Measurement of quality of life using EQ-5D in patients on prolonged mechanical ventilation: comparison of patients, family caregivers, and nurses

Fighting to Breathe and Fighting for Health-Related Quality of Life: Measuring the Impact of Being Dependent on Technology for Breathing on the Child and Their Caregiver

BACKGROUND AND OBJECTIVE

Medical advancement has enabled children to survive congenital airway anomalies, rare diseases and critical illnesses with medical technology including tracheostomies and long-term ventilation to support breathing. This study aimed to assess (1) the validity of the EQ-TIPS and EQ-5D-Y-3L in children dependent on technology and (2) the impact of caring for these children on the EQ-5D-5L and CarerQoL.

METHODS

Caregivers of children aged 1 month to 18 years completed the EQ-TIPS or EQ-5D-Y-3L, Pediatric Quality of Life Inventory (PedsQL) and Paediatric Tracheostomy Health Status Instrument (PTHSI) to reflect the child's health. In addition, caregivers self-completed the EQ-5D-5L and CarerQoL. Reports of problems on EQ dimensions were compared across age groups with the Fisher's exact test. Spearman and Pearson's correlation coefficients and Kruskal-Wallis H-test were used to explore the association between caregiver and child scores, concurrent validity, and known-group validity of the EQ-TIPS and EQ-5D-Y-3L.

RESULTS

Responses from 144 caregivers were collected, 66 for children aged 1 month to 4 years completing EQ-TIPS and 78 for children aged 5-18 years completing EQ-5D-Y-3L. The EQ-TIPS showed a higher report of no problems for social interaction for children aged 1-12 months (p = 0.040) than the older age groups, there were however no differences in the level sum score (LSS) or EQ Visual Analogue Scale scores between the age groups. The EQ-5D-Y-3L showed a significantly less report of problems for mobility (p = 0.013) and usual activities (p = 0.006) for children aged 5-7 years compared with children aged 8-12 and children aged 13-18 years. Similarly, the 5-7 years of age group had a significantly lower EQ-5D-Y-3L LSS compared with the older groups (H = 12.08, p = 0.002). The EQ-TIPS and EQ-5D-Y-3L showed moderate-to-strong associations with the PedsQL. EQ-TIPS median LSS was able to differentiate between groups on the clinical prognosis with a better health-related quality of life (HRQoL) in those where weaning from technology is possible compared with those where weaning is not possible (H = 18.98, p = 0.011). The EQ-5D-Y-3L can discriminate between breathing technology, where those with only a tracheostomy reported better HRQoL (H = 8.92, p = 0.012), and between mild and moderate clinical severity (H = 19.42, p < 0.001). Neither the PedsQL nor the PTHSI was able to discriminate between these groups across the age range. Caregiver and child HRQoL scores showed moderate-to-strong associations.

CONCLUSIONS

The EQ-TIPS and EQ-5D-Y-3L showed good validity in children dependent on the technology for breathing. The EQ-TIPS and EQ-5D-Y-3L LSS were all able to differentiate between children with known clinical variables and outperformed both the PedsQL and PTHSI, making them preferable for intervention research. The caregiver scores are associated with the child HRQoL scores and thus a spill-over should be accounted for in any interventions targeting this cohort. It is recommended that future studies investigate the reliability and responsiveness of these measures in children dependent on technology for breathing.

Does Differential Item Functioning Jeopardize the Comparability of Health-Related Quality of Life Assessment Between Patients and Proxies in Patients with Moderate-to-Severe Traumatic Brain Injury?

BACKGROUND

Health-related quality of life (HRQoL) is clearly recognized as a patient-important outcome in patients with traumatic brain injury (TBI). Patient-reported outcomes are therefore often used and supposed to be directly reported by the patients without interpretation of their responses by a physician or anyone else. However, patients with TBI are often unable to self-report because of physical and/or cognitive impairments. Thus, proxy-reported measures, e.g., family members, are often used on the patient's behalf. Yet, many studies have reported that proxy and patient ratings differ and are noncomparable. However, most studies usually do not account for other potential confounding factors that may be associated with HRQoL. In addition, patients and proxies can interpret some items of the patient-reported outcomes differently. As a result, item responses may not only reflect patients' HRQoL but also the respondent's (patient or proxy) own perception of the items. This phenomenon, called differential item functioning (DIF), can lead to substantial differences between patient-reported and proxy-reported measures and compromise their comparability, leading to highly biased HRQoL estimates. Using data from the prospective multicenter continuous hyperosmolar therapy in traumatic brain-injured patients study (240 patients with HRQoL measured with the Short Form-36 (SF-36)), we assessed the comparability of patients' and proxies' reports by evaluating the extent to which items perception differs (i.e., DIF) between patients and proxies after controlling for potential confounders.

METHODS

Items at risk of DIF adjusting for confounders were examined on the items of the role physical and role emotional domains of the SF-36.

RESULTS

Differential item functioning was evidenced in three out of the four items of the role physical domain measuring role limitations due to physical health problems and in one out of the three items of the role emotional domain measuring role limitations due to personal or emotional problems. Overall, despite an expected similar level of role limitations between patients who were able to respond and those for whom proxies responded, proxies tend to give more pessimistic responses than patients in the case of major role limitations and more optimistic responses than patients in the case of minor limitations.

CONCLUSIONS

Patients with moderate-to-severe TBI and proxies seem to have different perceptions of the items measuring role limitations due to physical or emotional problems, questioning the comparability of patient and proxy data. Therefore, aggregating proxy and patient responses may bias HRQoL estimates and alter medical decision-making based on these patient-important outcomes.

Stress on caregivers providing prolonged mechanical ventilation patient care in different facilities: A cross-sectional study

Purpose

Taiwan has implemented an integrated prospective payment program (IPP) for prolonged mechanical ventilation (PMV) patients that consists of four stages of care: intensive care unit (ICU), respiratory care center (RCC), respiratory care ward (RCW), and respiratory home care (RHC). We aimed to investigate the life impact on family caregivers of PMV patients opting for a payment program and compared different care units.

Method

A total of 610 questionnaires were recalled. Statistical analyses were conducted by using the chi-square test and multivariate logistic regression model.

Results

The results indicated no associations between caregivers’ stress levels and opting for a payment program. Participants in the non-IPP group spent less time with friends and family owing to caregiver responsibilities. The results of the family domain show that the RHC group (OR = 2.54) had worsened family relationships compared with the ICU group; however, there was less psychological stress in the RCC (OR = 0.54) and RCW (OR = 0.16) groups than in the ICU group. In the social domain, RHC interviewees experienced reduced friend and family interactivity (OR = 2.18) and community or religious activities (OR = 2.06) than the ICU group. The RCW group felt that leisure and work time had less effect (OR = 0.37 and 0.41) than the ICU group. Furthermore, RCW interviewees (OR = 0.43) were less influenced by the reduced family income than the ICU group in the economic domain.

Conclusions

RHC family caregivers had the highest level of stress, whereas family caregivers in the RCW group had the lowest level of stress.

Prolonged mechanical ventilation and caregiver strain: Home vs. long-term care facility

OBJECTIVE

The number of patients treated with prolonged mechanical ventilation (PMV) is steadily rising. Traditionally treated within specialized long-term care facilities (LTCFs), healthcare providers are increasingly promoting homecare as a technologically safe, humane, and cheaper alternative. Little is known concerning their informal caregivers (ICGs), despite their crucial role in facilitating care. This study examines caregiver strain among the primary ICG of PMV patients treated at home vs. LTCF.

METHOD

This study was an observational cross-sectional study. The study enrolled 120/123 PMV patients ≥18 years within the study region (46 treated with homecare/74 treated at the LTCF) and 106 ICGs (34 ICGs/46 homecare patients and 72 ICGs/74 LTCF patients). Caregiver assessment included the 13-item Modified Caregiver Strain Index (Mod CSI) (0-26 maximum); patient assessment included symptom burden (the revised Edmonton Symptom Assessment System).

RESULTS

The mean age of ICGs was 58.9 years old; 60.4% were females; 82.1% were married; 29.2% were patient's spouses; and 40.6% were patient's children. The total Mod CSI was 13.58 (SD 6.52) and similar between home vs. LTCF (14.30 SD 7.50 vs. 13.26 SD 6.03, p = 0.50), or communicative vs. non-communicative patients (13.50 SD 7.12 vs. 13.64 SD 6.04, p = 0.93). Hierarchical analysis identified three clusters of caregiver strain, with ICGs at home vs. LTCF reporting significantly lower mood strain, higher burden, and similar levels of lifestyle disturbance. In adjusted models, homecare was significantly associated with reduced mood strain and increased burden, while increased patient symptomatology was significantly associated with total strain, mood, and burden strain clusters.

SIGNIFICANCE OF RESULTS

Recognizing the different patterns of caregiver strain at home or LTCF is a prerequisite for addressing their palliative care needs and improving the wellbeing and resilience of informal caregivers, who often play a critical role in deciding whether to treat the PMV patient at home or LTCF.

Proxy responses regarding quality of life of patients with terminal lung cancer: preliminary results from a prospective observational study

OBJECTIVE

This prospective study used the EQ-5D utility and Visual Analogue Scale (VAS) scores to analyse the potential usefulness of proxy responses in quality of life assessments of Japanese patients with terminal lung cancer sufficiently healthy to communicate and reply by themselves. We did not investigate the potential usefulness of using proxy responses for patients who could not respond by themselves.

DESIGN

A prospective observational study.

SETTING

Single centre.

PARTICIPANTS

The EQ-5D and VAS responses were gathered from 30 in-hospital patients with lung cancer for a total of three observation points. At nearly the same time, two nurses responded by providing proxy responses.

PRIMARY AND SECONDARY OUTCOME MEASURES

EQ-5D and VAS responses.

RESULTS

There were no significant differences between the patients' and nurses' responses for EQ-5D utility and VAS scores. For the five dimensions of the EQ-5D, significant differences were found between the patients' and nurses' responses for usual activities (patients' response 1.64±0.07, nurses' response 1.41±0.05, p=0.03) and anxiety/depression (patients' response: 1.40±0.05, nurses' response: 1.19±0.03, p=0.02). There was a significant weak positive correlation between patients' and nurses' responses regarding changes in responses from the first to the third observation point (Spearman's rank correlation coefficient ρ=0.228; p<0.01).

CONCLUSION

The results suggest that proxy responses are useful because there were no significant differences between the patients' and nurses' responses for EQ-5D utility and VAS scores at the three observation points. These findings should, however, be verified in future large-scale trials.

Prolonged Mechanical Ventilation: Symptomatology, Well-Being, and Attitudes to Life

OBJECTIVE

Although prolonged mechanical ventilation (PMV) is increasingly common, little is known concerning patient symptom burden or attitudes toward PMV. This study aims to describe the mood, well-being, distressing symptoms, and attitudes toward prolonged ventilation among PMV patients treated either at home or long-term acute care (LTAC).

DESIGN

An observational study.

SETTING AND PARTICIPANTS

62 communicative participants treated with PMV, aged ≥18 years, insurees of a single HMO, treated at home hospital or LTAC specializing in ventilation in Jerusalem.

MEASURES

Sociodemographic characteristics; chronic conditions; functional status; symptom burden measured by revised Edmonton Symptomatic Assessment System (r-ESAS); attitudes toward PVM.

RESULTS

Participants were aged 61.7 ± 20.7 years, commonly suffered progressive neuromuscular disease (43.5%) or chronic lung disease (29%), were functionally dependent, treated at home (64.5%) or LTAC (35.5%), and had a mean PMV duration of 36.6 months (interquartile range 10.8-114.1). The 5-item, short Geriatric Depression Scale identified depression among 38% of participants, and was less at home vs LTAC (34% vs 44%, P < .001). Mean revised Edmonton Symptom Assessment System score was 24.5 ± 14.8 (maximum severity = 100), and participants reported severe or distressing symptoms for tiredness (27%/20%), pain (10%/25%), anxiety (16%/14%), depression (9%/21%), drowsiness (12%/17%), shortness of breath (9%/15%), poor appetite (7%/9%), and nausea (0%/10%). Impaired general well-being was reported as severe, moderate, mild, or none among 15%, 40%, 30%, and 15%, respectively. Only 1 patient had advance directives concerning ventilation prior to intubation, and when asked if they had to choose again today, 85% of patients would again opt for ventilation.

CONCLUSIONS AND IMPLICATIONS

Few PMV patients reported distressing symptoms, and 85% would choose ventilation if asked again. These findings might be useful in clinical practice to assist in decision making concerning prolonged ventilation.

Palliative medicine family conferences and caregiver psychological distress during prolonged mechanical ventilation

OBJECTIVES

Little is known about the experience of family caregivers of patients who require prolonged mechanical ventilation (PMV). We examined the perspectives of caregivers of patients who died after PMV to explore the role of palliative care and the quality of dying and death (QODD) in patients and understand the psychological symptoms of these caregivers.

METHODS

A longitudinal study was performed in five hospitals in Taipei, Taiwan. Routine palliative care family conferences and optional consultation with a palliative care specialist were provided, and family caregivers were asked to complete surveys.

RESULTS

In total, 136 family caregivers of 136 patients receiving PMV were recruited and underwent face-to-face baseline interviews in 2016-2017. By 2018, 61 (45%) of 136 patients had died. We successfully interviewed 30 caregivers of patients' death to collect information on the QODD of patients and administer the Impact of Event Scale (IES), Hospital Anxiety and Depression Scale (HADS) and Center for Epidemiologic Studies Depression (CES-D) scale to caregivers. We observed that more frequent palliative care family conferences were associated with poorer QODD in patients (coefficients: -44.04% and 95% CIs -75.65 to -12.44), and more psychological symptoms among caregivers (coefficient: 9.77% and 95% CI 1.63 to 17.90 on CES-D and coefficient: 7.67% and 95% CI 0.78 to 14.55 on HADS). A higher caregiver burden at baseline correlated with lower psychological symptoms (coefficient: -0.35% and 95% CI -0.58 to -0.11 on IES and coefficient: -0.22% and 95% CI -0.40 to -0.05 on CES-D) among caregivers following the patients' death. Caregivers' who accepted the concept of palliative care had fewer psychological symptoms after patients' death (coefficient: -3.29% and 95% CI -6.32 to -0.25 on IES and coefficient: -3.22% and 95% CI -5.24 to -1.20 on CES-D).

CONCLUSIONS

Palliative care conferences were more common among family members with increased distress. Higher caregiver burden and caregiver acceptance of palliative care at baseline both predicted lower levels of caregiver distress after death.

Assessing the proxy response bias of EQ-5D-3 L in general population: a study based on a large-scale representative household health survey using propensity score matching

Background

Proxy respondent-someone who assists the intended respondent or responds on their behalf-are widely applied in the measurement of health-related quality of life (HRQL). However, proxies may not provide the same responses as the intended respondents, which may bias the findings.

Objectives

To determine whether the use of proxies is related to socio-demographic characteristics of the intended respondent, and to assess the possible proxy response bias of Chinese version of EQ-5D-3 L in general population.

Methods

A cross-sectional study based on a provincially representative sample from 2013 National Health Service Survey (NHSS) in Shaanxi, China was performed. HRQL was measured by Chinese version of EQ-5D-3 L. Propensity score matching (PSM) was used to get matched pairs of self-reports and proxy-reports. Before and after PSM, univariate logistic and linear models including the indicator of proxy response as the only independent variable, were employed to assess the possible proxy response bias of the dimensional and overall health status of EQ-5D-3 L respectively.

Results

19.9% of the responses involved a proxy. Before PSM, the proxy-report group was younger in age and reported less unhealthy lifestyle, lower prevalence of disease, and less hospitalization than the self-report group. After PSM, it showed that the proxy-report group was statistically more likely to report health problem on each dimension of EQ-5D-3 L, with odds ratios larger than one comparing with self-report group. The means of EQ-5D-3 L index and EQ VAS of proxy-report group were 0.022 and 0.834 lower than self-report group.

Conclusions

Significantly negative proxy response bias was found in Chinese EQ-5D-3 L in general population, and the magnitude of the bias was larger in physical dimensions than psychological dimensions after using PSM to control confounders.

Predicting Mortality and Life Expectancy in Patients under Prolonged Mechanical Ventilation and Maintenance Dialysis

Background: The number of patients receiving prolonged mechanical ventilation (PMV) or maintenance dialysis (MD) is increasing worldwide. Identification of those with a short life expectancy is useful for early referral of palliative care.

Objective: To determine the survival rate, life expectancy, and major prognostic factors in patients under both PMV and MD.

Design: We extracted a 1:3.4 random sample of patients treated with mechanical ventilation (MV) from the National Health Insurance (NHI) Research Database of Taiwan from 2003 to 2007. Subjects who had undergone MD and received MV for longer than 21 days were enrolled.

Setting/Subjects: There were 1035 patients who received both PMV and MD.

Measurements: The survival rates and life expectancy were estimated. A multivariate proportional hazards model was constructed to validate the effects of different prognostic factors, including age, gender, hospital size, and major comorbidities.

Results: The median length of survival of patients under both PMV and MD was 54 days. The three-month, six-month, and one-year survival rates were 40.8%, 24.1%, and 12.6%, respectively. The life expectancies of those older than 70 years were five months; those comorbid with cancer and septicemia were 112 and 90 days, respectively. After adjustments for covariates, we found following prognostic factors were statistically significant: gangrene, peritonitis, liver cirrhosis, cancer, septicemia, hydrocephalus, having device complications, and shock.

Conclusions: More than 85% of patients receiving both PMV and MD died within one year. Communication and early referral for palliative care would be indicated for those comorbid with significant prognostic factors.

The Pictorial Fit-Frail Scale: Developing a Visual Scale to Assess Frailty

Background

Standardized frailty assessments are needed for early identification and treatment. We aimed to develop a frailty scale using visual images, the Pictorial Fit-Frail Scale (PFFS), and to examine its feasibility and content validity.

Methods

In Phase 1, a multidisciplinary team identified domains for measurement, operationalized impairment levels, and reviewed visual languages for the scale. In Phase 2, feedback was sought from health professionals and the general public. In Phase 3, 366 participants completed preliminary testing on the revised draft, including 162 UK paramedics, and rated the scale on feasibility and usability. In Phase 4, following translation into Malay, the final prototype was tested in 95 participants in Peninsular Malaysia and Borneo.

Results

The final scale incorporated 14 domains, each conceptualized with 3–6 response levels. All domains were rated as “understood well” by most participants (range 64–94%). Percentage agreement with positive statements regarding appearance, feasibility, and usefulness ranged from 66% to 95%. Overall feedback from health-care professionals supported its content validity.

Conclusions

The PFFS is comprehensive, feasible, and appears generalizable across countries, and has face and content validity. Investigation into the reliability and predictive validity of the scale is currently underway.

Exploring the views of being a proxy from the perspective of unpaid carers and paid carers: developing a proxy version of the Adult Social Care Outcomes Toolkit (ASCOT)

Background

Outcomes-based policy and administration of public services present a compelling argument for the value of outcomes data. However, there are a number of challenges inherent in collecting these data from people who are unable to complete a paper-based survey or interview due to cognitive or communication impairments. In this paper, we explore the views of being a proxy from the perspective of unpaid carers and paid carers who may be asked to act as a proxy on behalf of the person(s) they care for. We consider the key issues that need to be addressed when adapting an instrument designed to measure social care outcomes, the Adult Social Care Outcomes Tool (ASCOT), into a proxy-report tool.

Methods

Participants took part in either a focus group (35 paid carers in eight focus groups), or a one-to-one interview (eight unpaid carers). All participants were recruited via carer organisations and care providers. Transcripts, field notes and audio data collected during focus groups and interviews were analysed using a thematic framework approach.

Results

Participants agreed that any person acting as a proxy would need to be very familiar with the care recipient, as well as their needs and care provision. A number of provisions for proxy respondents were proposed to improve face validity and acceptability of completing a questionnaire by proxy, and to ensure that any potential bias is reduced in the design of the questionnaire. These included: providing two sets of response options for each proxy perspective (the proxy themselves and the proxy view of how they think the care recipient would respond); a comments box to help people explain why they have selected a given response option (especially where these indicate unmet need); and providing clear guidance for the proxy respondent on how they should complete the questionnaire.

Conclusions

This study has shown some of the challenges involved in assessing outcomes by proxy and explored some potential ways these can be mitigated. The findings highlight the benefits of developing and testing proxy measures in a robust way to widen participation in social care research.

Electronic supplementary material

The online version of this article (10.1186/s12913-019-4025-1) contains supplementary material, which is available to authorized users.

Determinants of Receiving Palliative Care and Ventilator Withdrawal Among Patients With Prolonged Mechanical Ventilation

OBJECTIVES

Increasing numbers of patients with prolonged mechanical ventilation generates a tremendous strain on healthcare systems. Patients with prolonged mechanical ventilation suffer from long-term poor quality of life. However, no study has ever explored the willingness to receive palliative care or terminal withdrawal and the factors influencing willingness.

DESIGN

Cross-sectional study.

SETTING

Five different hospitals of Taipei City Hospital system.

PATIENTS

Adult patients with ventilatory support for more than 60 days.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

We identified the family members of 145 consecutive patients with prolonged mechanical ventilation in five hospitals of Taipei City Hospital system and enrolled family members for 106 patients (73.1%). We collected information from patient families' regarding concepts (knowledge, attitude, and experiences) of palliative care, caregiver burden, family function, patient quality of life, and physician-family communications. From the medical record, we obtained duration of hospitalization, consciousness level, disease severity, medical cost, and the presence of do-not-resuscitate orders. The vast majority of family members agreed with the concept of palliative care (90.4%) with 17.3% of the family members agreeing to ventilator withdrawal currently and 67.5% terminally in anticipation of death. Approximately half of the family members regretted having chosen prolonged mechanical ventilation (56.7%). Reduced patient quality of life and increased family understanding of palliative care significantly associated with increased caregiver willingness to endorse palliative care and withdraw life-sustaining agents in anticipation of death. Longer duration of ventilator usage and hospitalization was associated with increased feelings of regret about choosing prolonged mechanical ventilation.

CONCLUSIONS

During prolonged mechanical ventilation, physicians should thoroughly discuss its benefits and burdens. Families should be given the opportunity to discuss the circumstances under which they might request the implementation of palliative care or withdrawal of mechanical ventilation in order to avoid prolonging the dying process.

Patient, family, nurse perspectives on Chinese elders' quality of life

BACKGROUND

Families and nurses are important care-providers and proxies of older people. Their ability to assess the quality of life of elders in ways that align with how older people assess themselves has policy implications for allocating services and resources to older persons.

AIM

To investigate the alignment of perspectives of the quality of life held by older people, their families and nurses in China.

METHODS

Employing a survey design using concurrent EQ-5D-3L and WHOQOL-BREF surveys, responses from 72 matched stakeholder groups were compared and agreement tested using weighted kappa/one-way random intra-class correlations and paired Student's t-test.

RESULTS

On the more observable dimensions families and nurses were in close agreement with the older person in relation to quality of life reports. However, in the more subjective domains, family and especially nurses tended to estimate that the older person's suffering as more severe than they themselves thought.

CONCLUSION

The perspectives of older patients and their family are more closely aligned regarding the older person's quality of life than that of nurses caring for them, a finding inconsistent with international research.

IMPLICATION FOR NURSING AND HEALTH POLICY

The evidence suggests that nursing work assignment processes could influence the accuracy of nurses' perceptions of their patient's quality of life.

Economic evaluation of the prophylaxis for thromboembolism in critical care trial (E-PROTECT): study protocol for a randomized controlled trial

Background

Venous thromboembolism (VTE) is a common complication of critical illness with important clinical consequences. The Prophylaxis for ThromboEmbolism in Critical Care Trial (PROTECT) is a multicenter, blinded, randomized controlled trial comparing the effectiveness of the two most common pharmocoprevention strategies, unfractionated heparin (UFH) and low molecular weight heparin (LMWH) dalteparin, in medical-surgical patients in the intensive care unit (ICU). E-PROTECT is a prospective and concurrent economic evaluation of the PROTECT trial.

Methods/Design

The primary objective of E-PROTECT is to identify and quantify the total (direct and indirect, variable and fixed) costs associated with the management of critically ill patients participating in the PROTECT trial, and, to combine costs and outcome results to determine the incremental cost-effectiveness of LMWH versus UFH, from the acute healthcare system perspective, over a data-rich time horizon of ICU admission and hospital admission. We derive baseline characteristics and probabilities of in-ICU and in-hospital events from all enrolled patients. Total costs are derived from centers, proportional to the numbers of patients enrolled in each country. Direct costs include medication, physician and other personnel costs, diagnostic radiology and laboratory testing, operative and non-operative procedures, costs associated with bleeding, transfusions and treatment-related complications. Indirect costs include ICU and hospital ward overhead costs. Outcomes are the ratio of incremental costs per incremental effects of LMWH versus UFH during hospitalization; incremental cost to prevent a thrombosis at any site (primary outcome); incremental cost to prevent a pulmonary embolism, deep vein thrombosis, major bleeding event or episode of heparin-induced thrombocytopenia (secondary outcomes) and incremental cost per life-year gained (tertiary outcome). Pre-specified subgroups and sensitivity analyses will be performed and confidence intervals for the estimates of incremental cost-effectiveness will be obtained using bootstrapping.

Discussion

This economic evaluation employs a prospective costing methodology concurrent with a randomized controlled blinded clinical trial, with a pre-specified analytic plan, outcome measures, subgroup and sensitivity analyses. This economic evaluation has received only peer-reviewed funding and funders will not play a role in the generation, analysis or decision to submit the manuscripts for publication.

Trial registration

Clinicaltrials.gov Identifier: NCT00182143. Date of registration: 10 September 2005.

Electronic supplementary material

The online version of this article (doi:10.1186/1745-6215-15-502) contains supplementary material, which is available to authorized users.

Home treatment in paediatric patients with Hunter syndrome: the first Italian experience

Hunter syndrome (mucopolysaccharidosis type II [MPS II], OMIM309900) is a rare X-linked lysosomal storage disorder caused by the deficiency of the enzyme iduronate-2-sulphatase, resulting in accumulation of glycosaminoglycans, progressive multisystem organ failure, and early death. Enzyme replacement therapy (ERT) with weekly intravenous infusions of idursulfase, a treatment for MPS II and commercially available since 2007, has been shown to improve certain symptoms and signs of the disease. The efficacy and safety data of this enzyme preparation have been widely reported and, after a change to the idursulfase Summary of Product Characteristics in March 2010, home ERT by infusion is now an option for selected patients. Previously reported experiences of home therapy in MPS II have shown increased treatment compliance and an improvement in quality of life for both patients and families. We report the results of the home therapy experience of 3 paediatric patients with MPS II in southern Italy. This pilot experience with home infusion is the first reported from Italy.

Incidence, life expectancy and prognostic factors in cancer patients under prolonged mechanical ventilation: a nationwide analysis of 5,138 cases during 1998-2007

INTRODUCTION

This study is aimed at determining the incidence, survival rate, life expectancy, quality-adjusted life expectancy (QALE) and prognostic factors in patients with cancer in different organ systems undergoing prolonged mechanical ventilation (PMV).

METHODS

We used data from the National Health Insurance Research Database of Taiwan from 1998 to 2007 and linked it with the National Mortality Registry to ascertain mortality. Subjects who received PMV, defined as having undergone mechanical ventilation continuously for longer than 21 days, were enrolled. The incidence of cancer patients requiring PMV was calculated, with the exception of patients with multiple cancers. The life expectancies and QALE of patients with different types of cancer were estimated. Quality-of-life data were taken from a sample of 142 patients who received PMV. A multivariable proportional hazards model was constructed to assess the effect of different prognostic factors, including age, gender, type of cancer, metastasis, comorbidities and hospital levels.

RESULTS

Among 9,011 cancer patients receiving mechanical ventilation for more than 7 days, 5,138 undergoing PMV had a median survival of 1.37 months (interquartile range [IQR], 0.50 to 4.57) and a 1-yr survival rate of 14.3% (95% confidence interval [CI], 13.3% to 15.3%). The incidence of PMV was 10.4 per 100 ICU admissions. Head and neck cancer patients seemed to survive the longest. The overall life expectancy was 1.21 years, with estimated QALE ranging from 0.17 to 0.37 quality-adjusted life years for patients with poor and partial cognition, respectively. Cancer of liver (hazard ratio [HR], 1.55; 95% CI, 1.34 to 1.78), lung (HR, 1.45; 95% CI, 1.30 to 1.41) and metastasis (HR, 1.53; 95% CI, 1.42 to 1.65) were found to predict shorter survival independently.

CONCLUSIONS

Cancer patients requiring PMV had poor long-term outcomes. Palliative care should be considered early in these patients, especially when metastasis has occurred.

Cost per QALY (quality-adjusted life year) and lifetime cost of prolonged mechanical ventilation in Taiwan

INTRODUCTION

Patients who require prolonged mechanical ventilation (PMV) are increasing and producing financial burdens worldwide. This study determines the cost per QALY (quality-adjusted life year), out-of-pocket expenses, and lifetime costs for PMV patients stratified by underlying diseases and cognition levels.

METHODS

A nationwide sample of 50,481 patients with continual mechanical ventilation for more than 21 days was collected during 1997-2007. After stratifying the patients according to specific diagnoses, a latent class analysis (LCA) was performed to categorise PMV patients with multiple co-morbidities into several homogeneous groups. The survival functions were estimated for individual groups using the Kaplan-Meier method and extrapolated to 300 months through a semi-parametric method. The survival functions were adjusted using an EQ-5D utility value derived from a convenience sample of 142 PMV patients to estimate quality-adjusted life expectancies (QALE). Another convenience sample of 165 patients was used to estimate the out-of-pocket expenses. The lifetime expenditures paid by the single-payer National Health Insurance (NHI) system and patients' families were estimated by multiplying average monthly expenditures by the survival probabilities and summing the values over lifetime.

RESULTS

PMV therapy costs more than 100,000 U.S. dollars (USD) per QALY for all patients with poor cognition. For patients with partial cognition, PMV therapy costs less than 56,000 USD per QALY for those with liver cirrhosis, intracranial or spinal cord injuries, and 57,000-69,000 USD for patients with multiple co-morbidities under age of 65. The average lifetime cost of PMV was usually below 56,000 USD. The out-of-pocket expenses were often more than one-third of the total cost of treatment.

CONCLUSIONS

PMV treatment for patients with poor cognition would cost more than 5 times Taiwan's GDP (gross domestic products), or less cost-effective. The out-of-pocket expenses for PMV provision should also be considered in policy decision.

Outcomes of prolonged mechanic ventilation: a discrimination model based on longitudinal health insurance and death certificate data

BACKGROUND

This study investigated prognosis among patients under prolonged mechanical ventilation (PMV) through exploring the following issues: (1) post-PMV survival rates, (2) factors associated with survival after PMV, and (3) the number of days alive free of hospital stays requiring mechanical ventilation (MV) care after PMV.

METHODS

This is a retrospective cohort study based on secondary analysis of prospectively collected data in the national health insurance system and governmental data on death registry in Taiwan. It used data for a nationally representative sample of 25,482 patients becoming under PMV (> = 21 days) during 1998-2003. We calculated survival rates for the 4 years after PMV, and adopted logistic regression to construct prediction models for 3-month, 6-month, 1-year, and 2-year survival, with data of 1998-2002 for model estimation and the 2003 data for examination of model performance. We estimated the number of days alive free of hospital stays requiring MV care in the immediate 4-year period after PMV, and contrasted patients who had low survival probability with all PMV patients.

RESULTS

Among these patients, the 3-month survival rate was 51.4%, and the 1-year survival rate was 31.9%. Common health conditions with significant associations with poor survival included neoplasm, acute and unspecific renal failure, chronic renal failure, non-alcoholic liver disease, shock and septicaemia (odd ratio < 0.7, p < 0.05). During a 4-year follow-up period for patients of year 2003, the mean number of days free of hospital stays requiring MV was 66.0 in those with a predicted 6-month survival rate < 10%, and 111.3 in those with a predicted 2-year survival rate < 10%. In contrast, the mean number of days was 256.9 in the whole sample of patients in 2003.

CONCLUSIONS

Neoplasm, acute and unspecific renal failure, shock, chronic renal failure, septicemia, and non-alcoholic liver disease are significantly associated with lower survival among PMV patients. Patients with anticipated death in a near future tend to spend most of the rest of their life staying in hospital using MV services. This calls for further research into assessing PMV care need among patients at different prognosis stages of diseases listed above.

Screening and prevention of venous thromboembolism in critically ill patients: a decision analysis and economic evaluation

RATIONALE

Venous thromboembolism is difficult to diagnose in critically ill patients and may increase morbidity and mortality.

OBJECTIVES

To evaluate the cost-effectiveness of strategies to reduce morbidity from venous thromboembolism in critically ill patients.

METHODS

A Markov decision analytic model to compare weekly compression ultrasound screening (screening) plus investigation for clinically suspected deep vein thrombosis (DVT) (case finding) versus case finding alone; and a hypothetical program to increase adherence to DVT prevention. Probabilities were derived from a systematic review of venous thromboembolism in medical-surgical intensive care unit patients. Costs (in 2010 $US) were obtained from hospitals in Canada, Australia, and the United States, and the medical literature. Analyses were conducted from a societal perspective over a lifetime horizon. Outcomes included costs, quality-adjusted life-years (QALY), and incremental cost-effectiveness ratios.

MEASUREMENTS AND MAIN RESULTS

In the base case, the rate of proximal DVT was 85 per 1,000 patients. Screening resulted in three fewer pulmonary emboli than case-finding alone but also two additional bleeding episodes, and cost $223,801 per QALY gained. In sensitivity analyses, screening cost less than $50,000 per QALY only if the probability of proximal DVT increased from a baseline of 8.5-16%. By comparison, increasing adherence to appropriate pharmacologic thromboprophylaxis by 10% resulted in 16 fewer DVTs, one fewer pulmonary emboli, and one additional heparin-induced thrombocytopenia and bleeding event, and cost $27,953 per QALY gained. Programs achieving increased adherence to best-practice venous thromboembolism prevention were cost-effective over a wide range of program costs and were robust in probabilistic sensitivity analyses.

CONCLUSIONS

Appropriate prophylaxis provides better value in terms of costs and health gains than routine screening for DVT. Resources should be targeted at optimizing thromboprophylaxis.

Life expectancies and incidence rates of patients under prolonged mechanical ventilation: a population-based study during 1998 to 2007 in Taiwan

Introduction

The present study examined the median survival, life expectancies, and cumulative incidence rate (CIR) of patients undergoing prolonged mechanical ventilation (PMV) stratified by different underlying diseases.

Methods

According to the National Health Insurance Research Database of Taiwan, there were 8,906,406 individuals who obtained respiratory care during the period from 1997 to 2007. A random sample of this population was performed, and subjects who had continuously undergone mechanical ventilation for longer than 21 days were enrolled in the current study. Annual incidence rates and the CIR were calculated. After stratifying the patients according to their specific diagnoses, latent class analysis was performed to categorise PMV patients with multiple co-morbidities into several groups. The life expectancies of different groups were estimated using a semiparametric method with a hazard function based on the vital statistics of Taiwan.

Results

The analysis of 50,481 PMV patients revealed that incidence rates increased as patients grew older and that the CIR (17 to 85 years old) increased from 0.103 in 1998 to 0.183 in 2004 before stabilising thereafter. The life expectancies of PMV patients suffering from degenerative neurological diseases, stroke, or injuries tended to be longer than those with chronic renal failure or cancer. Patients with chronic obstructive pulmonary disease survived longer than did those co-morbid with other underlying diseases, especially septicaemia/shock.

Conclusions

PMV provides a direct means to treat respiratory tract diseases and to sustain respiration in individuals suffering from degenerative neurological diseases, and individuals with either of these types of conditions respond better to PMV than do those with other co-morbidities. Future research is required to determine the cost-effectiveness of this treatment paradigm.

Estimation of quality-adjusted life expectancy in patients under prolonged mechanical ventilation

OBJECTIVES

The purpose of this study was to estimate the quality-adjusted life expectancy (QALE) and the expected lifetime utility loss of patients with prolonged mechanical ventilation (PMV).

METHODS

PMV was defined as more than 21 days of mechanical ventilation. A total of 633 patients fulfilled this definition and were followed for 9 years (1998-2007) to obtain their survival status. Quality of life of 142 patients was measured with the EuroQol five-dimensional (EQ-5D) questionnaire during the period 2008 to 2009. The survival probabilities for each time point were adjusted with a utility measurement of quality of life and then extrapolated to 300 months to obtain the QALE. We compared the age-, gender-matched reference populations to calculate the expected lifetime utility loss.

RESULTS

The average age of subjects was 76 years old. The life expectancy and loss of life expectancy were 1.95 years and 8.48 years, respectively. The QALE of 55 patients with partial cognitive ability and the ability to respond was 0.58 quality-adjusted life years (QALY), whereas the QALEs of 87 patients with poor consciousness were 0.28 and 0.29 QALY for the EQ-5D measured by family caregivers and nurses, respectively. The loss of QALE for PMV patients was 9.87 to 10.17 QALY, corresponding to a health gap of 94% to 97%.

CONCLUSIONS

Theses results of poor prognosis would provide stakeholders evidence for communication to facilitate clinical decisions. The estimation may be used in future studies to facilitate the cost-effectiveness and reduction of the health gap.