Predicting return to work after acute myocardial infarction. Significance of clinical data, exercise test variables and beta-blocker therapy

Predicting return to work after acute myocardial infarction: Socio-occupational factors overcome clinical conditions

Objectives

Return to work after acute myocardial infarction (AMI), a leading cause of death globally, is a multidimensional process influenced by clinical, psychological, social and occupational factors, the single impact of which, however, is still not well defined. The objective of this study was to investigate these 4 factors on return to work (RTW) within 365 days after AMI in a homogeneous cohort of patients who had undergone an urgent coronary angioplasty.

Participants

We studied 102 patients, in employment at the time of AMI (88.24% of men), admitted to the Department of Cardiology of the University-Hospital of Ferrara between March 2015 to December 2016. Demographical and clinical characteristics were obtained from the cardiological records. After completing an interview on social and occupational variables and the Hospital Anxiety and Depression (HADS) questionnaire, patients underwent exercise capacity measurement and spirometry.

Results

Of the 102 patients, only 12 (12.76%) held a university degree, 68.63% were employees and 31.37% self-employed. The median number of sick-leave days was 44 (IQR 33–88). At day 30, 78.5% of all subjects had not returned to work, at day 60, 40.8% and at day 365 only 7.3% had not resumed working. At univariate analyses, educational degree (p = 0.026), self-employment status (p = 0.0005), white collar professional category (p = 0.020) and HADS depression score were significant for earlier return to work. The multivariate analysis confirms that having a university degree, being self-employed and presenting a lower value of HADS depression score increase the probability of a quicker return to work.

Conclusions

These findings suggest that the strongest predictors of returning to work within 1 year after discharge for an acute myocardial infarction are related more to socio-occupational than to clinical parameters.

Cardiopulmonary exercise testing is predictive of return to work in cardiac patients after multicomponent rehabilitation

BACKGROUND

Return to work (RTW) is a pivotal goal of cardiac rehabilitation (CR) in patients after acute cardiac event. We aimed to evaluate cardiopulmonary exercise testing (CPX) parameters as predictors for RTW at discharge after CR.

METHODS

We analyzed data from a registry of 489 working-age patients (51.5 ± 6.9 years, 87.9 % men) who had undergone inpatient CR predominantly after percutaneous coronary intervention (PCI 62.6 %), coronary artery bypass graft (CABG 17.2 %), or heart valve replacement (9.0 %). Sociodemographic and clinical parameters, noninvasive cardiac diagnostic (2D echo, exercise ECG, 6MWT) and psychodiagnostic screening data, as well as CPX findings, were merged with RTW data from the German statutory pension insurance program and analyzed for prognostic ability.

RESULTS

During a mean follow-up of 26.5 ± 11.9 months, 373 (76.3 %) patients returned to work, 116 (23.7 %) did not, and 60 (12.3 %) retired. After adjustment for covariates, elective CABG (HR 0.68, 95 % CI 0.47-0.98; p = 0.036) and work intensity (per level HR 0.83, 95 % CI 0.73-0.93; p = 0.002) were negatively associated with the probability of RTW. Exercise capacity in CPX (in Watts) and the VE/VCO2-slope had independent prognostic significance for RTW. A higher work load increased (HR 1.17, 95 % CI 1.02-1.35; p = 0.028) the probability of RTW, while a higher VE/VCO2 slope decreased (HR 0.85, 95 % CI 0.76-0.96; p = 0.009) it. CPX also had prognostic value for retirement: the likelihood of retirement decreased with increasing exercise capacity (HR 0.50, 95 % CI 0.30-0.82; p = 0.006).

CONCLUSION

CPX is a valid tool for assessing patients' ability to return to work. Therefore, it may be an essential part of functional assessment during CR for predicting participation in employment.

Benefits and harms of perioperative beta-blockade

Cardiac events in patients undergoing surgery may have serious consequences for both short- and long-term postoperative prognosis. Recently conducted trials have not demonstrated beneficial effects of perioperative beta-blockade, although originally small trials with methodological flaws did suggest this. We evaluate the evidence for using perioperative beta-blockade in both cardiac and non-cardiac surgery, and conclude that there is no statistically significant effect on mortality and insufficient evidence for a reduction of the incidence of mycocardial infarction in meta-analyses of all randomized trials. However, confidence intervals of the intervention effects in the meta-analyses are wide, leaving room for both benefits and harms. The largest observational study performed suggests that perioperative beta-blockade is associated with higher mortality in patients with low cardiac risk or diabetes, and with lower mortality in patients with high cardiac risk undergoing non-cardiac surgery. Larger randomized trials are needed to determine dosage, optimal duration, and safety of therapy, and to identify populations in whom-and how-perioperative beta-blockade may be beneficial.

Work Resumption after Newly Diagnosed Coronary Heart Disease: Findings on the Importance of Paid Leave

OBJECTIVES

Studies have demonstrated the health benefits of work resumption for adults experiencing health problems, but there are important gaps in the research examining the factors that would help these individuals return to work. This study examines if working conditions predict whether women who experience angina or a myocardial infarction (MI) return to work.

METHODS

A sample of 289 employed women from the Nurses' Health Study was analyzed. Bivariate chi-square and logistic regression analyses were conducted to examine the relationship between working conditions and the likelihood of returning to work after experiencing an MI or angina.

RESULTS

Seventy-nine percent of women returned to work after experiencing an MI or angina. Women who had paid leave were substantially more likely to return to work after an MI or angina episode than women without this benefit (adjusted odds ratio [OR] 2.7, p = 0.04).

CONCLUSIONS

Public and corporate policies to promote paid leave for female workers who experience a serious health condition are likely to help these workers return to their jobs, thereby providing important health and economic benefits for both workers and society.

Who retires early and why? Determinants of early retirement pension among Danish employees 57-62 years

The aim of this study was to identify demographic characteristics and occupational determinants of transition from employment to voluntary early retirement pension (ERP). A questionnaire-based survey among 365 employees in Denmark 57-62 years was performed in 2000, with a register-based follow-up 4 years later. Early retirement was associated with increasing age, and lower socioeconomic position. There were weak associations between gender and ERP. Low skill discretion, high conflict in work and two measures of uncomfortable work positions significantly increased the risk of ERP. The study shows that more than half of the eligible population makes use of voluntary ERP, and further indicates a potential for reducing the amount of older employees utilizing this labour market exit option through reducing certain physical and psychosocial exposures in the work environment, independent of age, gender, and socioeconomic position.

Swedish Council on Technology Assessment in Health Care (SBU). Chapter 8. Sick leave due to coronary artery disease or stroke

The assessment of the literature on sick-leave with cardiovascular diseases include only studies with sufficient scientific quality. These studies describe sick leave following stroke, myocardial infarction, coronary artery bypass grafting (CABG), or percutaneous coronary intervention (PCI). We found limited scientific evidence for the following results: After stroke, more than half of the patients of working age returned to work (RTW) during the first year following onset (higher rate for the younger patients). The consequences of brain damage, e.g. impaired ADL ability or cognitive capacity, play an important role in this respect. Also after myocardial infarction most patients RTW. PCI is a milder coronary artery intervention than CABG and RTW is more rapid. However, in the long run there are no differences in sick leave. People at higher ages or with physically demanding jobs return to work to a lesser degree. An international comparison shows that the duration of sick leave due to these conditions in Sweden is longer than in other countries although there is no scientific evidence to support this practice. It appears that the interest in research on sick leave in patients with cardiovascular diseases has waned in recent years. Developments in acute cardiological care should inspire renewed scientific involvement in this area of research.

Resumption and Maintenance of Employment after a First Acute Myocardial Infarction: Sociodemographic, Vocational and Medical Predictors

In a community cohort of 833 women and men aged <60 years, employed at the time of a first acute myocardial infarction (AMI), the relation of sociodemographic, vocational, and medical variables to the following three aspects of employment was investigated longitudinally: resumption of employment anytime within 5 years after AMI, resumption of employment within 3 months of the AMI, and maintenance of employment 5 years after AMI. Different sets of characteristics of persons with a first AMI were related to the different criteria of employment. Only sociodemographic and vocational variables were related to early resumption of employment, whereas maintenance of employment 5 years after AMI was influenced by both medical and nonmedical variables. These results support the importance of examining different aspects of resumption and maintenance of employment after AMI. They also suggest that early resumption of employment after AMI and employment anytime 5 years after AMI are more a function of the sociodemographic and vocational characteristics of the person with the AMI than of that person's medical condition, whereas long-term maintenance of employment after an AMI is also related to the person's medical condition.

Determinants of duration of disability and return-to-work after work-related injury and illness: challenges for future research

BACKGROUND

The purpose of this review was to identify critical data and research needs in addressing the following question: What are the primary factors that affect the time lost from work, return-to-work (RTW), subsequent unemployment, and changes in occupation after disabling illness or injury?

METHODS

Review of the literature to identify research challenges originating from the multitude of disciplines, data sources, outcome measures, and methodological and analytical problems.

RESULTS

About 100 different determinants of RTW outcomes were identified. Their impact varies across different phases of the disablement process. Recommendations are provided for addressing five selected research challenges.

CONCLUSION

Interdisciplinary research needs to develop a comprehensive conceptual framework. Priority should be given to studies on specific domains of risk factors meeting five selection criteria: amenability to change; relevance to users of research; generalizability across health conditions, disability phases, and settings; "degree of promise" as derived from qualitative exploratory studies; and capacity to improve measurement instruments. Combining qualitative and quantitative research methods is necessary to bridge existing knowledge gaps.

Referral to occupational medicine clinics and resumption of employment after myocardial infarction

Rehabilitation after acute myocardial infarction (AMI) consists of education, exercise, and an encouragement to return to work (RTW). This study attempts to (1) determine whether the time interval between AMI and the visit at occupational medicine (OM) clinics predicts resumption of full employment, and (2) estimate the incidence of work-related recurrent AMI after RTW. We followed 216 consecutive AMI patients at a single OM clinic. The independent variables were clinical and personal data, physical workload and time between AMI, and first visit to the OM clinic. The outcome variables were full employment 24 months after the acute event and recurrent AMI during this period. Of all patients, 168 attempted RTW. Of these, 18 stopped working subsequently. Of the remaining 150 patients, 54 returned to part-time work and 96 were employed full-time after 2 years. Logistic regression indicated that a failure to resume full employment was independently associated with diabetes, older age, Q wave AMI, angina before AMI, heavy work, and a late visit to the OM clinic. For each month's delay in referral to the OM clinic, there was a 30% decrease in the chance for full employment 24 months after AMI. Six (4%) of the 150 patients who resumed employment sustained a recurrent AMI, two of them while at work. A delayed referral to the OM clinic was associated with work disability after AMI. Late referrals to OM clinics should receive a more intensive and sustained rehabilitation than early referrals. Whether an earlier referral to OM clinics will result in increased RTW rates is unknown. Patients who attempted to resume employment had a 1.2% risk of a recurrent ischemic event at their workplace.