Blar i UiS Brage på forfatter "Kvaløy, Jan Terje"
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New tests for trend in time censored recurrent event data
Lindqvist, Bo Henry; Kvaløy, Jan Terje (Peer reviewed; Journal article, 2024-01)We consider testing for trend in recurrent event data. More precisely, for such data we consider testing of the null hypothesis of data coming from a renewal process. The new tests are essentially obtained by considering ... -
New tests for trend in time censored recurrent event data
Lindqvist, Bo Henry; Kvaløy, Jan Terje (Peer reviewed; Journal article, 2024)We consider testing for trend in recurrent event data. More precisely, for such data we consider testing of the null hypothesis of data coming from a renewal process. The new tests are essentially obtained by considering ... -
Newborn resuscitation simulation training and changes in clinical performance and perinatal outcomes: a clinical observational study of 10,481 births
Vadla, May Sissel; Moshiro, Robert; Mdoe, Paschal Francis; Eilevstjønn, Joar; Kvaløy, Jan Terje; Hhando, Barikiel; Ersdal, Hege Langli (Peer reviewed; Journal article, 2022-11)Annually, 1.5 million intrapartum-related deaths occur; fresh stillbirths and early newborn deaths. Most of these deaths are preventable with skilled ventilation starting within the first minute of life. Helping Babies ... -
Newborns requiring resuscitation: Two thirds have heart rate ≥100 beats/minute in the first minute after birth
Kibsgaard-Petersen, Amalie; Ersdal, Hege Langli; Kvaløy, Jan Terje; Eilevstjønn, Joar; Rettedal, Siren (Peer reviewed; Journal article, 2023-01)Aim The aim was to study the prevalence of bradycardia at birth in newborns requiring positive pressure ventilation (PPV), distribution of first measured heart rate (HR), changes in HR before start of PPV and HR response ... -
Om sammenhengen mellom motivasjon, studentaktiv undervisning og konstruktive tilbakemeldinger. En studie fra Universitetet i Stavanger.
Abrahamsen, Eirik Bjorheim; Selvik, Jon Tømmerås; Moen, Vegard; Kvaløy, Jan Terje (Peer reviewed; Journal article, 2020-11)I denne artikkelen undersøker vi hvorvidt det er sammenheng mellom studentaktiv undervisning og studentenes motivasjon, og videre, hvorvidt det er sammenheng mellom studentenes motivasjon og studentenes oppfatning av de ... -
The overriding role of surgery and tumor grade for long-term survival in patients with gastroenteropancreatic neuroendocrine neoplasms: A population-based cohort study
Søreide, Jon Arne; Kvaløy, Jan Terje; Lea, Dordi; Sandvik, Oddvar M.; Al-Saiddi, Mohammed; Haslerud, Torjan M.; Garresori, Herish; Karlsen, Lars Normann; Gudlaugsson, Einar; Søreide, Kjetil (Peer reviewed; Journal article, 2021-06)Background Gastroenteropancreatic neuroendocrine neoplasms (GEP-NENs) comprise a heterogeneous disease group. Factors that affect long-term survival remain uncertain. Complete population-representative cohorts with long-term ... -
Plasma tumour necrosis factor correlates with mRNA expression of tumour necrosis factor and mitochondrial transcription factors in skeletal muscle in patients with chronic heart failure treated with cardiac resynchronization therapy: potential role in myopathy
Larsen, Alf Inge; Valborgland, Torstein; Ogne, Christer; Lindal, Sigurd; Halvorsen, Bente; Munk, Peter Scott; Kvaløy, Jan Terje; Aukrust, Pål; Yndestad, Arne (Journal article; Peer reviewed, 2019-06)Chronic heart failure (CHF) is characterized by inflammation and skeletal muscle myopathy, including impaired fibre type distribution and reduced capillary density, reduced cytochrome oxidase activity and reduced mitochondrial ... -
Potential causes of early death among admitted newborns in a rural Tanzanian hospital
Moshiro, Robert Deogratias; Perlman, Jeffrey M.; Mdoe, Paschal Francis; Hussein, Kidanto; Kvaløy, Jan Terje; Ersdal, Hege Langli (Peer reviewed; Journal article, 2019-10)Background Approximately 40,000 newborns die each year in Tanzania. Regional differences in outcome are common. Reviewing current local data, as well as defining potential causal pathways leading to death are urgently ... -
Prevalence of bradycardia in 4876 newborns in the first minute after birth and association with positive pressure ventilation: A population-based cross-sectional study
Rettedal, Siren; Kibsgaard-Petersen, Amalie; Kvaløy, Jan Terje; Eilevstjønn, Joar; Ersdal, Hege Langli (Peer reviewed; Journal article, 2023)Objective To determine the prevalence of bradycardia in the first minute after birth and association with positive pressure ventilation (PPV). Method A population-based cross-sectional study was conducted from June 2019 ... -
A probabilistic function to model the relationship between quality of chest compressions and the physiological response for patients in cardiac arrest
Eftestøl, Trygve Christian; Stokka, Svein Erik; Kvaløy, Jan Terje; Rad, Ali Bahrami; Irusta, Unai; Aramendi, Elisabete; Alonso, Erik; Nordseth, Trond; Skogvoll, Eirik; Wik, Lars; Kramer-Johansen, Jo (Peer reviewed; Journal article, 2020)Cardiopulmonary resuscitation quality (CPRQ) parameters can be derived from electric signals obtained during resuscitation. We propose to model a probabilistic relationship between CPRQ parameters and the physiological ... -
A probabilistic function to model the relationship between quality of chest compressions and the physiological response for patients in cardiac arrest
Eftestøl, Trygve Christian; Stokka, Svein Erik; Kvaløy, Jan Terje; Rad, Ali Bahrami; Irusta, Unai; Aramendi, Elisabete; Alonso, Erik; Nordseth, Trond; Skogvoll, Eirik; Wik, Lars; Kramer-Johansen, Jo (Peer reviewed; Journal article, 2020) -
Pulseless electrical activity in in-hospital cardiac arrest – A crossroad for decisions
Norvik, Anders; Unneland, Eirik; Bergum, Daniel; Buckler, D.G.; Bhardwaj, A.; Eftestøl, Trygve Christian; Aramendi, E.; Nordseth, Trond; Abella, B.S.; Kvaløy, Jan Terje; Skogvoll, Eirik (Peer reviewed; Journal article, 2022)Background PEA is often seen during resuscitation, either as the presenting clinical state in cardiac arrest or as a secondary rhythm following transient return of spontaneous circulation (ROSC), ventricular fibrillatio ... -
Reduction in omission events after implementing a Rapid Response System: a mortality review in a department of gastrointestinal surgery
Olsen, Siri Lerstøl; Nedrebø, Bjørn Steinar Olden; Strand, Kristian; Søreide, Eldar; Kvaløy, Jan Terje; Hansen, Britt Sætre (Peer reviewed; Journal article, 2023-02)Background Hospitals worldwide have implemented Rapid Response Systems (RRS) to facilitate early recognition and prompt response by trained personnel to deteriorating patients. A key concept of this system is that it ... -
Relative Survival Methods – Theory, Applications and Extensions to Monitoring
Tran, Jimmy Huy (Master thesis, 2022)In cancer research, one is often interested in the part of the hazard which corresponds to the disease. If the cause of death is unknown as in cancer registry data, the standard methods in survival analysis do not distinguish ... -
“Safer Births Bundle of Care” Implementation and Perinatal Impact at 30 Hospitals in Tanzania—Halfway Evaluation
Ersdal, Hege Langli; Mdoe, Paschal Francis; Mduma, Estomih; Moshiro, Robert Deogratias; Guga, Godfrey; Kvaløy, Jan Terje; Bundala, Felix; Marwa, Boniphace; Kamala, Benjamin (Peer reviewed; Journal article, 2023-01)Safer Births Bundle of Care (SBBC) consists of innovative clinical and training tools for improved labour care and newborn resuscitation, integrated with new strategies for continuous quality improvement. After implementation, ... -
Serum concentrations of active tamoxifen metabolites predict long-term survival in adjuvantly treated breast cancer patients
Helland, Thomas; Henne, Nina; Bifulco, Ersilia; Naume, Bjørn; Borgen, Elin; Kristensen, Vessela N.; Kvaløy, Jan Terje; Lash, Timothy L; Grenaker, Grethe Irene; van Schaik, RHN; Janssen, Emiel; Hustad, Steinar; Lien, Ernst Asbjørn; Mellgren, Gunnar; Søiland, Håvard (Journal article; Peer reviewed, 2017)Background Controversies exist as to whether the genetic polymorphisms of the enzymes responsible for the metabolism of tamoxifen can predict breast cancer outcome in patients using adjuvant tamoxifen. Direct measurement ... -
Simulation-based training and data-guided feedback for neonatal resuscitation in rural Tanzania
Vadla, May Sissel (PhD thesis UiS;, Doctoral thesis, 2023)Summary Background: Globally, 1.4 million newborns die every year due to intrapartum related events and fresh stillbirths, nearly all occurring in low and middle-income countries. Many of these deaths could be prevented ... -
State transition modeling of complex monitored health data
Schulz, Jörn; Kvaløy, Jan Terje; Engan, Kjersti; Eftestøl, Trygve Christian; Jatosh, Samwel; Hussein, Kidanto; Ersdal, Hege Langli (Peer reviewed; Journal article, 2019)This article considers the analysis of complex monitored health data, where often one or several signals are reflecting the current health status that can be represented by a finite number of states, in addition to a set ... -
Statistiske metoder for analyse av data fra nasjonale prøver og undersøkelser i skoleverket.
Johannessen, Håkon Berg. (Master thesis, 2021)Nasjonale prøver ble for første gang gjennomført våren 2004. En forskningsbasert evaluering av prøvene i 2005 anbefalte sterkt en kraftig kompetanseheving på testteori og psykometri for de som utvikler og for de som leder ... -
Survival Analysis using Cox Regression on Breast Cancer Data
Eilertsen, Dag Recep Eroglu (Master thesis, 2020-06)In this report, survival data from a german breast cancer study has been analysed using the programming software R. For the 686 female patients participating in the study, the value of eight explanatory variables were ...