Browsing NTNU Open by Author "Kvaløy, Jan Terje"
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A Class of Tests for Trend in Time Censored Recurrent Event Data
Kvaløy, Jan Terje; Lindqvist, Bo Henry (Journal article; Peer reviewed, 2019)Statistical tests for trend in recurrent event data not following a Poisson process are generally constructed for event censored data. However, time censored data are more frequently encountered in practice. In this article, ... -
Air versus Sulfur Hexafluoride Gas Tamponade for Small and Medium-Sized Macular Holes: A Randomized Noninferiority Trial
Lindtjørn, Birger; Krohn, Jørgen Gitlesen; Haugstad, Marta; Stene-Johansen, Ingar; Austeng, Dordi; Basit, Samy; Fossen, Kristian Anker; Varhaug, Pål; Kvaløy, Jan Terje; Forsaa, Vegard Asgeir (Peer reviewed; Journal article, 2022)Purpose To investigate whether air tamponade is noninferior to sulfur hexafluoride (SF6) gas tamponade for small (≤ 250 μm) and medium-sized (> 250 μm and ≤ 400 μm) macular holes (MHs). Design Multicenter, randomized ... -
Factors Affecting the Course of Resuscitation From Cardiac Arrest With Pulseless Electrical Activity in Children and Adolescents
Skogvoll, Eirik; Nordseth, Trond; Sutton, Robert M.; Eftestøl, Trygve Christian; Irusta, Unai; Aramendi, Elisabete; Niles, Dana E.; Nadkarni, Vinay M.; Berg, Robert A.; Abella, Benjamin S.; Kvaløy, Jan Terje (Peer reviewed; Journal article, 2020)Background: Although in-hospital pediatric cardiac arrests and cardiopulmonary resuscitation occur >15,000/year in the US, few studies have assessed which factors affect the course of resuscitation in these patients. We ... -
Heart rate and QRS duration as biomarkers predict the immediate outcome from pulseless electrical activity
Norvik, Anders; Kvaløy, Jan Terje; Skjeflo, Gunnar Waage; Bergum, Daniel; Nordseth, Trond; Loennechen, Jan Pål; Unneland, Eirik; Buckler, D.G.; Bhardwaj, A.; Eftestøl, Trygve Christian; Aramendi, E.; Abella, BS.; Skogvoll, Eirik (Journal article; Peer reviewed, 2023)Introduction:Pulseless electrical activity (PEA) is commonly observed in in-hospital cardiac arrest (IHCA). Universally available ECG characteristics such as QRS duration (QRSd) and heart rate (HR) may develop differently ... -
New tests for trend in time censored recurrent event data
Lindqvist, Bo Henry; Kvaløy, Jan Terje (Journal article; Peer reviewed, 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 ... -
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 ... -
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 (Journal article; Peer reviewed, 2022)