10 results on '"Tamminga JJ"'
Search Results
2. PIN16 COST-EFFECTIVENESS OF A PROPHYLACTIC HUMAN PAPILLOMA VIRUS 16/18 VACCINE FOR 12-YEAR-OLD DUTCH GIRLS
- Author
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Westra, TA, primary, Rogoza, R, additional, Ferko, N, additional, Tamminga, JJ, additional, Drummond, MF, additional, Wilschut, JC, additional, and Postma, MJ, additional
- Published
- 2008
- Full Text
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3. Needs with Regard to Decision Support Systems for Treating Patients with Incurable Non-small Cell Lung Cancer.
- Author
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Révész D, Engelhardt EG, Tamminga JJ, Schramel FMNH, Onwuteaka-Philipsen BD, van de Garde EMW, Steyerberg EW, de Vet HCW, and Coupé VMH
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- Attitude of Health Personnel, Humans, Surveys and Questionnaires, Carcinoma, Non-Small-Cell Lung therapy, Decision Support Systems, Clinical, Lung Neoplasms therapy, Needs Assessment, Physicians psychology, Quality of Life
- Abstract
Treatment decision-making for patients with incurable non-small cell lung cancer (NSCLC) is complex due to the rapidly increasing number of treatments and discovery of new biomarkers. Decision support systems (DSS) could assist thoracic oncologists (TO) weighing of the pros and cons of treatments in order to arrive at an evidence-based and personalized treatment advice. Our aim is to inventory (1) TO's needs with regard to DSS in the treatment of incurable (stage IIIB/IV) NSCLC patients, and (2) preferences regarding the development of future tools in this field. We disseminated an online inventory questionnaire among all members of the Section of Oncology within the Society of Physicians in Chest Medicine and Tuberculosis. Telephone interviews were conducted to better contextualize the findings from the questionnaire. In total, 58 TO completed the questionnaire and expressed a need for new DSS. They reported that it is important for tools to include genetic and immune markers, to be sufficiently validated, regularly updated, and time-efficient. Also, future DSS should incorporate multiple treatment options, integrate estimates of toxicity, quality of life and cost-effectiveness of treatments, enhance communication between caregivers and patients, and use IT solutions for a clear interface and continuous updating of tools. With this inventory among Dutch TO, we summarized the need for new DSS to aid treatment decision-making for patients with incurable NSCLC. To meet the expressed needs, substantial additional efforts will be required by DSS developers, above already existing tools.
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- 2020
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4. Decision support systems for incurable non-small cell lung cancer: a systematic review.
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Révész D, Engelhardt EG, Tamminga JJ, Schramel FMNH, Onwuteaka-Philipsen BD, van de Garde EMW, Steyerberg EW, Jansma EP, De Vet HCW, and Coupé VMH
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- Carcinoma, Non-Small-Cell Lung mortality, Decision Support Techniques, Humans, Lung Neoplasms mortality, Prognosis, Carcinoma, Non-Small-Cell Lung therapy, Decision Support Systems, Clinical, Lung Neoplasms therapy, Palliative Care methods
- Abstract
Background: Individually tailored cancer treatment is essential to ensure optimal treatment and resource use. Treatments for incurable metastatic non-small cell lung cancer (NSCLC) are evolving rapidly, and decision support systems (DSS) for this patient population have been developed to balance benefits and harms for decision-making. The aim of this systematic review was to inventory DSS for stage IIIB/IV NSCLC patients., Methods: A systematic literature search was performed in Pubmed, Embase and the Cochrane Library. DSS were described extensively, including their predictors, model performances (i.e., discriminative ability and calibration), levels of validation and user friendliness., Results: The systematic search yielded 3531 articles. In total, 67 articles were included after additional reference tracking. The 39 identified DSS aim to predict overall survival and/or progression-free survival, but give no information about toxicity or cost-effectiveness. Various predictors were incorporated, such as performance status, serum and inflammatory markers, and patient and tumor characteristics. Some DSS were developed for the entire incurable NSCLC population, whereas others were specifically for patients with brain or spinal metastases. Few DSS had been validated externally using recent clinical data, and the discrimination and calibration were often poor., Conclusions: Many DSS have been developed for incurable NSCLC patients, but DSS are still lacking that are up-to-date with a good model performance, while covering the entire treatment spectrum. Future DSS should incorporate genetic and biological markers based on state-of-the-art evidence, and compare multiple treatment options to estimate survival, toxicity and cost-effectiveness.
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- 2017
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5. Cost-effectiveness analysis of various pertussis vaccination strategies primarily aimed at protecting infants in the Netherlands.
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Westra TA, de Vries R, Tamminga JJ, Sauboin CJ, and Postma MJ
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- Adult, Cost-Benefit Analysis, Decision Trees, Female, Humans, Immunization Schedule, Infant, Infant, Newborn, Mass Vaccination economics, Netherlands epidemiology, Parents, Pertussis Vaccine economics, Pregnancy, Quality-Adjusted Life Years, Whooping Cough economics, Whooping Cough epidemiology, Mass Vaccination methods, Pertussis Vaccine administration & dosage, Whooping Cough prevention & control
- Abstract
Background: Pertussis is a highly contagious respiratory disease. Despite a high rate of vaccine coverage through the Dutch national immunization program, the incidence of pertussis remains high in the Netherlands and the risk of infection continues. Because pertussis is most severe in unimmunized infants and infants who have only received some of the recommended doses, new pertussis immunization strategies should be considered to protect this vulnerable population., Objective: This study was designed to estimate the cost-effectiveness of 3 new immunization strategies for possible addition to the current Dutch national immunization program: immunization of the infant at birth, immunization of the parents immediately after birth of the child (cocooning), and maternal immunization during the third trimester of pregnancy., Methods: A literature search was performed in the PubMed database for articles published in English, German, and Dutch using the following terms: pertussis, whooping cough, vaccination strategies, maternal immunization, cocooning, at birth, vaccine efficacy, mortality, underreporting, prevalence, incidence, and cost-effectiveness. A decision-tree model was developed for this analysis, and data on pertussis morbidity and costs were collected consistently for different age groups (infants <1 year of age and adults 25 to 34 years of age). The size of the infant cohort was set at 200,000 to approximate previous Dutch birth cohorts. The size of the adult cohort was set at 401,380 parents for the cocooning strategy and 201,380 mothers for the maternal immunization strategy. Health benefits (quality-adjusted life-years [QALYs]) and costs were estimated in both cohorts for each of the 3 immunization strate- gies. Incremental cost-effectiveness ratios were calculated from both a payer's and a societal perspective. The robustness of the results was determined through sensitivity analysis., Results: In the base-case analysis, cocooning and maternal immunization were found to be effective in reducing the incidence of pertussis among infants (123 and 174 infant cases were expected to be prevented, respectively). Furthermore, cocooning and maternal immunization were estimated to be cost-effective from a payer's perspective (euro4600 [US $6400]/QALY and euro3500 [$4900]/QALY, respectively) and even cost-saving from a societal perspective (savings of up to euro7200 [$10,100] and euro5000 [$7000], respectively). Sensitivity analyses revealed that favorable cost-effectiveness was generally robust. In the sensitivity analysis, the cost-effectiveness of cocooning and maternal immunization was mostly sensitive for changes in assumptions on underreporting (200-fold increase in reported number of symptomatic cases) of pertussis disease and infection. With no underreporting, the ICER was estimated at euro211,900 ($296,700)/QALY for cocooning and euro81,600 ($114,200)/QALY for maternal immunization from a payer's perspective. However, even at much lower levels of underreporting (20- to 30-fold increase in incidence), cost-effectiveness remained favorable. The cost-effectiveness of the third strategy, at-birth immunization, was highly unfavorable (euro329,900 [$461,900]/QALY from a payer's perspective and euro330,100 [$462,100]/ QALY from a societal perspective)., Conclusions: This study estimated that the addition of cocooning or maternal immunization to the current Dutch national immunization program likely would be cost-effective or even cost-saving. These estimates were mainly due to reduction in the number of cases among parents, which are likely to be mild and therefore would largely remain unreported. Immunization at birth was not a cost-effective strategy. Cocooning was the most expensive intervention to implement; however, it resulted in the highest number of QALYs gained (mainly in adults). Maternal immunization would offer better protection of infants, due to maternally acquired antibodies., (2010 Excerpta Medica Inc. All rights reserved.)
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- 2010
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6. Cost-effectiveness of prophylactic vaccination against human papillomavirus 16/18 for the prevention of cervical cancer: adaptation of an existing cohort model to the situation in the Netherlands.
- Author
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Rogoza RM, Westra TA, Ferko N, Tamminga JJ, Drummond MF, Daemen T, Wilschut JC, and Postma MJ
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- Child, Cost-Benefit Analysis, Female, Humans, Models, Statistical, Netherlands epidemiology, Uterine Cervical Neoplasms epidemiology, Papillomavirus Vaccines economics, Papillomavirus Vaccines immunology, Uterine Cervical Neoplasms economics, Uterine Cervical Neoplasms prevention & control
- Abstract
Cervical cancer is one of the most prevalent cancers among women worldwide. Implementation of an HPV-vaccination strategy targeting the major oncogenic types 16 and 18 that cause cervical cancer is generally expected to significantly reduce the burden of cervical cancer disease. Here we estimate the costs, savings and health gains with the addition of HPV-16/18 vaccination to the already existing Dutch screening programme. In the base-case analysis, it was estimated that implementation of an HPV-16/18 vaccine would result in an incremental cost-effectiveness ratio (ICER) of euro22,700 per life-year gained (LYG). In sensitivity analysis, the robustness of our finding of favourable cost-effectiveness was established. The ICER appeared sensitive to the vaccine price, discount rate and duration of vaccine-induced protection. From our results, it validly follows that immunization of 12-year-old Dutch girls against HPV-16/18 infection is a cost-effective strategy for protecting against cervical cancer.
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- 2009
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7. Salmeterol/fluticasone propionate versus fluticasone propionate plus montelukast: a cost-effective comparison for asthma.
- Author
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Pieters WR, Wilson KK, Smith HC, Tamminga JJ, and Sondhi S
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- Acetates therapeutic use, Adolescent, Adult, Aged, Albuterol therapeutic use, Androstadienes therapeutic use, Anti-Asthmatic Agents therapeutic use, Asthma drug therapy, Bronchodilator Agents therapeutic use, Cost-Benefit Analysis, Cyclopropanes, Drug Combinations, Drug Therapy, Combination, Fluticasone, Fluticasone-Salmeterol Drug Combination, Humans, Middle Aged, Multicenter Studies as Topic, Netherlands, Quinolines therapeutic use, Randomized Controlled Trials as Topic, Sulfides, Acetates economics, Albuterol analogs & derivatives, Albuterol economics, Androstadienes economics, Anti-Asthmatic Agents economics, Asthma economics, Bronchodilator Agents economics, Quinolines economics
- Abstract
Introduction and Objective: Asthma, owing to its chronic nature, is associated with a substantial economic burden. Healthcare providers need to compare the cost effectiveness of alternative asthma treatment options to ensure that they obtain the best value for money from the resources they control. The objective of the current study was to compare the cost effectiveness of salmeterol/fluticasone propionate in combination with fluticasone propionate plus montelukast in patients with symptomatic asthma uncontrolled with inhaled corticosteroid (ICS) monotherapy., Study Design and Methods: Direct healthcare resource data were prospectively collected during a double-blind, randomized, 12-week clinical study of inhaled salmeterol/fluticasone propionate 50/100 microg twice daily (n = 356) and inhaled fluticasone propionate 100 microg twice daily plus oral montelukast 10mg daily (n = 369). Resources were costed in Dutch guilders (NLG) from the perspective of The Netherlands healthcare system using 1999/2000 prices, but have been presented in US dollars and euros. The primary effectiveness measure was the proportion of successfully treated weeks (based on mean morning PEF values). Secondary measures were episode-free days, symptom-free days, and symptom-free nights., Results: Salmeterol/fluticasone propionate was more effective than fluticasone propionate plus montelukast as measured by the proportion of successfully treated weeks mean 63.3% vs 39.0%; median difference 25%; p < 0.001). Salmeterol/fluticasone propionate was also more effective than fluticasone propionate plus montelukast according to the secondary effectiveness measures. The mean total direct daily healthcare costs per patient were 16% higher with fluticasone propionate plus montelukast than with salmeterol/fluticasone propionate mainly due to higher drug costs in the former group (2.25 US dollars vs 1.94; 1.92 euro vs 1.66, respectively; the NLG was fixed against the euro at a rate of 1 euro = NLG2.2 on 31 December 1998; 1 US dollars = NLG1.883, June 2003; 1 US dollars= 0.848 euro, June 2003). Incremental cost-effectiveness analyses showed that salmeterol/fluticasone propionate was dominant over fluticasone propionate plus montelukast and sensitivity analyses showed these results to be robust., Conclusion: Salmeterol/fluticasone propionate is a more cost-effective treatment option than fluticasone propionate plus montelukast for patients with symptomatic asthma uncontrolled by ICS.
- Published
- 2005
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8. Nocturnal waking and morning dip of peak expiratory flow in clinically stable asthma patients during treatment. Occurrence and patient characteristics.
- Author
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Van Keimpema AR, Ariaansz M, Tamminga JJ, Nauta JJ, and Postmus PE
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- Adolescent, Adult, Aged, Ambulatory Care Facilities, Asthma complications, Asthma drug therapy, Female, Humans, Incidence, Male, Middle Aged, Peak Expiratory Flow Rate drug effects, Surveys and Questionnaires, Activity Cycles physiology, Anti-Asthmatic Agents therapeutic use, Asthma physiopathology, Peak Expiratory Flow Rate physiology, Wakefulness physiology
- Abstract
The occurrence of nocturnal waking due to asthma and morning dip of the peak expiratory flow (PEF), and the associated patient characteristics were investigated in 103 clinically stable asthmatic patients from a pulmonary outpatient clinic. Analysis of a 1 week diary showed a mean week morning PEF dip (i.e. morning/daytime highest PEF) of 12%. A mean dip of > or = 20% was found in 20% of the patients. Three groups were distinguished: 10% were 'nocturnal-waking patients' (waking up > or = 2 nights a week with a PEF dip of > or = 20%); 19% 'morning-dipping patients' (patients with > or = 3 dips a week of > or = 20% but with waking up on < 2 nights a week) leaving 71% 'remaining patients'. 28% of all patients showed morning PEF dips. In a questionnaire, waking every night was reported by 9%, at least once a week by 42% and once a month by 72%. In 'nocturnal-waking patients' FEV1 and morning and evening PEFs were lower than in 'remaining patients'; complaints during the night and on rising were more severe. The morning PEF dip was the same in 'nocturnal-waking patients' and 'morning-dipping patients'. The occurrence of waking was the same in 'morning-dipping patients' and in the 'remaining patients'. There were no differences in other clinical parameters among the three groups. We conclude that a subset of clinically stable asthma patients presents morning dips and nocturnal waking. They do not differ substantially from the remaining patients in other clinical characteristics.
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- 1997
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9. Comparison of inhaled beclomethasone dipropionate 1000 micrograms twice daily and oral prednisone 10 mg once daily in asthmatic patients.
- Author
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Bosman HG, van Uffelen R, Tamminga JJ, and Paanakker LR
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- Administration, Inhalation, Administration, Oral, Adolescent, Adult, Aged, Asthma blood, Asthma physiopathology, Double-Blind Method, Drug Administration Schedule, Female, Forced Expiratory Volume drug effects, Humans, Hydrocortisone blood, Male, Middle Aged, Peak Expiratory Flow Rate drug effects, Asthma drug therapy, Beclomethasone administration & dosage, Prednisone administration & dosage
- Abstract
Background: Glucocorticosteroids are widely used as drugs of first choice in the treatment of moderate to severe asthma. The effects of inhaled steroids in high doses have been compared with oral prednisone in asthmatic patients in a double blind crossover study., Methods: The trial consisted of a two week run in period followed by two four week treatment periods separated by a four week washout. During the treatment period patients took either 1000 micrograms beclomethasone dipropionate twice daily and placebo tablets once daily, or 10 mg prednisone daily in one morning dose and placebo inhaler twice daily. The effects of treatment on the provocative dose of histamine producing a 20% fall in FEV1 (PC20 histamine), peak flow measurements at home, and spirometric measurements in the clinic, as well as on the basal and stimulated plasma cortisol levels were measured., Results: Seventeen patients with asthma completed the study. After four weeks of treatment beclomethasone dipropionate showed a significantly better effect on morning peak expiratory flow rate than prednisone. There was a trend to a greater improvement in the PC20 histamine in patients receiving beclomethasone dipropionate than in those receiving prednisone. There were no significant differences in spirometric values, symptom scores, or basal and stimulated cortisol levels between the treatments. The within treatment analysis showed a significant effect of prednisone on stimulated cortisol levels but not of beclomethasone dipropionate., Conclusions: Beclomethasone dipropionate 1000 micrograms twice daily has a slightly greater therapeutic effect in this population of asthmatic patients than 10 mg of prednisone once a day with less effect on adrenocortical function.
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- 1994
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10. Primary reactions, plastoquinone and fluorescence yield in subchloroplast fragments prepared with deoxycholate.
- Author
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van Gorkom HJ, Tamminga JJ, and Haveman J
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- Chloroplasts drug effects, Cytochromes metabolism, Darkness, Diuron pharmacology, Electron Transport, Energy Transfer, Ferricyanides, Kinetics, Light, Manganese, Organoids drug effects, Organoids metabolism, Oxidation-Reduction, Plants, Quinones metabolism, Spectrometry, Fluorescence, Spectrophotometry, Temperature, Time Factors, Chloroplasts metabolism, Deoxycholic Acid pharmacology, Photophosphorylation drug effects
- Published
- 1974
- Full Text
- View/download PDF
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