cardiac rehabilitation (CR), adherence to programs remains suboptimal. To improve adherence, alternative models of care, such as using home programs (HP), have been recommended. Little information exists, however, about its effect on adherence in real-world settings. Therefore, this study's primary objective was to compare adherence of patients in an HP and traditional on-site program (TP) model of CR. The secondary objective was to compare their clinical and demographic profiles and changes in cardiovascular fitness. We implemented a retrospective review of 200 consecutively enrolled patients who chose either a TP or HP model. Profile data was collected at intake assessment. Adherence, defined as attendance to prescheduled contacts or on-site visits in each respective cohort, served as a primary outcome measure. Secondary outcomes included completion of program and cardiopulmonary fitness levels at 6 months. We found that the HP cohort had patients who were significantly younger, male (significantly moreso than female), were more geographically removed from the on-site centre, were employed, and (or) had greater cardiopulmonary fitness at initiation. Similar mean attendance (p = 0.21) and completion rates (p = 0.22) were seen between models. Both groups attained similar gains in cardiovascular fitness (p = 0.79). Analysis of adherence shows the HP to be a suitable option for patients who face barriers for TP-CR participation.

Cardiac rehabilitation and quality of life: a systematic review

OBJECTIVE

The objective of this systematic review was to explore the effects of cardiac rehabilitation interventions on the quality of life of patients with coronary heart disease with a specific focus on interventions that could be delivered within the context of a publicly funded health service.

DESIGN

Systematic review of trials reporting quality of life data as an outcome measure. Electronic databases (CINAHL, MEDLINE and PsycINFO) were searched from 1 January 1999 to 25 November 2010 in the English language. Inclusion criteria were: randomised controlled trials of cardiac rehabilitation as configured for a publicly funded health service. Data were extracted by one reviewer and checked by a second reviewer.

RESULTS

The 16 papers reported RCTs conducted in nine countries. Fifteen measurement instruments were utilised to measure quality of life across the different studies precluding a meta-analysis. Four themes emerged from the thematic analysis of the selected papers: physical well-being (including fitness and symptoms); psychological well-being (including anxiety and depression); social well-being (including family life and relationships); and functional status (including return to work and previous life style). Physical domain outcomes suggest that cardiac rehabilitation may improve physical well-being and levels of physical activity and thereby improved levels of physical fitness. Both physical and psychological domain outcomes suggest that home-based interventions are at least as effective as centre-based interventions. Relatively few trials reported on quality of life within the social domain and any difference between centre-based and home-based interventions appeared to favour the home-based intervention.

CONCLUSIONS

This review indicates that cardiac rehabilitation improves the quality of life for coronary heart disease patients and that quality of life improvements have a bi-directional relationship with increased physical activity and vocational status. Further research is needed to explore the relationship of quality of life outcomes to cardiac mortality, the relationship between improved physical well-being and anxiety, and the quality of life and mortality effects of cardiac rehabilitation in older people.

Predicting cardiac rehabilitation attendance in a gender-tailored randomized clinical trial

PURPOSE

This study compared attendance of women participating in a motivationally enhanced, gender-tailored cardiac rehabilitation (CR) program with that of women attending a traditional outpatient CR program. We also sought to determine the significant baseline predictors of attendance of the exercise and education components of the interventions.

METHODS

Data from 252 women with CHD in the randomized clinical trial, the Women's-Only Cardiac Rehabilitation Program, were used in this study. The experimental design used 2 treatment groups: both receiving a comprehensive, 12-week, CR program, with 1 group receiving a gender-tailored, stage-of-change matched, behavioral enhancement using individualized motivational interviewing.

RESULTS

Compared with women in the traditional CR program, women in the gender-tailored program attended significantly more of the prescribed exercise (90% vs 77%) and education sessions (87% vs 56%). Group assignment accounted for about 5% of the variance in exercise attendance (F1,250 = 12.755, P < .001) and about 24% of the variance in education attendance (F1,250 = 77.942, P < .001). After controlling for group assignment, the baseline characteristics of smoking status, marital status, and anxiety accounted for about 17% of the variance in exercise attendance (F5,245 = 10.494, P < .001). Smoking status and marital status were significant baseline predictors of education attendance (F5,245 = 6.115, P < .001) after controlling for group assignment.

CONCLUSIONS

The long-standing, poor attendance of women in CR continues to be an unresolved international challenge. Gender-tailored, stage-matched, CR programs hold promise for enhancing attendance to prescribed protocols. Additional research examining the efficacy of gender-sensitive, motivationally enhanced CR for women compared with generic CR programs is warranted.

Promoting patient uptake and adherence in cardiac rehabilitation

BACKGROUND

Cardiac rehabilitation is an important component of recovery from coronary events but uptake and adherence to such programmes are below the recommended levels. This aim is to update a previous non-Cochrane systematic review which examined interventions that may potentially improve cardiac patient uptake and adherence in rehabilitation or its components and concluded that there is insufficient evidence to make specific recommendations.

OBJECTIVES

To determine the effects of interventions to increase patient uptake of, and adherence to, cardiac rehabilitation.

SEARCH STRATEGY

A previous systematic review identified studies published prior to June 2001. We searched the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library (Issue 4 2007), MEDLINE (2001 to January 2008), EMBASE (2001 to January 2008), CINAHL (2001 to January 2008), PsycINFO (2001 to January 2008), Web of Science: ISI Proceedings (2001 to April 2008), and NHS Centre for Reviews and Dissemination (CRD) databases (Health Technology Assessment (HTA) and Database of Abstracts of Reviews of Effects (DARE)) from 2001 to January 2008. Reference lists of identified systematic reviews and randomised control trials (RCTs) were also checked for additional studies.

SELECTION CRITERIA

Adults with myocardial infarction, coronary artery bypass graft, percutaneous transluminal coronary angioplasty, heart failure, angina, or coronary heart disease eligible for cardiac rehabilitation and randomised or quasi-randomised trials of interventions to increase uptake or adherence to cardiac rehabilitation or any of its component parts. Only studies reporting a measure of adherence were included.

DATA COLLECTION AND ANALYSIS

Titles and abstracts of all identified references were screened for eligibility by two reviewers independently and full papers of potentially relevant trials were obtained and checked. Included studies were assessed for risk of bias by two reviewers.

MAIN RESULTS

Ten studies were identified, three of interventions to improve uptake of cardiac rehabilitation and seven of interventions to increase adherence. Meta-analysis was not possible due to multiple sources of heterogeneity. All three interventions targeting uptake of cardiac rehabilitation were effective. Two of seven studies intended to increase adherence had a significant effect. Only one study reported the non-significant effects of the intervention on cardiovascular risk factors and no studies reported data on mortality, morbidities, costs or health care resource utilisation.

AUTHORS' CONCLUSIONS

There is some evidence to suggest that interventions to increase the uptake of cardiac rehabilitation can be effective. Few practice recommendations for increasing adherence to cardiac rehabilitation can be made at this time. Interventions targeting patient identified barriers may increase the likelihood of success. Further high quality research is needed.

Barriers to participation in cardiac rehabilitation

BACKGROUND

Participation rates in cardiac rehabilitation after myocardial infarction (MI) remain low. Studies investigating the predictive value of psychosocial variables are sparse and often qualitative. We aimed to examine the demographic, clinical, and psychosocial predictors of participation in cardiac rehabilitation after MI in the community.

METHODS

Olmsted County, Minnesota, residents hospitalized with MI between June 2004 and May 2006 were prospectively recruited, and a 46-item questionnaire was administered before hospital dismissal. Associations between variables and cardiac rehabilitation participation were examined using logistic regression.

RESULTS

Among 179 survey respondents (mean age 64.8 years, 65.9% male), 115 (64.2%) attended cardiac rehabilitation. The median (25th-75th percentile) number of sessions attended within 90 days of MI was 13 (5-20). Clinical characteristics associated with rehabilitation participation included younger age (odds ratio [OR] 0.95 per 1-year increase), male sex (OR 1.93), lack of diabetes (OR 2.50), ST-elevation MI (OR 2.63), receipt of reperfusion therapy (OR 7.96), in-hospital cardiologist provider (OR 18.82), no prior MI (OR 4.17), no prior cardiac rehabilitation attendance (OR 3.85), and referral to rehabilitation in the hospital (OR 12.16). Psychosocial predictors of participation included placing a high importance on rehabilitation (OR 2.35), feeling that rehabilitation was necessary (OR 10.11), better perceived health before MI (excellent vs poor OR 7.33), the ability to drive (OR 6.25), and post-secondary education (OR 3.32).

CONCLUSIONS

Several clinical and psychosocial factors are associated with decreased participation in cardiac rehabilitation programs after MI in the community. As many are modifiable, addressing them may improve participation and outcomes.

Predictors of cardiac rehabilitation referral in coronary artery disease patients: findings from the American Heart Association's Get With The Guidelines Program

OBJECTIVES

Our purpose was to determine factors independently associated with cardiac rehabilitation referral, which are currently not well described at a national level.

BACKGROUND

Substantial numbers of eligible patients are not referred to cardiac rehabilitation at hospital discharge despite proven reductions in mortality and national guideline recommendations.

METHODS

We used data from the American Heart Association's Get With The Guidelines program, analyzing 72,817 patients discharged alive after a myocardial infarction, percutaneous coronary intervention, or coronary artery bypass graft surgery between January 2000 and September 2007 from 156 hospitals. We identified factors associated with cardiac rehabilitation referral at discharge and performed multivariable logistic regression, adjusted for clustering, to identify which factors were independently associated with cardiac rehabilitation referral.

RESULTS

Mean age was 64.1 +/- 13.0 years, 68% were men, 79% were white, and 30% had diabetes, 66% hypertension, and 52% dyslipidemia; mean body mass index was 29.1 +/- 6.3 kg/m(2), and mean ejection fraction 49.0 +/- 13.6%. All patients were admitted for coronary artery disease (CAD), with 71% admitted for myocardial infarction. Overall, only 40,974 (56%) were referred to cardiac rehabilitation at discharge, ranging from 53% for myocardial infarction to 58% for percutaneous coronary intervention and to 74% for coronary artery bypass graft patients. Older age, non-ST-segment elevation myocardial infarction, and the presence of most comorbidities were associated with decreased odds of cardiac rehabilitation referral.

CONCLUSIONS

Despite strong evidence for benefit, only 56% of eligible CAD patients discharged from these hospitals were referred to cardiac rehabilitation. Increased physician awareness about the benefits of cardiac rehabilitation and initiatives to overcome barriers to referral are critical to improve the quality of care of patients with CAD.

Hopelessness and its effect on cardiac rehabilitation exercise participation following hospitalization for acute coronary syndrome

PURPOSE

Hopelessness has been associated with a higher risk of fatal and nonfatal coronary heart disease, yet very few studies have examined hopelessness after a cardiac event. This investigation examined hopelessness as an independent predictor of participation in a hospital-based cardiac rehabilitation exercise program.

METHODS

A total of 207 patients with acute coronary syndrome were interviewed at 3 and 8 months after hospital discharge. Measures included 1 factor of the Beck Hopelessness Scale, the Center for Epidemiological Studies Depression Scale, the Activity Status Index, the Charlson Comorbidity Index, a sociodemographic variables tool, and a cardiac rehabilitation exercise participation questionnaire.

RESULTS

Random-effects logistic regression analysis revealed that hopelessness persisted over time and was an independent predictor of lower exercise participation. In contrast, depression showed no significant influence on exercise participation.

CONCLUSIONS

Study findings suggest the importance of assessing hopelessness in patients with acute coronary syndrome and identifying approaches to exercise recommendations that directly address hopelessness. Interventions focused on the prevention and treatment of hopelessness symptoms may contribute to improved recovery of patient with acute coronary syndrome.

Drugs are not enough: the metabolic syndrome--a call for intensive therapeutic lifestyle change

Whether intensive pharmacologic cardiovascular risk factor management reduces metabolic syndrome (MetS) prevalence is unknown. The authors compared the number of secondary prevention medications and National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III)-defined MetS prevalence in coronary artery disease patients entering cardiac rehabilitation from 1996 to 2001 (period 1, n=516) with those entering from 2002 to 2006 (period 2, n=609). Age, sex, and ethnicity were similar in both periods. From period 1 to period 2, participants took more secondary prevention medications (2.8+/-1.3 vs 3.5+/-1.0, P<.001). Prevalence of low high-density lipoprotein cholesterol (66% vs 66%), diabetes (37% vs 38%), and hypertension (81% vs 81%) were unchanged. The prevalence of hypertriglyceridemia decreased (48% vs 36%, P<.001), but the proportion meeting criteria for elevated waist circumference increased (51% vs 58%, P<.05), resulting in no change in overall MetS prevalence (60% vs 59%, P=NS). More emphasis on therapeutic lifestyle change in addition to intensive pharmacologic therapy is needed to reduce MetS prevalence in patients with coronary artery disease.

Efficacy of a home-based exercise program for orthotopic heart transplant recipients

BACKGROUND

A hospital-based cardiac rehabilitation program can significantly improve the cardiopulmonary endurance and quality of life (QOL) in patients after orthotopic heart transplantation (OHT). Home-based programs for these patients have advantages of low cost and high accessibility, but little is known about their efficacy. This prospective study was designed to evaluate the effect of an 8-week home-based exercise program on muscular strength and endurance of lower limbs, aerobic capacity and QOL in OHT recipients.

METHODS

Thirty-seven OHT recipients were randomized into exercise (n = 14) or control (n = 23) groups. Exercise group subjects were to exercise at least 3 times a week for 8 weeks. Each subject was evaluated by Cybex testing of right quadriceps strength and endurance, 1-min sit-to-stand test, a symptom-limited maximal exercise test and QOL assessment before and after 8 weeks.

RESULTS

Subjects in the exercise group improved significantly in sit-to-stand test, fatigue index of the right quadriceps, maximal workload achieved and physical domain of QOL compared to controls after 8 weeks, regardless of older age and lower value for sit-to-stand test at baseline.

CONCLUSIONS

OHT recipients can significantly improve their muscular endurance, sit-to-stand test scores and QOL after a medically directed home-based exercise program.

Utilization of the internet to deliver cardiac rehabilitation at a distance: a pilot study

Less than 25% of eligible patients attend cardiac rehabilitation programs (CRP), with geographical proximity being a predominant barrier. Therefore, we undertook a pilot study to assess the feasibility and safety of using the Internet as a medium for delivery of an interactive "virtual" CRP (vCRP) to patients at a distance. Fifteen patients on the waiting list for a local hospital-based CRP were randomized to either an Internet-based vCRP or observational control. The vCRP consisted of on-line intake forms, one-on-one chat sessions with a nurse, dietitian, and exercise specialist, downloadable exercise heart rate monitoring, education and data monitoring of blood pressure, weight, and glucose. Participants were assessed for exercise capacity, risk factors, and lifestyle behaviors at baseline and at 12 weeks. Those in the vCRP logged onto the Internet-based CRP an average of 4.2 times per week. There were no adverse events in the vCRP participants. The vCRP group significantly improved their HDL-C, triglycerides, total cholesterol:HDL-C ratio, exercise capacity as assessed in metabolic equivalents, weekly physical activity, and exercise specific self-efficacy (p < 0.05). There were no significant improvements in the control group. Improvements in the vCRP group were similar to historical controls in a standard CRP. Feedback from exit interviews of the vCRP participants was unanimously positive. This Internet-based CRP resulted in clinically significant improvements in risk factors and exercise capacity similar to that of a standard CRP. The high user acceptance indicated that this program may have the potential to effectively manage patients who do not have access to traditional hospital-based CRP.

Effects of expanded cardiac rehabilitation on psychosocial status in coronary artery disease with focus on type D characteristics

Type D personality has been shown to increase the risk for cardiovascular events in patients with coronary artery disease (CAD). We investigated the effects of expanded cardiac rehabilitation on type D score and psychosocial characteristics in 224 CAD patients randomised to either expanded cardiac rehabilitation (stress management, increased physical training, stay at a "Patient Hotel" after discharge and cooking sessions), or routine rehabilitation. Follow-up was 1 year. At baseline patients with a high type D score [patients in the upper quartile of type D score (Q4) i.e., type D patients] had a lower sense of coherence (p < 0.001), a lower quality of life (p < 0.001), more depressive symptoms (p < 0.001) and increased anxiety (p < 0.001) as compared to patients with a low type D score (Q1). During follow-up, type D patients (Q4) randomised to intervention had significant decrements in type D-score (p < 0.01), depression and anxiety (p < 0.05) and an increment in quality of life scores (p < 0.001). Quality of life was also improved in control type D patients (Q4; p < 0.01) but no significant changes were seen in type D score, depression or anxiety. Expanded cardiac rehabilitation reduces type D score, anxiety and depressive symptoms, and improves the quality of life in type D patients.

Universal access: but when? Treating the right patient at the right time: access to cardiac rehabilitation

The Canadian Cardiovascular Society formed an Access to Care Working Group ('Working Group') in the spring of 2004. The mandate of the group was to use the best science and information to establish reasonable triage categories and safe wait times for access to common cardiovascular services and procedures. The present commentary presents the rationale for benchmarks for cardiac rehabilitation (CR) services. The Working Group's search for evidence included: a full literature review of the efficacy of CR, and the factors affecting access and referral to CR; a review of existing guidelines for access to CR; and a national survey of 14 CR programs across Canada undertaken in May 2005 to solicit information on referral to, and wait times for, CR. The Working Group also reviewed the results of The Ontario Cardiac Rehabilitation Pilot Project (2002) undertaken by the Cardiac Care Network of Ontario, which reported the average and median wait times for CR. Some international agencies have formulated their own guidelines relating to the optimal wait time for the onset of CR. However, due to the limited amount of supporting literature, these guidelines have generally been formed as consensus statements. The Canadian national survey showed that few programs had guidelines for individual programs. The Cardiac Care Network of Ontario pilot project reported that the average and median times from a cardiac event to the intake into CR were 99 and 70 days, respectively. The national survey of sampled CR programs also revealed quite remarkable differences across programs in terms of the length of time between first contact to first attendance and to commencement of exercise. Programs that required a stress test before program initiation had the longest wait for exercise initiation. Some patients need to be seen within a very short time frame to prevent a marked deterioration in their medical or psychological state. In some cases, early intervention and advocacy may reduce the risk of loss of employment. Or, there may be profound disturbances in the patient's family as a result of the cardiac event. For other patient groups, preferable wait times vary from one to 30 days, and acceptable wait times vary from seven to 60 days. All cardiovascular disease patients require core aspects of CR services. Patients who would derive benefit from formal CR programs should be provided the opportunity, given the proven efficacy and cost effectiveness of CR.

Psychosocial and Cultural Influences on Cardiovascular Health and Quality of Life Among Hispanic Cardiac Patients in South Florida

This study examined whether psychosocial and cultural factors were related to four dimensions of cardiac-related quality of life (global, physical, emotional, and social functioning) in 120 Hispanic coronary heart disease (CHD) outpatients in south Florida. Survey data were collected on sociodemographic (age, gender, socioeconomic status), psychosocial (depression, social support), and cultural factors (acculturation, familism, fatalism), and quality of life. Medical data on CHD severity (New York Heart Association class, time since diagnosis) were obtained from patients' clinic records. Hierarchical regression analyses revealed that women and patients with more severe CHD had poorer quality of life than men or patients with less severe CHD. Psychosocial and cultural factors were associated with poorer quality of life after controlling for sociodemographic and medical variables: Depression was associated with all four quality of life dimensions (p < .001); and fatalism (p < .05) was associated with lower social functioning in women. These findings identify Hispanic subgroups with poor cardiac-related quality of life that can benefit from special outreach.

Determinants of referral to cardiac rehabilitation programs in patients with coronary artery disease: a systematic review

BACKGROUND

Despite the documented efficacy of cardiac rehabilitation (CR), a minority of patients with diagnosed coronary artery disease are referred. Although referral is a necessary step in the promotion of CR uptake, little is known about its determinants.

PURPOSE

The objective of this paper was to systematically review the available literature on factors predicting referral of patients to CR to appraise both their relative impact and consistency across studies.

METHODS

Studies were identified by searching MEDLINE (1966-2003), CINAHL (1982-2003), HealthSTAR (1975-2003), EMBASE (1966-2003), and The Cochrane Library Controlled Trials. Search terms were "myocardial infarction," "acute myocardial infarction," "coronary artery disease," combined with "rehabilitation," "cardiac rehabilitation," "secondary prevention," "exercise training," "referral," and/or "consultation." Forty-five studies were identified and independently assessed by 2 reviewers using predetermined eligibility criteria.

RESULTS

Ten published observational studies (1999-2004) including 30,333 coronary artery disease patients were selected. Determinants of referral to CR were grouped as sociodemographic, health status, and health care system factors. Major predictors were English speaking (RR 9.56, 95% CI 2.18-41.93), prior myocardial infarction (RR 2.73, 95% CI 1.69-4.42), being admitted to hospitals providing CR (RR 5.35, 95% CI 4.04-7.10), and having insurance coverage (RR 2.94, 95% CI 1.13-7.66).

CONCLUSION

This review highlights disparities in referral to CR and reveals a treatment gap in the secondary prevention of cardiovascular disease. Precise estimates of the impact of all factors on referral are not possible, but some hierarchies and potential priorities for action are evident.

Patient and hospital differences underlying racial variation in outcomes after coronary artery bypass graft surgery

BACKGROUND

Few studies have examined the association of race and outcomes after coronary artery bypass graft (CABG) surgery while controlling for both patient and hospital effects.

METHODS AND RESULTS

We retrospectively analyzed data on a cohort of 566,785 white and 24,354 black Medicare beneficiaries 65 years old and older undergoing CABG in 1091 US hospitals from 1997 to 2000. Mortality and repeat revascularization rates were examined after sequential adjustment for patient and hospital differences by use of generalized estimating equations. Unadjusted mortality was higher (P<0.001) in black than in white patients at 30 (6.4% versus 5.2%), 90 (8.3% versus 6.6%), and 365 days (13.5% versus 9.8%) after surgery. Black patients were more likely (P<0.001) to undergo CABG at hospitals with the highest mortality (56% versus 47%) and at hospitals in the lowest volume quintile (24% versus 20%). Adjusted only for patient characteristics, mortality was 8%, 11%, and 25% higher in black patients at 30, 90, and 365 days. After adjustment for hospital effects, 30 and 90 day mortality was similar but 17% higher in black patients at 365 days. Racial differences in mortality were greater in men than in women. On adjustment for patient and hospital effects, repeat revascularization rates were similar in black and white patients.

CONCLUSIONS

Racial disparities in CABG outcomes are sensitive to the effects of sex and duration of postsurgical follow-up. The increasing disparity in outcomes as follow-up increased is consistent with the hypothesis that black patients have less access to secondary prevention and rehabilitation services after surgery.

Effect of a postoperative telephone intervention on attendance at intake for cardiac rehabilitation after coronary artery bypass graft surgery

BACKGROUND

Enrollment in cardiac rehabilitation (CR) after coronary artery bypass graft (CABG) surgery is suboptimal (25%-30%).

OBJECTIVES

The purpose of this study was to examine the effect of a nurse-initiated telephone call (NIC) on attendance at a CR intake appointment.

METHODS

By using a retrospective cohort design, data were collected on 3536 patients who underwent CABG between April 1996 and March 2000 and were referred to CR. Of these, 2285 patients received standard care (no NIC) and 1251 received the NIC.

RESULTS

Patients who received the NIC were significantly more likely to attend their CR intake appointment compared with standard care (78.1% vs. 50.1%; P < .0001). Hierarchic logistic regression analysis revealed the NIC as the strongest predictor of attendance at a CR intake explaining 56.9% of the total variance (odds ratio =3.429; 95% confidence interval = 2.919-4.028; P < .0001).

CONCLUSION

These findings suggest that pre-appointment telephone contact by a cardiovascular nurse is a valuable tool to enhance attendance at a CR intake appointment after CABG.

Cholesterol ester transfer protein (CETP) Taq1B polymorphism influences the effect of a standardized cardiac rehabilitation program on lipid risk markers

Cardiac rehabilitation programs (CR) are standard treatment for patients with coronary artery disease (CAD), yet a large variation in risk factor and lipoprotein changes exists. We investigated the role of three common genetic polymorphisms (CETP Taq1B, LIPC -514 and apo E) associated with alterations of lipoprotein metabolism, in patients before and after standardized CR. Three-hundred and seven patients were recruited for this study. DNA samples were collected and all three genotypes were determined for every patient. While the hepatic lipase LIPC promoter polymorphism and apo E genotype showed little or no correlation with response to CR, CETP Taq1B showed significant association with changes in plasma lipid and lipoproteins. The B1 homozygotes for CETP Taq1B genotype showed significant reduction in TC (-0.25+/-0.07, p < 0.01), LDL-C (-0.15+/-0.06, p < 0.050) and TG (-0.20+/-0.08, p < 0.05). B2 carriers showed no significant change in these parameters. HDL-C, exercise capacity and BMI improved independent of genotype. Individuals with the B1B1 genotype appear to respond well to CR, whereas B2 carriers exhibit marginal gains in lipoprotein risk factors. Although the B2 carriers had similar benefits in exercise capacity and weight reduction, long-term consequences of little or no change in lipoprotein risk factors require further investigation to establish appropriate management strategies.