139 results found
Newson R, Strachan D, Corden J, et al., 2000, Fungal and other spore counts as predictors of admissions for asthma in the Trent region, OCCUPATIONAL AND ENVIRONMENTAL MEDICINE, Vol: 57, Pages: 786-792, ISSN: 1351-0711
Newson RB, Shaheen SO, Chinn S, et al., 2000, Paracetamol sales and atopic disease in children and adults: an ecological analysis, EUROPEAN RESPIRATORY JOURNAL, Vol: 16, Pages: 817-823, ISSN: 0903-1936
Lawrenson RA, Tyrer F, Newson RB, et al., 2000, The treatment of depression in UK general practice: selective serotonin reuptake inhibitors and tricyclic antidepressants compared, JOURNAL OF AFFECTIVE DISORDERS, Vol: 59, Pages: 149-157, ISSN: 0165-0327
Tachakra S, Dutton D, Newson R, et al., 2000, How do teleconsultations for remote trauma management change over a period of time?, JOURNAL OF TELEMEDICINE AND TELECARE, Vol: 6, Pages: 12-15, ISSN: 1357-633X
Tachakra S, Lynch M, Newson R, et al., 2000, A comparison of telemedicine with face-to-face consultations for trauma management, JOURNAL OF TELEMEDICINE AND TELECARE, Vol: 6, Pages: 178-181, ISSN: 1357-633X
Newson RB, 2000, A program for saving a model fit as a dataset, Stata Technical Bulletin, Vol: 9
Newson RB, 2000, rglm - Robust variance estimates for generalized linear models, Stata Technical Bulletin, Vol: 9
Tachakra S, Dutton D, Newson R, et al., 2000, How do teleconsultations for remote trauma management change over a period of time?, J Telemed Telecare, Vol: 6 Suppl 1, Pages: S12-S15, ISSN: 1357-633X
We obtained follow-up information about the new patients seen at a minor accident and treatment service (MATS) staffed by emergency nurse practitioners (ENPs). A previous study, of 150 teleconsultations in a six-month period starting in April 1996, was used for comparison. In the present series, 150 teleconsultations occurring in a four-month period starting in April 1999 were studied; the patients constituted 5.6% of the 2658 new attenders or 3.8% of the 3936 total attenders. In comparison with the study three years before, falling teleconsultation rates were partly offset by increasing numbers of attenders and an extension of the ENPs' roles and skills. Teleconsultation rates rose when the number of consultant-run clinics was curtailed and ENP-run clinics replaced some of them. Eligibility to request and report more radiographs reduced the need for teleconsultations, and subsequently teleconsultations for help with interpretation of radiographs fell as the ENPs became more experienced. Specialty residents trusted ENP judgement and accepted telephoned direct admission of cases to their wards. Fewer teleconsultations were required for soft-tissue injuries. Telemedicine is an excellent educational tool.
Zambanini A, Newson RB, Maisey M, et al., 1999, Injection related anxiety in insulin-treated diabetes, DIABETES RESEARCH AND CLINICAL PRACTICE, Vol: 46, Pages: 239-246, ISSN: 0168-8227
Beck EJ, Mandalia S, Williams I, et al., 1999, Decreased morbidity and use of hospital services in English HIV-infected individuals with increased uptake of anti-retroviral therapy 1996-1997. National Prospective Monitoring System Steering Group., AIDS, Vol: 13, Pages: 2157-2164, ISSN: 0269-9370
OBJECTIVE: To investigate the relationship between changing morbidity patterns, the use of hospital services by HIV-infected patients and the uptake of antiretroviral therapy (ART) in England. DESIGN: Prospective serial cross-sectional analyses based on data collected through the National Prospective Monitoring System (NPMS), a multi-centre prospective monitoring system. SETTING: HIV-infected patients seen in 10 clinics, five London and five non-London, during the three semesters, 1 January 1996 to 30 June 1997. MAIN OUTCOME MEASURES: The mean use of hospital services per patient-year, mean new HIV-related opportunistic illnesses per 1000 patient-years and percentage uptake of ART. RESULTS: The use of inpatient services changed particularly among AIDS patients. The mean number of inpatient days for AIDS patients decreased from 19.7 [95% confidence interval (CI) 13.7-25.7] in 1996 to 11.2 (95% CI 6.1-15.6) per patient-year in 1997. Concurrently the number of new AIDS-defining events decreased significantly from 567 (95% CI 529-607) to 203 (95% CI 183-225) per 1000 patient-years. The overall uptake of ART increased significantly from 33% (95% CI 31-35%) to 50% (95% CI 48-52%), and a switch from mono or dual to triple therapy or quadruple or more therapy was observed. However, by mid-1997 only 29% (95% CI 26-32%) of asymptomatic patients and 51% (95% CI 49-54%) of patients with symptomatic non-AIDS were on ART, compared with 69% (95% CI 66-71%) of AIDS patients. CONCLUSION: The observed reduction in new AIDS-defining events has led to a reduction in the need for inpatient hospital care and has been associated with an increased uptake of ART, including a switch to triple therapy. All of these factors are likely to have contributed to the observed reduction in mortality among English AIDS patients. As the overall uptake of ART remained relatively low in English centres further improvements can be anticipated. However, the medium to long-term effects of these treatment re
Beck EJ, Mandalia S, Williams I, et al., 1999, Decreased morbidity and use of hospital services in English HIV-infected individuals with increased uptake of anti-retroviral therapy 1996-1997, AIDS, Vol: 13, Pages: 2157-2164, ISSN: 0269-9370
Mallon E, Newson R, Bunker CB, 1999, HLA-Cw6 and the genetic predisposition to psoriasis: a meta-analysis of published serologic studies, JOURNAL OF INVESTIGATIVE DERMATOLOGY, Vol: 113, Pages: 693-695, ISSN: 0022-202X
Lawrenson RA, Leydon GM, Williams TJ, et al., 1999, Patterns of contraception in UK women with Type 1 diabetes mellitus: a GP database study, DIABETIC MEDICINE, Vol: 16, Pages: 395-399, ISSN: 0742-3071
Lawrenson RA, Leydon GM, Newson RB, et al., 1999, Coronary heart disease in women with diabetes - Positive association with past hysterectomy and possible benefits of hormone replacement therapy, DIABETES CARE, Vol: 22, Pages: 856-857, ISSN: 0149-5992
Hooker RC, Cowap N, Newson R, et al., 1999, Better by half: hypertension in the elderly and the 'rule of halves': a primary care audit of the clinical computer record as a springboard to improving care, FAMILY PRACTICE, Vol: 16, Pages: 123-128, ISSN: 0263-2136
Urdang M, Ansede-Luna G, Muller B, et al., 1999, An independent pilot study into the accuracy and reliability of home blood glucose monitors, LANCET, Vol: 353, Pages: 1065-1066, ISSN: 0140-6736
Zambarakji HJ, Newson RB, Nelson MR, et al., 1999, Prevalence and progression of CMV retinitis in the era of highly active antiretroviral therapy, INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE, Vol: 40, Pages: S872-S872, ISSN: 0146-0404
Mitchell SM, Zambarakji HJ, Newson RB, et al., 1999, CMC diagnoses and progression of CD4 counts and HIV viral load measurements in HIV patients on HAART, INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE, Vol: 40, Pages: S188-S188, ISSN: 0146-0404
Farrell A, Alaghband-Zadeh J, Carter G, et al., 1999, Do some men with acne vulgaris have raised levels of LH?, CLINICAL ENDOCRINOLOGY, Vol: 50, Pages: 393-397, ISSN: 0300-0664
Tachakra S, Ho S, Lynch M, et al., 1998, Should doctors practise resuscitation skills on newly deceased patients? A survey of public opinion, JOURNAL OF THE ROYAL SOCIETY OF MEDICINE, Vol: 91, Pages: 576-578, ISSN: 0141-0768
Mallon E, Young D, Bunce M, et al., 1998, HLA-Cw*0602 and HIV-associated psoriasis, BRITISH JOURNAL OF DERMATOLOGY, Vol: 139, Pages: 527-533, ISSN: 0007-0963
Gibbs RGJ, Todd JC, Irvine C, et al., 1998, Relationship between the regional and national incidence of transient ischaemic attack and stroke and performance of carotid endarterectomy, EUROPEAN JOURNAL OF VASCULAR AND ENDOVASCULAR SURGERY, Vol: 16, Pages: 47-52, ISSN: 1078-5884
Newson R, Strachan D, Archibald E, et al., 1998, Acute asthma epidemics, weather and pollen in England, 1987-1994, EUROPEAN RESPIRATORY JOURNAL, Vol: 11, Pages: 694-701, ISSN: 0903-1936
Farmer RDT, Newson RB, MacRae K, et al., 1997, Mortality from venous thromboembolism among young women in Europe: no evidence for any effect of third generation oral contraceptives, JOURNAL OF EPIDEMIOLOGY AND COMMUNITY HEALTH, Vol: 51, Pages: 630-635, ISSN: 0143-005X
Newson R, Strachan D, Archibald E, et al., 1997, Effect of thunderstorms and airborne grass pollen on the incidence of acute asthma in England, 1990-94, THORAX, Vol: 52, Pages: 680-685, ISSN: 0040-6376
Newson R, From datasets to resultssets in Stata
A resultsset is a Stata dataset created as output by a Stata program.It can be used as input to other Stata programs, which may in turnoutput the results as publication-ready plots or tables. Programs thatcreate resultssets include xcontract, xcollapse, parmest, parmby and descsave. Stata resultssets do asimilar job to SAS output data sets, which are saved to disk files.However, in Stata, the user typically has the options of saving aresultsset to a disk file, writing it to the memory (overwriting anypre-existing data set), or simply listing it. Resultssets are oftensaved to temporary files, using the tempfile command. Thislecture introduces programs that create resultssets, and also programsthat do things with resultssets after they have been created. listtex outputs resultssets to tables that can be inserted into aMicrosoft Word, HTML or LaTeX document. eclplot inputs resultssetsand creates confidence interval plots. Other programs, such as sencode and tostring, process resultssets after they are createdand before they are listed, tabulated or plotted. These programs, usedtogether, have a power not always appreciated if the user simply readsthe on-line help for each package.
Newson R, Parameters behind "nonparametric" statistics: Kendall's tau,Somers' D and median differences, Stata Journal, Vol: 2, Pages: 45-64
So-called "nonparametric" statistical methods are often in fact based on population parameters, which can be estimated (with confidence limits) using the corresponding sample statistics. This article reviews the uses of three such parameters, namely Kendall's tau, Somers' D and the Hodges-Lehmann median difference. Confidence intervals for these are demonstrated using the somersd package. It is argued that confidence limits for these parameters, and their differences,are more informative than the traditional practice of reporting only p-values. These three parameters are also important in defining other tests and parameters, such as the Wilcoxon test, the area under the receiver operating characteristic (ROC) curve, Harrell's C, and the Theil median slope. Copyright 2002 by Stata Corporation.
Newson R, CCWEIGHT: Stata module to generate inverse sampling probability weights
ccweight takes, as input, a varlist whose distinct values correspond to case groups, and a status variable (1 for cases, 0 for controls) in the option status. It creates, as output, a new variable, suitable for use as a pweight variable when the case-control study is analysed by regression with robust variances.
Newson RB, Sensible parameters for polynomials and other splines
Splines, including polynomials, are traditionally used to model nonlinear relationships involving continuous predictors. However, when they are included in linear models (or generalized linear models), the estimated parameters for polynomials are not easy for nonmathematicians to understand, and the estimated parameters for other splines are often not easy even for mathematicians to understand. It would be easier if the parameters were differences or ratios between the values of the spline at the reference points and the value of the spline at a base reference point or if the parameters were values of the polynomial or spline at reference points on the x-axis, or The bspline package can be downloaded from Statistical Software Components, and generates spline bases for inclusion in the design matrices of linear models, based on Schoenberg B-splines. The package now has a recently added module flexcurv, which inputs a sequence of reference points on the x-axis and outputs a spline basis, based on equally spaced knots generated automatically, whose parameters are the values of the spline at the reference points. This spline basis can be modified by excluding the spline vector at a base reference point and including the unit vector. If this is done, then the parameter corresponding to the unit vector will be the value of the spline at the base reference point, and the parameters corresponding to the remaining reference spline vectors will be differences between the values of the spline at the corresponding reference points and the value of the spline at the base reference point. The spline bases are therefore extensions, to continuous factors, of the bases of unit vectors and/or indicator functions used to model discrete factors. It is possible to combine these bases for different continuous and/or discrete factors in the same way, using product bases in a design matrix to estimate factor-value combination means and/or factor-value effects and/or factor interactions.
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