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1.
Public Health ; 143: 60-70, 2017 Feb.
Article in English | MEDLINE | ID: mdl-28159028

ABSTRACT

OBJECTIVES: The 2014-15 outbreak in West Africa was the largest and deadliest Ebola outbreak recorded; however, there remains uncertainty over its wider health consequences. Our objective was to provide a comprehensive overview of the impact of the Ebola outbreak on population health in the three most affected countries: Sierra Leone, Liberia and Guinea. STUDY DESIGN: Narrative review. METHODS: A narrative overview of the peer-reviewed and grey literature related to the impact and consequences of the Ebola outbreak was conducted, synthesizing the findings of literature retrieved from a structured search of biomedical databases, the Web and references of reviewed articles. RESULTS: The impact of the Ebola outbreak was profound and multifaceted. The health system was severely compromised due to overwhelming demand, healthcare workers deaths, resource diversion and closure of health facilities. Fear of Ebola and healthcare workers led to a breakdown in trust in health systems. Access to healthcare was compromised. Substantial reductions in healthcare utilization were reported including over 80% reductions in maternal delivery care in Ebola-affected areas, 40% national reductions in malaria admissions among children <5 years and substantial reductions in vaccination coverage. Socio-economic impacts included reduced community cohesion, education loss, reduced child protection, widespread job losses and food insecurity. Increased morbidity and mortality and reduced expected life expectancy were reported. CONCLUSIONS: This review highlights the scope and scale of the consequences of the Ebola outbreak on population health. Sustained commitment of the international community is required to support health system re-building and to urgently address unmet population health needs.


Subject(s)
Disease Outbreaks , Hemorrhagic Fever, Ebola/epidemiology , Public Health , Africa, Western/epidemiology , Attitude to Health , Delivery of Health Care/organization & administration , Health Services Accessibility/statistics & numerical data , Humans , Patient Acceptance of Health Care/statistics & numerical data , Social Determinants of Health , Socioeconomic Factors , Trust
2.
Eye (Lond) ; 31(3): 353-363, 2017 Mar.
Article in English | MEDLINE | ID: mdl-28234351

ABSTRACT

PurposeThe purpose of the study was to audit the use of non-contact ultra-widefield retinal imaging in infants with suspected abusive head trauma (AHT) using the Optos P200MA Scanning Laser Ophthalmoscope.Patients and methodsA retrospective, observational case series. Ten eyes of five consecutive infants (aged 1-15 months) with suspected (or in 1 case, known) AHT referred for an ophthalmological opinion were included. Each infant underwent non-contact ultra-widefield retinal imaging using the Optos P200MA scanning laser ophthalmoscope. Optos fundus fluorescein angiography (FFA) was performed in one infant with oral sedation. The other four infants did not require sedation. The main outcome measure was the acquisition of a single, definitive ultra-widefield retinal image in each eye. Safety was audited by determining adverse changes in heart rate and oxygen saturations that required cessation of imaging.ResultsThe Optos P200MA ultra-widefield scanning laser ophthalmoscope acquired good quality retinal images in all infants. Documentation of acute, widespread retinal haemorrhages contributed to a diagnosis of AHT in three infants. Chronic pre-macular haemorrhage and macular schisis were documented by FFA in a fourth infant. The absence of retinal haemorrhages was documented in a fifth infant contributing to the exclusion of a diagnosis of AHT. There were no adverse safety signals in any infant in this series.ConclusionThe Optos P200MA ultra-widefield scanning laser ophthalmoscope appears safe to use in infants with suspected AHT, providing high-quality retinal images in a single frame without ocular contact. Optos P200MA may be used as alternative to RetCam to document retinal haemorrhages in stable infants with suspected AHT.


Subject(s)
Child Abuse/diagnosis , Craniocerebral Trauma/diagnosis , Ophthalmoscopy/methods , Retina/diagnostic imaging , Retinal Hemorrhage/diagnostic imaging , Clinical Audit , Craniocerebral Trauma/etiology , Female , Fluorescein Angiography , Humans , Infant , Male , Ophthalmoscopes , Retinal Hemorrhage/etiology , Retrospective Studies
5.
Public Health Action ; 3(4): 299-303, 2013 Dec 21.
Article in English | MEDLINE | ID: mdl-26393050

ABSTRACT

SETTING: A regional hospital in rural Swaziland. OBJECTIVES: To evaluate a hospital-based contact screening programme and test approaches to improve its effectiveness. DESIGN: An evaluation and quality improvement study of tuberculosis (TB) contact tracing services. RESULTS: Hospital-based TB contact tracing led to screening of 157 (24%) of 658 contacts; of these, 4 (2.5%) were diagnosed with TB. Of 68 contacts eligible for human immunodeficiency virus (HIV) testing and counselling, 45 (66%) were tested and 7/45 (16%) were identified as HIV-positive. Twelve (50%) of 24 screened contacts aged <5 years were provided isoniazid prophylaxis. Three enhanced models of TB contact tracing were piloted to screen contacts in the community. Although some enhanced models screened large numbers of contacts, no contacts were diagnosed with TB. CONCLUSION: Contact tracing of household members conducted in TB clinics within hospital settings is effective in high-burden, low-income settings, and can be provided using current resources. Enhanced household contact tracing models that followed up contacts in the community were not found to be effective. Additional resources would be required to provide household TB contact tracing in the community.

6.
Clin Otolaryngol ; 37(5): 342-54, 2012 Oct.
Article in English | MEDLINE | ID: mdl-22928754

ABSTRACT

BACKGROUND: In the UK, approximately 10 000 people have cochlear implants, more than 99% with a unilateral implant. Evidence shows that adults implanted bilaterally may benefit from binaural advantages; however, systematic review evidence is limited. OBJECTIVES OF THE REVIEW: To conduct a systematic review to discover the evidence for effectiveness and cost-effectiveness of using bilateral cochlear implants in adults with severe-to-profound hearing loss by comparing their effectiveness with unilateral cochlear implantation or unilateral cochlear implantation and acoustic hearing aid in the contralateral ear. TYPE OF REVIEW: Systematic review. SEARCH STRATEGY: This examined 16 electronic databases, plus bibliographies and references for published and unpublished studies. EVALUATION METHOD: Abstracts were independently assessed against inclusion criteria by two researchers, and disagreements were resolved. Selected papers were then retrieved and further independently assessed in a similar way. Included studies had their data extracted by one reviewer and checked by another. RESULTS: Searches yielded 2892 abstracts producing 19 includable studies. Heterogeneity between studies precluded meta-analysis. However, all studies reported that bilateral cochlear implants improved hearing and speech perception: one randomised controlled trial found a significant binaural benefit over the first ear alone for speech and noise from the front (12.6 ± 5.4%, P < 0.001) and when noise was ipsilateral to the first ear (21 ± 6%, P < 0.001); and another found a significant benefit for spatial hearing at 3 and 9 months post-implantation compared with pre-implantation [mean difference (sd) scores: 3 months = 1.46 (0.83-2.09), P < 0.01].Quality of life results varied, showing bilateral implantation may improve quality of life in the absence of worsening tinnitus. Limited cost-effectiveness evidence showed that bilateral implantation is probably only cost-effective at a willingness-to-pay threshold above £62 000 per quality adjusted life year. CONCLUSIONS: Despite inconsistency in the quality of available evidence, the robustness of systematic review methods gives weight to the positive findings of included studies demonstrating that bilateral implantation is clinically effective in adults but unlikely to be cost-effective.


Subject(s)
Cochlear Implants/economics , Deafness/economics , Deafness/rehabilitation , Adult , Cost-Benefit Analysis , Humans , United Kingdom
7.
Epidemiol Infect ; 140(7): 1252-66, 2012 Jul.
Article in English | MEDLINE | ID: mdl-22040368

ABSTRACT

Introduction of pneumococcal polysaccharide (PPV23) and conjugate vaccine (PCV7) programmes were expected to change the epidemiology of invasive pneumococcal disease (IPD) and pneumonia in the UK. We describe the epidemiology of IPD and hospitalization with pneumonia using high-quality surveillance data over an 8-year period, 2002-2009. Although PPV23 uptake increased from 49% to 70% and PCV7 uptake reached 98% by 2009, the overall incidence of IPD increased from 11.8/100 000 to 16.4/100 000 (P=0.13), and the incidence of hospitalization with pneumonia increased from 143/100 000 to 207/100 000 (P<0.001). Although a reduction in the proportion of IPD caused by PCV7 serotypes was observed, concurrent increases in PPV23 and non-vaccine serotype IPD contributed to an increased IPD burden overall. Marked inequalities in the geographical distribution of disease were observed. Existing vaccination programmes have, so far, not been sufficient to address an increasing burden of pneumococcal disease in our locality.


Subject(s)
Pneumococcal Infections/epidemiology , Pneumococcal Infections/prevention & control , Pneumococcal Vaccines/administration & dosage , Pneumococcal Vaccines/immunology , Vaccination/statistics & numerical data , Adolescent , Adult , Aged , Aged, 80 and over , Child , Child, Preschool , Female , Heptavalent Pneumococcal Conjugate Vaccine , Hospitalization/statistics & numerical data , Humans , Incidence , Infant , Infant, Newborn , Male , Middle Aged , Topography, Medical , United Kingdom/epidemiology , Young Adult
8.
Clin Otolaryngol ; 35(2): 87-96, 2010 Apr.
Article in English | MEDLINE | ID: mdl-20500577

ABSTRACT

OBJECTIVE: In the UK approximately 3% of over 50 years olds and 8% of over 70 year olds have severe (794-94 dBHL) to deafness. As deafness increased, hearing aids become increasingly ineffective. Cochelear implants can provide an alternative treatment. OBJECTIVE OF REVIEW: To bring together the research evidence through the robustness of a systematic review of the effectiveness of unilateral cochlear implants for adults. We also sought to systematically review the published literature on cost-effectiveness. TYPES OF REVIEW: Systematic review. SEARCH STRATEGY: This examined 16 electronic databases, plus bibliographies and references for published and unpublished studies from inception to june 2009. EVALUATION METHOD: Abstracts were independently assessed against inclusion criteria by two researchers were compared and disagreements resolved. Included papers were then retrieved and further independently assessed in a similar way. Remaining studies had their data independently extracted by one of five reviewers and checked by another reviewer. RESULTS: From 1,580 titles and abstracts nine studies were included. These were of variable quality; some study's results should be viewed with caution. The studies were too hetrogeneous to pool the data. However, overall the results firmly supported the use of unilateral cochler implants for severe to profoundly deaf adults. Additionally, four UK based economic evaluations found unilateral cochlear implants to be cost-effectivene in adults at UK implants centres. CONCLUSION: The methodologically weak but universally positive body of effectiveness evidence supports the use of unilateral cochlear implants in adults. Previous economic evaluations indicate that such implants are likely to be cost-effective.


Subject(s)
Cochlear Implants/economics , Hearing Loss, Unilateral/economics , Hearing Loss, Unilateral/surgery , Adult , Cochlear Implantation/economics , Cochlear Implantation/instrumentation , Cost-Benefit Analysis , Deafness/surgery , Humans , Prosthesis Design , Treatment Outcome
10.
Health Technol Assess ; 13(44): 1-330, 2009 Sep.
Article in English | MEDLINE | ID: mdl-19799825

ABSTRACT

OBJECTIVES: To investigate whether it is clinically effective and cost-effective to provide (i) a unilateral cochlear implant for severely to profoundly deaf people (using or not using hearing aids), and (ii) a bilateral cochlear implant for severely to profoundly deaf people with a single cochlear implant (unilateral or unilateral plus hearing aid). DATA SOURCES: Main electronic databases [MEDLINE; EMBASE; Cochrane Database of Systematic Reviews; CENTRAL; NHS EED; DARE; HTA (NHS-CRD); EconLit; National Research Register; and ClinicalTrials.gov] searched in October 2006, updated July 2007. REVIEW METHODS: A systematic review of the literature was undertaken according to standard methods. A state-transition (Markov) model of the main care pathways deaf people might follow and the main complications and device failures was developed. RESULTS: The clinical effectiveness review included 33 papers, of which only two were RCTs. They used 62 different outcome measures and overall were of moderate to poor quality. All studies in children comparing one cochlear implant with non-technological support or an acoustic hearing aid reported gains on all outcome measures, some demonstrating greater gain from earlier implantation. The strongest evidence for an advantage from bilateral over unilateral implantation was for understanding speech in noisy conditions (mean improvement 13.2%, p < 0.0001); those receiving their second implant earlier made greater gains. Comparison of bilateral with unilateral cochlear implants plus an acoustic hearing aid was compromised by small sample sizes and poor reporting, but benefits were seen with bilateral implants. Cochlear implants improved children's quality of life, and those who were implanted before attending school were more likely to do well academically and attend mainstream education than those implanted later. In adults, there was a greater benefit from cochlear implants than from non-technological support in terms of speech perception. Increased age at implantation may reduce effectiveness and there is a negative correlation between duration of deafness and effectiveness. Speech perception measures all showed benefits for cochlear implants over acoustic hearing aids [e.g. mean increase in score of 37 points in noisy conditions (p < 0.001) with BKB sentences]; however, prelingually deafened adults benefited less than those postlingually deafened (mean change scores 20% versus 62%). For unilateral versus bilateral implantation, benefits in speech perception were significant in noisy conditions on all measures [e.g. 76% for HINT sentences (p < 0.0001)]. Quality of life measured with generic and disease-specific instruments or by interview mostly showed significant gains or positive trends from using cochlear implants. The Markov model base-case analysis estimated that, for prelingually profoundly deaf children, the incremental cost-effectiveness ratio (ICER) for unilateral implantation compared with no implantation was 13,413 pounds per quality-adjusted life-year (QALY). Assuming the utility gain for bilateral implantation is the same for adults and children, the ICERs for simultaneous and sequential bilateral implantation versus unilateral implantation were 40,410 pounds and 54,098 pounds per QALY respectively. For postlingually sensorineurally profoundly deaf adults, the corresponding ICERs were 14,163 pounds, 49,559 pounds and 60,301 pounds per QALY respectively. Probabilistic threshold analyses suggest that unilateral implants are highly likely to be cost-effective for adults and children at willingness to pay thresholds of 20,000 pounds or 30,000 pounds per QALY. There are likely to be overall additional benefits from bilateral implantation, enabling children and adults to hold conversations more easily in social situations. CONCLUSIONS: Unilateral cochlear implantation is safe and effective for adults and children and likely to be cost-effective in profoundly deaf adults and profoundly and prelingually deaf children. However, decisions on the cost-effectiveness of bilateral cochlear implants should take into account the high degree of uncertainty within the model regarding the probable utility gain.


Subject(s)
Cochlear Implantation/economics , Cochlear Implantation/standards , Deafness/surgery , Models, Economic , Adolescent , Adult , Aged , Child , Child, Preschool , Cochlear Implantation/methods , Cost-Benefit Analysis , Female , Humans , Infant , Male , Middle Aged , United Kingdom , Young Adult
11.
J Hosp Infect ; 72(4): 307-13, 2009 Aug.
Article in English | MEDLINE | ID: mdl-19596493

ABSTRACT

The prevalence of community-associated meticillin-resistant Staphylococcus aureus (CA-MRSA) is increasing worldwide. Whilst CA-MRSA has been reported in the UK, there is little information concerning its clinical impact. Here we report three epidemic lineages of CA-MRSA occurring in East Yorkshire and describe their epidemiology, microbiology and clinical impact. Although CA-MRSA was most often associated with uncomplicated skin and soft tissue infections or asymptomatic colonisation, serious infection and fatalities were documented. Community-based transmission was noted in two separate households. We highlight limitations to existing definitions and propose debate to further define CA-MRSA and allow further study of its epidemiology and clinical impact in the UK.


Subject(s)
Community-Acquired Infections/epidemiology , Community-Acquired Infections/microbiology , Methicillin-Resistant Staphylococcus aureus/isolation & purification , Staphylococcal Infections/epidemiology , Staphylococcal Infections/microbiology , Adolescent , Adult , Aged , Aged, 80 and over , Bacterial Typing Techniques/methods , Child , Child, Preschool , Cluster Analysis , DNA Fingerprinting/methods , DNA, Bacterial/genetics , Electrophoresis, Gel, Pulsed-Field/methods , Female , Genotype , Humans , Infant , Infant, Newborn , Male , Methicillin-Resistant Staphylococcus aureus/classification , Methicillin-Resistant Staphylococcus aureus/genetics , Middle Aged , Molecular Epidemiology , United Kingdom/epidemiology , Young Adult
12.
J Infect ; 59(3): 149-55, 2009 Sep.
Article in English | MEDLINE | ID: mdl-19619897

ABSTRACT

Community-associated MRSA (CA-MRSA) strains have rapidly emerged worldwide as a cause of skin and soft tissue infections and occasionally severe disease. Although there have been relatively few reports from the UK, it is clear that the incidence of CA-MRSA infections is rising. Several distinct clonal CA-MRSA lineages have been identified causing infections in individuals both in the community and in UK hospitals. Their prevalence is likely to be considerably higher than reported. In this review article we clarify the terminology and definitions used for CA-MRSA, detail their emergence, and summarise the available information regarding their current epidemiology and clinical impact in the UK. We discuss management and preventative strategies, highlight limitations in existing surveillance and the future challenges posed by CA-MRSA in the UK.


Subject(s)
Methicillin-Resistant Staphylococcus aureus , Staphylococcal Infections/epidemiology , Community-Acquired Infections/drug therapy , Community-Acquired Infections/epidemiology , Community-Acquired Infections/prevention & control , Humans , Methicillin-Resistant Staphylococcus aureus/pathogenicity , Staphylococcal Infections/drug therapy , Staphylococcal Infections/prevention & control , United Kingdom/epidemiology
13.
Clin Otolaryngol ; 34(3): 199-211, 2009 Jun.
Article in English | MEDLINE | ID: mdl-19531168

ABSTRACT

BACKGROUND: Annually an estimated 223 children in the UK are born with or acquire permanent profound bilateral deafness (PBHL >or= 95 dB). These children may gain little or no benefit from acoustic hearing aids. However, cochlear implants might enable them to hear. OBJECTIVES OF THE REVIEW: To bring together the diverse research in this area under the rigor of a systematic review to discover the strength of evidence when comparing the effectiveness of unilateral cochlear implants with non-technological support or acoustic hearing aids in children with PBHL. TYPE OF REVIEW: Systematic review. SEARCH STRATEGY: This examined 16 electronic data bases, plus bibliographies and references for published and unpublished studies. EVALUATION METHOD: Abstracts were independently assessed against inclusion criteria by two researchers, results were compared and disagreements resolved. Included papers were then retrieved and further independently assessed in a similar way. Remaining studies had their data independently extracted by one of five reviewers and checked by another reviewer. RESULTS: From 1,580 abstracts and titles 15 studies were included. These were of moderate to poor quality. The large amount of heterogeneity in design and outcomes precluded meta-analysis. However, all studies reported that unilateral cochlear implants improved scores on all outcome measures. Additionally five economic evaluations found unilateral cochlear implants to be cost-effective for profoundly deaf children at UK implant centres. CONCLUSIONS: The robustness of systematic review methods gives weight to the positive findings of 15 papers reporting on this subject that they individually lack; while an RCT to show this would be unethical.


Subject(s)
Cochlear Implantation/instrumentation , Deafness/rehabilitation , Child , Humans , Prosthesis Design , Quality of Life , Severity of Illness Index
14.
Int J STD AIDS ; 20(4): 221-4, 2009 Apr.
Article in English | MEDLINE | ID: mdl-19304962

ABSTRACT

Antiretroviral therapy (ART) inhibits HIV replication, allowing recovery of CD4+ T cell numbers and the restoration of immune function; its introduction has led to improved outcomes for individuals with HIV infection. However, it has been observed that some individuals responding to ART experience a clinical deterioration with symptoms and signs of an inflammatory illness. Immune reconstitution inflammatory syndrome (IRIS) results from pathological immune responses occurring during immune reconstitution. IRIS is best considered a group of disorders with a wide range of clinical manifestations, incorporating disease resulting from pathological inflammation to pathogens, immune-mediated inflammatory disease and autoimmune disease. Clinical effects range from a mild, self-limiting illness to severe morbidity and mortality. Clinicians working in the field of HIV medicine can expect to encounter individuals with IRIS. In this review, we discuss definitions, describe clinical presentations, summarize research relating to pathogenesis and identify risk factors, preventive and management strategies.


Subject(s)
Anti-HIV Agents/therapeutic use , HIV Infections/drug therapy , Immune Reconstitution Inflammatory Syndrome/diagnosis , Immune Reconstitution Inflammatory Syndrome/immunology , Autoimmune Diseases/diagnosis , Autoimmune Diseases/immunology , HIV Infections/immunology , Humans , Immune Reconstitution Inflammatory Syndrome/epidemiology , Immune Reconstitution Inflammatory Syndrome/prevention & control , Incidence , Mycobacterium Infections/complications , Mycobacterium Infections/immunology , Mycoses/complications , Mycoses/immunology , Risk Factors
15.
Health Technol Assess ; 13(6): iii-iv, ix-xii, 1-315, 2009 Jan.
Article in English | MEDLINE | ID: mdl-19195429

ABSTRACT

OBJECTIVES: To investigate the harmful health effects of taking ecstasy (3,4-methylenedioxymethamphetamine, MDMA) for recreational purposes. DATA SOURCES: MEDLINE, EMBASE, PsycINFO and Web of Knowledge were searched. Additional information on deaths was collected from the General Mortality Register (GMR) and the Special Mortality Register collated by the National Programme on Substance Abuse Deaths (np-SAD). REVIEW METHODS: Studies were categorised according to design, with systematic research syntheses (Level I evidence) the most valid and least open to bias. Where Level I evidence was not available, controlled observational studies (Level II evidence) were systematically reviewed. If neither Level I nor Level II evidence was available, uncontrolled case series and case reports (Level III evidence) were systematically surveyed. Data were extracted by one reviewer and a sample checked by a second. The heterogeneity of Level II evidence was addressed by undertaking stratified analyses for current and former ecstasy users and comparing them either with control groups using other illegal drugs but not ecstasy (polydrug controls) or with controls naïve to illegal drugs (drug-naïve controls). Statistical heterogeneity was minimised by using a random-effects model throughout and investigated using study-level regression analysis (metaregression). RESULTS: Five Level I syntheses were identified; for each it was difficult to ascertain the exact methods adopted and evidence included. Small but significant deficits for ecstasy users compared to controls were reported in areas relating to attention, memory, psychomotor speed, executive systems functioning, and self-reported depressive symptoms. Data from Level II studies were directly pooled for seven individual outcomes, suggesting that ecstasy users performed worse than controls on common measures of immediate and delayed verbal recall (RAVLT, RBMT, digit span). No difference was seen in IQ (NART). The 915 outcome measures identified in Level II studies were analysed in broad domains: immediate and delayed verbal and visual memory, working memory, two measures of attention, three measures of executive function, perceptual organisation, self-rated depression, memory and anxiety, and impulsivity measured objectively and subjectively. Ecstasy users performed significantly worse than polydrug controls in 13/16 domains and significantly worse than drug-naïve controls in 7/12 domains for which sufficient data were available. The largest, most consistent exposure effects were seen in meta-analyses of memory (especially verbal and working memory, with less marked effects seen in visual memory). Former ecstasy users frequently showed deficits that matched or exceeded those seen amongst current users. At aggregate level, the effects do not appear to be dose-related, but are variably confounded by other drug use, particularly alcohol. Of Level III evidence, in the 10 years to 2006, the np-SAD and the GMR recorded an average of around 50 drug-related deaths per year involving ecstasy; it was the sole drug implicated in around 10 cases per year. Retrospective case series, based on hospital emergency department records, reported a death rate of 0-2% from emergency admissions related to ecstasy. Two major syndromes are most commonly reported as the immediate cause of death in fatal cases: hyperthermia and hyponatraemia. CONCLUSIONS: A broad range of relatively low-quality literature suggests that recreational use of ecstasy is associated with significant deficits in neurocognitive function (particularly immediate and delayed verbal memory) and increased psychopathological symptoms. The clinical significance of the exposure effect in individual cases will be variable but, on average, deficits are likely to be relatively small. Ecstasy is associated with a range of acute harms but appears to be a rare cause of death in isolation.


Subject(s)
Amphetamine-Related Disorders/complications , Hallucinogens/pharmacology , Illicit Drugs/pharmacology , Mental Disorders/chemically induced , N-Methyl-3,4-methylenedioxyamphetamine/pharmacology , Cognition/drug effects , Databases, Bibliographic , Hallucinogens/toxicity , Humans , Illicit Drugs/toxicity , Memory Disorders/chemically induced , Mental Disorders/physiopathology , Mental Recall/drug effects , N-Methyl-3,4-methylenedioxyamphetamine/toxicity , Observation , Recreation
16.
Health Technol Assess ; 13(8): iii, ix-xi, 1-50, 2009 Jan.
Article in English | MEDLINE | ID: mdl-19203465

ABSTRACT

OBJECTIVES: To explore the use of surrogate outcomes in Health Technology Assessment (HTA) and provide a basis for guidance for their future use, validation and reporting. This report focuses on the role of surrogate outcomes in cost-effectiveness models (CEMs) within UK HTA Programme reports. DATA SOURCES: Reports published in the UK HTA Programme monograph series in 2005 and 2006 formed the sampling frame for this study. REVIEW METHODS: Reports were selected on the basis that they addressed a treatment effectiveness/efficacy question, that they included a CEM and that the CEM was primarily based on a surrogate outcome. Reports addressing diagnostic, screening, aetiology, prognostic and methodological questions were excluded. Information was extracted from included reports by two reviewers using a standardised proforma. Surrogate outcomes were assessed according to two published validation frameworks [Journal of the American Medical Association (JAMA) criteria and Outcomes Measures in Rheumatology Clinical Trials (OMERACT) scoring schema]. A narrative synthesis of findings is presented in the form of tabular summaries and illustrative qualitative quotations. RESULTS: A total of 35 UK HTA reports published in 2005 and 2006 addressed an effectiveness/efficacy question and contained a CEM. Of these, four were found to have based their CEM on a surrogate outcome. All four reports sourced treatment-related changes in surrogate outcomes through a systematic review of the literature; however, there was some variability in the consistency and transparency by which these reports provided evidence of the validation for the surrogate-final outcome relationship. Only one of the reports undertook a systematic review to specifically seek the evidence base for the association between surrogate and final outcomes. Furthermore, this was the only report to provide level 1 surrogate-final outcome validation evidence, i.e. RCT data showing a strong association between the change in surrogate outcome (BPAR) and the change in final outcome (graft survival) at an individual patient level. This report met the JAMA criteria for acceptable evidence of a surrogate. Two reports provided level 2 evidence, i.e. observational study data showing the relationship between the surrogate and final outcome, and one report provided level 3 evidence, i.e. a review of disease natural history. None of the four reports achieved a sufficient score on the OMERACT schema to be judged to have acceptable evidence of a surrogate outcome by its authors. CONCLUSIONS: In this survey of UK HTA reports about 10% of the CEMs therein were explicitly based on surrogate outcomes. The strength of evidence for the surrogate-final outcome relationship, transparency of quantification and exploration of uncertainty of this relationship were found to vary considerably. Recommendations are made for the use of surrogate outcomes in future HTA reports.


Subject(s)
Biomarkers , Cost-Benefit Analysis , Outcome Assessment, Health Care/methods , Technology Assessment, Biomedical/methods , Data Interpretation, Statistical , Evidence-Based Medicine , Health Policy , Humans , Outcome Assessment, Health Care/economics , Proportional Hazards Models , Quality-Adjusted Life Years , Reproducibility of Results , Technology Assessment, Biomedical/economics
18.
Am J Ophthalmol ; 135(2): 249-51, 2003 Feb.
Article in English | MEDLINE | ID: mdl-12566042

ABSTRACT

PURPOSE: To describe a case of ocular tilt reaction caused by vasculitic lesions in the midbrain in a child with polyarteritis nodosa. DESIGN: Observational case report. METHODS: A 5-year-old girl with a chronic illness developed diplopia associated with a left head tilt, right hypertropia, torsional nystagmus, slowed vertical saccades and poor convergence. Fundoscopic examination demonstrated conjugate leftward torsion of the eyes consistent with a sustained ocular tilt reaction.Renal angiography confirmed polyarteritis nodosa and cerebral magnetic resonance imaging demonstrated mesencephalic pathology. CONCLUSIONS: Polyarteritis nodosa is a difficult condition to diagnose in a child and can cause brainstem lesions. This rare case of ocular tilt reaction of midbrain origin highlights that a sustained head tilt in a child can be due to brainstem pathology, rather than a fourth nerve palsy.


Subject(s)
Brain Diseases/etiology , Diplopia/etiology , Nystagmus, Pathologic/etiology , Polyarteritis Nodosa/complications , Strabismus/etiology , Tegmentum Mesencephali/pathology , Aspirin/therapeutic use , Brain Diseases/diagnosis , Brain Diseases/drug therapy , Child, Preschool , Cyclophosphamide/therapeutic use , Diplopia/drug therapy , Drug Therapy, Combination , Female , Head Movements , Humans , Kidney Diseases/diagnostic imaging , Kidney Diseases/drug therapy , Magnetic Resonance Imaging , Nystagmus, Pathologic/drug therapy , Polyarteritis Nodosa/drug therapy , Prednisolone/therapeutic use , Radiography , Ranitidine/therapeutic use , Saccades , Strabismus/drug therapy , Tegmentum Mesencephali/drug effects
19.
Public Health ; 116(4): 207-13, 2002 Jul.
Article in English | MEDLINE | ID: mdl-12087479

ABSTRACT

Health Improvement Programmes (HImPs) are at the heart of the UK government's partnership agenda for the National Health Service (NHS). This paper assesses the nature of HImP partnerships in England by analysing 50/99 first-round HImP strategies (randomly selected). The documentary analysis quantifies the structures and mechanisms of partnership, the degree of inter-sectoral participation and the extent of voluntary sector involvement.Three-quarters of responding health authorities (37/50) appear to have set up formal partnership structures to produce the HImP, or are planning to do so. After health authorities, local authorities (47/50) appear to be most involved in contributing to the HImP, particularly social services departments. Within the NHS 'family', acute and community trusts (43/50) appear to be the most involved, with Primary Care Groups (PCGs) contributing less (39/40). Community Health Councils (CHCs) appear to be similarly involved (40/50). The voluntary sector appear to be involved in all but four HImPs, mainly through umbrella organisations represented on strategic partnership boards (34/50). User and carer and community groups appear to participate far less. Lack of endorsement of HImPs by partner organisations, poor delineation of responsibilities and absence of transparency in resource allocation suggest that ownership of, and commitment to HImPs may be weak. HImPs appear to have focused on creating structures rather than developing aspects of partnership process. If levels of inter-sectoral involvement and voluntary sector participation are to be maintained or increased in future, Primary Care Trusts (PCTs) will need to develop a strategic approach to partnership.


Subject(s)
Community Participation , Health Promotion/organization & administration , State Medicine , Humans , Program Evaluation , United Kingdom
20.
J Paediatr Child Health ; 38(2): 129-34, 2002 Apr.
Article in English | MEDLINE | ID: mdl-12030992

ABSTRACT

OBJECTIVE: To assess the prevalence of sudden infant death syndrome (SIDS) risk factors in the Indigenous and non-Indigenous community of Townsville, a large remote urban centre in north Queensland, Australia. METHODS: Thirty Indigenous and 30 non-Indigenous women with young children were surveyed using sections of the West Australian Infancy and Pregnancy Survey 1997-1998. The prevalence of SIDS risk factors was compared between the two groups and medians and univariate associations were generated where appropriate. RESULTS: The Indigenous women were significantly younger and more likely to be single. The median age of the infants was 8 months (range 0.3-26 months) with no difference between the two groups. Thirty-seven per cent of Indigenous infants slept prone (cf. 17% of non-Indigenous infants; P = 0.03), and 77% shared a bed (cf. 13% of non-Indigenous infants; P < 0.001). The Indigenous households had significantly more members, with 57% including extended family members (cf. 20% non-Indigenous group; P = 0.003). Fifty-three per cent of the Indigenous women smoked during pregnancy (cf. 23% of non-Indigenous women; P = 0.017), 60% were smokers at the time of the interview, and smoking occurred inside 40% of Indigenous houses (cf. 20% and 20% for non-Indigenous women, respectively; P < 0.001, 0.09). CONCLUSION: This small survey suggests that the prevalence of SIDS risk factors is higher in the Indigenous population, and a new approach to education is needed urgently to promote SIDS awareness among Indigenous women.


Subject(s)
Infant Care/methods , Native Hawaiian or Other Pacific Islander/statistics & numerical data , Sudden Infant Death/ethnology , Adolescent , Adult , Australia , Data Collection , Demography , Female , Humans , Infant , Prevalence , Queensland/epidemiology , Risk Factors
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