Comparative effectiveness research: Using systematic reviews and meta-analyses to synthesize empirical evidence

The increased demand for evidence-based health care practices calls for comparative effectiveness research (CER), namely the generation and synthesis of research evidence to compare the benefits and harms of alternative methods of care. A significant contribution of CER is the systematic identification and synthesis of available research studies on a specific topic. The purpose of this article is to provide an overview of methodological issues pertaining to systematic reviews and meta-analyses to be used by investigators with the purpose of conducting CER. A systematic review or meta-analysis is guided by a research protocol, which includes (a) the research question, (b) inclusion and exclusion criteria with respect to the target population and studies, (c) guidelines for obtaining relevant studies, (d) methods for data extraction and coding, (e) methods for data synthesis, and (f) guidelines for reporting results and assessing for bias. This article presents an algorithm for generating evidence-based knowledge by systematically identifying, retrieving, and synthesizing large bodies of research studies. Recommendations for evaluating the strength of evidence, interpreting findings, and discussing clinical applicability are offered

Appraisals, perceived dyadic communication, and quality of life over time among couples coping with prostate cancer

Little research has examined how prostate cancer patients’ and their spouses’ appraisals of illness and quality of life (QOL) interact with one another. This study examined the interdependent relationships between their appraisals of illness and QOL, and if their perceived dyadic communication mediated these relationships

Psychometric properties of the FACT-G quality of life scale for family caregivers of cancer patients

Purpose This study aimed to examine psychometric properties of a caregiver version of the well-established Functional Assessment of Cancer Therapy-General Scale (FACT-G) after conducting focus groups and obtaining expert input. Methods We made minor wording modifications to the Patient FACT-G to enable caregivers to report how the illness affected their overall quality of life (QOL) and well-being on four subscales (physical, social, emotional, functional). We tested the acceptability, precision, factor structure, reliability and validity of the Caregiver FACT-G among partners of prostate cancer patients (N = 263) and caregivers (spouses, siblings, adult children) of patients with advanced cancer (breast, lung, colorectal, prostate) (N = 484) using data from two Randomized Clinical Trials (RCTs). Results With a factor structure similar to the Patient FACT-G, Caregiver FACT-G was acceptable and precise in measuring caregiver QOL, with high inter-factor correlations and internal consistency reliability (Cronbach’s alphas 0.81–0.91). The Caregiver FACT-G had strong convergent validity demonstrated by significant positive correlations with caregiver self-efficacy (0.25–0.63), dyadic communication (0.18–0.51), and social support (0.18–0.54) in both samples. It also had strong discriminant validity evidenced by significant inverse correlations with negative appraisal of caregiving (− 0.37 to − 0.69), uncertainty (− 0.28 to − 0.53), hopelessness (− 0.25 to − 0.60), and avoidant coping (− 0.26 to − 0.58) in both samples. Caregivers’ baseline FACT-G scores were significantly associated with their physical (0.23) and mental well-being (0.54; 4-month follow-up) and their depression (− 0.69; 3-month follow-up), indicating strong predictive validity. Conclusion This is the first study evaluating the psychometric properties of the Caregiver FACT-G. More psychometric testing is warranted, especially among caregivers of diverse sociocultural backgrounds

The Interdependence of Advanced Cancer Patients' and Their Family Caregivers' Mental Health, Physical Health, and Self-Efficacy over Time

The challenges of advanced cancer have health implications for patients and their family caregivers from diagnosis through end of life. The nature of the patient/caregiver experience suggests that their mental and physical health maybe interdependent, but limited empirical evidence exists.; This study used social cognitive theory as a framework to investigate individual and interpersonal influences on patients' and their family caregivers' mental health, physical health, and self-efficacy as individuals to manage the challenges of advanced disease over time.; Patients and caregivers (484 patient-caregiver dyads) completed surveys at baseline, 3 and 6 months. Longitudinal dyadic analysis techniques were used to examine (i)the influence that patients and caregivers had on their own mental health, physical health, and self-efficacy (actor effects)and (ii) the influence that they had on each other's health outcomes (partner effects). We also examined the influence of self-efficacy on mental and physical health over time.; Consistent with our hypotheses, each person's mental health, physical health, and self-efficacy had significant effects on their own outcomes over time (actor effects). Patients and caregivers influenced one another's mental and physical health (partner effects), but not their self-efficacy. In addition, patients and caregivers with higher self-efficacy had better mental health, and their partners had better physical health.; Patients' and caregivers' mental and physical health were interdependent. Each person's cancer-related self-efficacy influenced their own mental and physical health. However, a person's self-efficacy did not influence the other person's self-efficacy

Interventions with family caregivers of cancer patients: meta-analysis of randomized trials

Family caregivers of cancer patients receive little preparation, information, or support to perform their caregiving role. However, their psychosocial needs must be addressed so they can maintain their own health and provide the best possible care to the patient. The purpose of this article is to analyze the types of interventions offered to family caregivers of cancer patients, and to determine the effect of these interventions on various caregiver outcomes. Meta-analysis was used to analyze data obtained from 29 randomized clinical trials published from 1983 through March 2009. Three types of interventions were offered to caregivers: psychoeducational, skills training, and therapeutic counseling. Most interventions were delivered jointly to patients and caregivers, but they varied considerably with regard to dose and duration. The majority of caregivers were female (64%) and Caucasian (84%), and ranged in age from 18 to 92 years (mean age, 55 years). Meta-analysis indicated that although these interventions had small to medium effects, they significantly reduced caregiver burden, improved caregivers' ability to cope, increased their self-efficacy, and improved aspects of their quality of life. Various intervention characteristics were also examined as potential moderators. Clinicians need to deliver research-tested interventions to help caregivers and patients cope effectively and maintain their quality of life

Individual and family characteristics associated with BRCA1/2 genetic testing in high‐risk families

Background Little is known about family members' interrelated decisions to seek genetic testing for breast cancer susceptibility. Methods The specific aims of this cross‐sectional, descriptive, cohort study were (i) to examine whether individual and family characteristics have a direct effect on women's decisions to use genetic testing for hereditary susceptibility to breast cancer and (ii) to explore whether family characteristics moderate the relationships between individual characteristics and the decision to use genetic testing. Participants were women (>18 years old) who (i) received genetic testing for hereditary breast cancer and who agreed to invite one of their female relatives into the study and (ii) female relatives who had NOT obtained genetic testing and were identified by pedigree analysis as having >10% chances of hereditary susceptibility to breast cancer. Results The final sample consisted of 168 English‐speaking, family dyads who completed self‐administered, mailed surveys with validated instruments. Multivariate conditional logistic regression analyses showed that the proposed model explained 62% of the variance in genetic testing. The factors most significantly associated with genetic testing were having a personal history of cancer; perceiving genetic testing to have more benefits than barriers; having greater family hardiness; and perceiving fewer negative consequences associated with a breast cancer diagnosis. No significant interaction effects were observed. Conclusions Findings suggest that both individual and family characteristics are associated with the decision to obtain genetic testing for hereditary breast cancer; hence, there is a need for interventions that foster a supportive family environment for patients and their high‐risk relatives. Copyright © 2012 John Wiley & Sons, Ltd.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/98211/1/pon3139.pd

Meaning‐based coping, chronic conditions and quality of life in advanced cancer & caregiving

ObjectiveThis study examined the relationship between the number of co‐existing health problems (patient comorbidities and caregiver chronic conditions) and quality of life (QOL) among patients with advanced cancer and their caregivers and assessed the mediating and moderating role of meaning‐based coping on that relationship.MethodsData came from patients with advanced cancers (breast, colorectal, lung, and prostate) and their family caregivers (N = 484 dyads). Study hypotheses were examined with structural equation modeling using the actor‐partner interdependence mediation model. Bootstrapping and model constraints were used to test indirect effects suggested by the mediation models. An interaction term was added to the standard actor‐partner interdependence model to test for moderation effects.ResultsMore patient comorbidities were associated with lower patient QOL. More caregiver chronic conditions were associated with lower patient and caregiver QOL. Patient comorbidities and caregiver chronic conditions had a negative influence on caregiver meaning‐based coping but no significant influence on patient meaning based coping. Caregiver meaning‐based coping mediated relationships between patient comorbidities and caregiver health conditions and patient and caregiver QOL. No significant moderating effects were observed.ConclusionsDespite the severity of advanced cancer for patients and caregivers, the co‐existing health problems of one member of the dyad have the potential to directly or indirectly affect the wellbeing of the other. Future research should consider how the number of patient comorbidities and caregiver chronic conditions, as well as the ability of patients and caregivers to manage those conditions, influences their meaning‐based coping and wellbeing. Copyright © 2016 John Wiley & Sons, Ltd.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/138410/1/pon4146_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/138410/2/pon4146.pd

The influence of dyadic symptom distress on threat appraisals and self-efficacy in advanced cancer and caregiving

Physical and psychological symptoms experienced by patients with advanced cancer influence their wellbeing; how patient and family caregivers' symptom distress influence each other's wellbeing is less understood. This study examined the influence of patient and caregiver symptom distress on their threat appraisals and self-efficacy to cope with cancer