Morten Wang Fagerland

Learn More
We examine the properties of several tests for goodness-of-fit for multinomial logistic regression. One test is based on a strategy of sorting the observations according to the complement of the estimated probability for the reference outcome category and then grouping the subjects into g equal-sized groups. A g x c contingency table, where c is the number(More)
BACKGROUND We recently reported reduced prostate cancer (PCa)-specific mortality for β-blocker users among patients receiving androgen-deprivation therapy in a health survey cohort including 655 PCa patients. Information on clinical characteristics was limited. OBJECTIVE To assess the association between β-blockers and PCa-specific mortality in a cohort(More)
BACKGROUND High amounts of sedentary behaviour have been associated with increased risks of several chronic conditions and mortality. However, it is unclear whether physical activity attenuates or even eliminates the detrimental effects of prolonged sitting. We examined the associations of sedentary behaviour and physical activity with all-cause mortality.(More)
Tests for comparing the locations of two independent populations are associated with different null hypotheses, but results are often interpreted as evidence for or against equality of means or medians. We examine the appropriateness of this practice by investigating the performance of five frequently used tests: the two-sample T test, the Welch U test, the(More)
BACKGROUND Experimental evidence suggests a role for the β(2) -adrenergic receptor pathway in prostate cancer (PCa). We have investigated the association of β-blocker use with PCa incidence and survival in a Norwegian cohort. METHODS Data from the Oslo II study in 2000 (n = 6515) were linked with information from the Cancer Registry of Norway and(More)
The asymptotic Pearson's chi-squared test and Fisher's exact test have long been the most used for testing association in 2x2 tables. Unconditional tests preserve the significance level and generally are more powerful than Fisher's exact test for moderate to small samples, but previously were disadvantaged by being computationally demanding. This(More)
BACKGROUND Laparoscopic liver resection is used in specialized centers all over the world. However, laparoscopic liver resection has never been compared with open liver resection in a prospective, randomized trial. METHODS/DESIGN The Oslo-CoMet Study is a randomized trial into laparoscopic versus open liver resection for the surgical management of hepatic(More)
BACKGROUND Statistical methods that use the mid-p approach are useful tools to analyze categorical data, particularly for small and moderate sample sizes. Mid-p tests strike a balance between overly conservative exact methods and asymptotic methods that frequently violate the nominal level. Here, we examine a mid-p version of the McNemar exact conditional(More)
BACKGROUND Gastric bypass and duodenal switch are currently performed bariatric surgical procedures. Uncontrolled studies suggest that duodenal switch induces greater weight loss than gastric bypass. OBJECTIVE To determine whether duodenal switch leads to greater weight loss and more favorable improvements in cardiovascular risk factors and quality of(More)
Levels of circulating cardiac troponin I (cTnI) or T are correlated to extent of myocardial destruction after an acute myocardial infarction. Few studies analyzing this relation have employed a second-generation cTnI assay or cardiac magnetic resonance (CMR) as the imaging end point. In this post hoc study of the Efficacy of FX06 in the Prevention of(More)