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Swart N, Sinha AM, Bentley A, Smethurst H, Spencer G, Ceder S, Wilcox MH. A cost-utility analysis of two Clostridioides difficile infection guideline treatment pathways. Clin Microbiol Infect 2023; 29:1291-1297. [PMID: 37356620 DOI: 10.1016/j.cmi.2023.06.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 06/07/2023] [Accepted: 06/14/2023] [Indexed: 06/27/2023]
Abstract
OBJECTIVES Treatment guidelines are key drivers of prescribing practice in the management of Clostridioides difficile infection (CDI), but recommendations on best practice can vary. We conducted a cost-utility analysis to compare the treatment pathway recommended by the European Society of Clinical Microbiology and Infectious Diseases (ESCMID) guideline with the pathway proposed by the National Institute for Health and Care Excellence (NICE) guideline, from the perspective of the UK National Health Service. METHODS A decision tree modelling approach was adopted to reflect the treatment pathway for CDI as outlined in ESCMID and NICE guidelines. Patients experiencing a CDI infection received up to three treatments per infection to achieve a response and could subsequently experience up to two recurrences. Data on patient demographics, treatment response, recurrence, utilities, CDI-related mortality, and costs were taken from published literature. RESULTS The ESCMID treatment pathway was cost-effective versus the NICE treatment pathway at a threshold of £20 000 per quality-adjusted life year gained, with an incremental cost-effectiveness ratio of £4931. Cost-effectiveness was driven by differences in index infection recommendations (ESCMID recommends fidaxomicin as first-line treatment whereas NICE recommends vancomycin). The model results were robust to variations in inputs investigated in scenarios and sensitivity analyses, and probabilistic sensitivity analysis demonstrated that the ESCMID guideline treatment strategy had a 100% likelihood of being cost-effective versus the NICE treatment strategy. DISCUSSION Compared with the NICE guideline, the ESCMID guideline recommendations for treating an index CDI represent the most cost-effective use of healthcare resources from the perspective of the UK National Health Service.
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Affiliation(s)
| | | | | | | | | | | | - Mark H Wilcox
- Department of Microbiology, Leeds Teaching Hospitals NHS Trust, Leeds Institute of Medical Research, University of Leeds, Leeds, United Kingdom.
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Spencer G, Smeltzer M, Faris N, Fehnel C, Houston-Harris C, Ray M, Finch-Cruz C, Berry A, Gianpapa C, Hilsenbeck H, Sales E, Jarrett R, Osarogiagbon R. P3.01-031 Impact of a Novel Lung Gross Dissection Method on Intrapulmonary Lymph Node Yield. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2016.11.1597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Terra A, Huber A, Schweer B, Mertens P, Arnoux G, Balshaw N, Brezinsek S, Egner S, Hartl M, Kampf D, Klammer J, Lambertz H, Morlock C, Murari A, Reindl M, Sanders S, Sergienko G, Spencer G, Samm U, Zauner C. Engineering aspects of a fully mirrored endoscope. Fusion Engineering and Design 2013. [DOI: 10.1016/j.fusengdes.2013.01.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Spencer G. Recruitment in old age psychiatry. Br J Psychiatry 2002; 181:443. [PMID: 12411278 DOI: 10.1192/bjp.181.5.443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Mushrush G, Beal EJ, Spencer G, Wynne JH, Lloyd CL, Hughes JM, Walls CL, Hardy DR. An environmentally benign soybean derived fuel as a blending stock or replacement for home heating oil. J Environ Sci Health A Tox Hazard Subst Environ Eng 2001; 36:613-22. [PMID: 11460320 DOI: 10.1081/ese-100103749] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The use of bio-derived materials both as fuels and/or as blending stocks becomes more attractive as the price of middle distillate fuels, especially home heating oil, continues to rise. Historically, many biomass and agricultural derived materials have been suggested. One of the most difficult problems encountered with home heating oil is that of storage stability. High maintenance costs associated with home heating oil are, in large part, because of this stability problem. In the present research, Soygold, a soybean derived fuel, was added in concentrations of 10%-20% to both a stable middle distillate fuel and an unstable home heating oil. Fuel instability in this article will be further related to the organo-nitrogen compounds present. The soy-fuel mixtures proved stable, and the addition of the soy liquid enhanced both the combustion properties, and dramatically improved the stability of the unstable home heating oil.
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Affiliation(s)
- G Mushrush
- George Mason University, Chemistry Department, Fairfax, VA 22030, USA.
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Spencer G. The role of exercise in successful ageing. Prof Nurse 1999; 15:105-8. [PMID: 10765314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Older people are often expected to accept a passive role in society. Many physical activities have been shown to benefit the mental and physical health of older people. Nurses can help maintain older people's exercise levels by incorporating programmes into nursing care.
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Lukowiak K, Cotter R, Westly J, Ringseis E, Spencer G. Long-term memory of an operantly conditioned respiratory behaviour pattern in lymnaea stagnalis. J Exp Biol 1998; 201 (Pt 6):877-82. [PMID: 9464968 DOI: 10.1242/jeb.201.6.877] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The freshwater snail Lymnaea stagnalis breaths bimodally either through its skin (cutaneous respiration) or via a rudimentary lung opening called the pneumostome (aerial respiration). Aerial respiratory behaviour can be operantly conditioned. Animals placed in an aquatic, hypoxic environment received a tactile stimulus to the pneumostome area every time they attempted to breathe. Over a period of five training sessions (2.5 days), the animals learned not to breathe, and the number of stimuli received in the fifth session was significantly lower than in the first session. These changes in the respiratory behaviour following the operant paradigm were shown to persist for at least 24 h. We aimed to determine whether the changes in the learned behaviour would persist for longer. We obtained direct evidence that the behavioural changes following operant conditioning persisted for at least 4 weeks following the last training session. However, we found that the persistence of this memory was dependent upon the training procedure used. Memory persisted longer following a spaced training procedure (4 weeks) as opposed to a massed training procedure (2 weeks). Yoked control animals showed no changes in their respiratory behaviour over the same time periods. However, if these yoked control animals were subjected to an operant conditioning procedure, their ability to learn was not impeded. This study demonstrated that operant conditioning of a behaviour pattern in a molluscan preparation can result in long-term memory and that the persistence of the memory is contingent on the training procedure used. <P>
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Lukowiak K, Ringseis E, Spencer G, Wildering W, Syed N. Operant conditioning of aerial respiratory behaviour in Lymnaea stagnalis. J Exp Biol 1996; 199:683-91. [PMID: 9318425 DOI: 10.1242/jeb.199.3.683] [Citation(s) in RCA: 158] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In this study, we operantly conditioned the aerial respiratory behaviour of the freshwater snail Lymnaea stagnalis. Aerial respiration in Lymnaea stagnalis is accomplished by the spontaneous opening and closing of its respiratory orifice, the pneumostome, at the water surface. Weak tactile stimulation of the pneumostome area, when the pneumostome is open, evoked only the pneumostome closure response, which is one aspect of the escape-withdrawal reflex. Pneumostome stimulation resulted in its closure and the termination of aerial respiratory activity. A contingent tactile stimulation paradigm was used to operantly condition the animals. Stimulation of the pneumostome whenever the animal attempted to breathe resulted in significantly fewer attempts to open the pneumostome as training progressed. The latency of the first breath (subsequent to stimulation), the number of breaths and the total breathing time were measured before and after each training period. Significant, quantifiable changes in these behavioural parameters were observed only in the operant conditioning group animals. Control animals receiving tactile stimulation to their pneumostome not contingent upon pneumostome opening movements (yoked controls) or those that were physically prevented from surfacing to breathe (hypoxic controls), did not exhibit significant changes in these behavioural parameters. Our data provide the first direct evidence for operant conditioning of respiration in any animal.
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Atav AS, Spencer G. Reprographic paper workers: a preliminary study of occupational risk. AAOHN J 1995; 43:574-6. [PMID: 7575794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
1. The purpose of this descriptive retrospective study was to identify the prevalence of illness and medical problems among the reprographic paper employees which might be occupationally linked. 2. A telephone survey was developed and 162 workers were interviewed about self reported health problems, occupational history, and demographics. 3. The findings of the study strongly suggest that prevalence of illness and medical problems among particular workers within the plant might be occupationally linked. 4. The most significant implication of this study is its ability to show clearly the pivotal role that occupational health nurses can play in identifying occupationally linked employee health problems through research.
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Spencer G, Wood D, Gupta R. Detection of DNA-adducts in normal and tumorous human prostate biopsies by p-32 postlabeling. Int J Oncol 1995; 7:245-8. [PMID: 21552831 DOI: 10.3892/ijo.7.2.245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Prostate cancer is the most commonly diagnosed cancer in men and the second leading cause of male cancer deaths in the United States. Several risk factors have been identified for prostate cancer, including increased serum testosterone levels, dietary fat intake, and ethnicity. In attempts to detect DNA damage in prostate tissue, we examined in a pilot study 18 pairs (36 samples) of normal and tumorous tissue biopsies from patients ages 50-76 years. DNA was isolated from frozen tissue by solvent extractions with DNA yield ranging from 392-1925 mu g/g tissue (mean 849 +/- 339 mu g/g). Analysis of the DNA by the nuclease P1-mediated P-32-postlabeling assay revealed the presence of multiple adducts in all DNA samples, irrespective of whether the tissue was normal or tumorous. Adduct levels generally ranged from 1-34 (mean 8 +/- 8) per 10(9) nucleotides for normal tissue and 3-37 (mean 11 +/- 9) per 10(9) nucleotides for tumorous tissue. Our data suggest (i) accumulation of DNA adducts in both normal and tumorous tissues; (ii) chromatographic similarity of certain adducts; and (iii) on an average, somewhat higher adduct levels in tumorous than normal tissue. Due to the small sample size examined, it remains to be determined if these DNA adducts were related to any of the risk factors.
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Affiliation(s)
- G Spencer
- UNIV KENTUCKY,GRAD CTR TOXICOL,DEPT PREVENT MED & ENVIRONM HLTH,LEXINGTON,KY 40506. UNIV KENTUCKY,GRAD CTR TOXICOL,DEPT UROL SURG,LEXINGTON,KY 40506
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Spencer G, Menéndez J. Comment on "Confined-to-propagating transition of LO phonons in GaAs/AlxGa1-xAs superlattices observed by picosecond Raman scattering". Phys Rev Lett 1994; 72:1571. [PMID: 10055644 DOI: 10.1103/physrevlett.72.1571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Bell GD, Powell KU, Burridge SM, Spencer G, Bolton G, Purser K, Brooks S, Prosser S, Harrison G, Gant PW. Short report: omeprazole plus antibiotic combinations for the eradication of metronidazole-resistant Helicobacter pylori. Aliment Pharmacol Ther 1992; 6:751-8. [PMID: 1486161 DOI: 10.1111/j.1365-2036.1992.tb00740.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Twenty-eight Helicobacter pylori-positive patients with metronidazole-resistant isolates and 25 with metronidazole-sensitive isolates were treated for 14 days with 40 mg omeprazole nocte plus 500 mg amoxycillin t.d.s. Eradication of H. pylori, defined as absence of the organism one month after cessation of treatment, was assessed using the [14C]urea breath test. The eradication rate in patients with metronidazole-resistant isolates was 14/28 (50%) while that in patients was metronidazole-sensitive isolates was 12/25 (48%). In contrast to these encouraging eradication rates, very poor results were obtained with a 7-day course of omeprazole (40 mg nocte) in combination with erythromycin ethylsuccinate (500 mg q.d.s.) and tripotassium dicitrato bismuthate tablets (120 mg q.d.s.). The latter eradication rates were 3/20 (15%) in patients taking erythromycin tablets and 3/19 (16%) in those taking a liquid formulation of erythromycin. All treatment regimens were well tolerated and all patients completed the prescribed course of therapy.
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Affiliation(s)
- G D Bell
- Department of Medicine, Ipswich Hospital, UK
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Winlow W, Yar T, Spencer G, Girdlestone D, Hancox J. Differential effects of general anaesthetics on identified molluscan neurones in situ and in culture. Gen Pharmacol 1992; 23:985-92. [PMID: 1487134 DOI: 10.1016/0306-3623(92)90276-p] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
1. The only unifying principle of general anaesthesia is that general anaesthetics interact with membrane components and no single cellular mechanism appears to explain their widespread effects in the central nervous system. 2. The gastropod mollusc, Lymnaea stagnalis, provides an excellent model system for studies on general anaesthetics because it has large, uniquely identifiable nerve cells. Several of these cells are interneurones with identified neurotransmitters and monosynaptic connections to other cells. 3. Recent work on Lymnaea neurones suggests that calcium currents are depressed by volatile general anaesthetics applied in the clinical range, whilst evidence from other preparations indicates that there is a rise in intracellular calcium concentration following application of these substances. 4. Identified Lymnaea neurones have different responses to applied anaesthetics, irrespective of the anaesthetic used. Following application of halothane, barbiturates and several other anaesthetic agents, some cells gradually become quiescent after a short period, whilst in others a series of paroxysmal depolarizing shifts occur prior to quiescence. 5. Cultured neurones of Lymnaea, Helisoma and related species retain their characteristic action potential types and neurotransmitter identity. Their responses to anaesthetics are similar to those in the intact brain. They may also form synapses in culture. Thus, they are a useful tool for studying the cellular and subcellular actions of general anaesthetics.
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Affiliation(s)
- W Winlow
- Department of Physiology, University of Leeds, England
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Affiliation(s)
- W Winlow
- Department of Physiology, University of Leeds, England
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Kralovec J, Spencer G, Blair AH, Mammen M, Singh M, Ghose T. Synthesis of methotrexate-antibody conjugates by regiospecific coupling and assessment of drug and antitumor activities. J Med Chem 1989; 32:2426-31. [PMID: 2810330 DOI: 10.1021/jm00131a003] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
In order to increase the retention of drug activity, regiospecific coupling has been used to synthesize conjugates of methotrexate (MTX, 1) with normal rabbit IgG (NRG) and a mouse anti-human renal cancer monoclonal IgG (Dal K-20). MTX gamma-methyl ester (4) was produced either by selective esterification of MTX or by coupling of 4-amino-4-deoxy-N10-methylpteroic acid (2) with suitable glutamic acid derivatives. The MTX gamma-methyl ester (4) was then converted to the corresponding hydrazide 6. An amide-linked conjugate was formed when the MTX gamma-hydrazide (6) was converted to reactive acylating species 7 by using tert-butyl nitrite or trifluoroacetaldehyde, which were reacted with nucleophilic centers, presumably epsilon-amino groups, in native IgG. A hydrazone-linked conjugate was formed when MTX gamma-hydrazide (6) was reacted directly with IgG that had first been oxidized with periodate to form polyaldehyde IgG. The regiospecifically synthesized conjugates were somewhat more effective inhibitors in vitro of dihydrofolate reductase and of colony formation by human renal cancer (Caki-1) cells than were control nonregiospecific conjugates.
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Affiliation(s)
- J Kralovec
- Department of Pathology Dalhousie University, Halifax, Nova Scotia, Canada
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Umpleby AM, Trend PS, Chubb D, Conaglen JV, Williams CD, Hesp R, Scobie IN, Wiles CM, Spencer G, Sönksen PH. The effect of a high protein diet on leucine and alanine turnover in acid maltase deficiency. J Neurol Neurosurg Psychiatry 1989; 52:954-61. [PMID: 2507747 PMCID: PMC1031833 DOI: 10.1136/jnnp.52.8.954] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Leucine and alanine production rate was measured in 5 patients with acid maltase deficiency in the postabsorptive state, following 6 months on a normal diet with placebo and 6 months on an isocaloric high protein diet (16-22% protein). Whole body leucine production rate, a measure of protein degradation, expressed in terms of lean body mass was significantly greater than in five control subjects. Following the high protein diet, leucine production rate was decreased in four of the five patients but this was not statistically significant. Alanine production rate expressed in terms of lean body mass was significantly greater than in control subjects. After the high protein diet, alanine production rate and concentration were significantly decreased (p less than 0.05). There were no significant improvements in any of the clinically relevant variables measured in these patients. It is possible that a larger increase in protein intake over a longer time period may have a clinical effect.
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Affiliation(s)
- A M Umpleby
- Department of Medicine, St Thomas' Hospital, London, UK
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Spencer G, Lufkin R, Simons K, Straatsma B, Foos R, Hanafee W. MR of a melanoma simulating ocular neoplasm. AJNR Am J Neuroradiol 1987; 8:921-2. [PMID: 2823589 PMCID: PMC8334486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Spencer G. A comment on Samuel Preston's "family sizes of children and family sizes of women". Demography 1977; 14:369-77. [PMID: 330272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Spencer G. Respirators in Respiratory Failure. West J Med 1969. [DOI: 10.1136/bmj.3.5673.781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Spencer G. Peru--cultural peculiarities and psychiatric phenomena. II. Med J Aust 1966; 1:853-6. [PMID: 5937424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Spencer G, Levy AH. CORRESPONDENCE. Br J Ophthalmol 1932; 16:186. [DOI: 10.1136/bjo.16.3.186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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