Håkon K. Gjessing

Frailty models based on Lévy processes (2003)

Gjessing, Håkon K., Aalen, Odd O., Hjort, Nils Lid

Generalizing the standard frailty models of survival analysis, we propose to model frailty as a weighted Lévy process. Hence, the frailty of an individual is not a fixed quantity, but develops over...

Understanding the shape of the hazard rate: a process point of view (With comments and a rejoinder by the authors) (2001)

Aalen, Odd O., Gjessing, Håkon K.

Survival analysis as used in the medical context is focused on the concepts of survival function and hazard rate, the latter of these being the basis both for the Cox regression model and of the...

Fetal and maternal contributions to risk of pre-eclampsia: population based study

Lie, Rolv Terje, Rasmussen, Svein, Brunborg, Helge, Gjessing, Håkon K, Lie-Nielsen, Erik, Irgens, Lorentz M

Objective: To use familial patterns of recurrence of pre-eclampsia to investigate whether paternal genes expressed in the fetus contribute to the mother’s risk of pre-eclampsia and whether...

Genetic polymorphisms in arginase I and II and childhood asthma and atopy

Li, Huiling, Romieu, Isabelle, Sienra-Monge, Juan-Jose, Ramirez-Aguilar, Matiana, Rio-Navarro, Blanca Estela Del, Kistner, Emily O., ...

Fetal and maternal contributions to risk of pre-eclampsia: population based study

Lie, Rolv Terje, Rasmussen, Svein, Brunborg, Helge, Gjessing, Håkon K, Lie-Nielsen, Erik, Irgens, Lorentz M

Objective: To use familial patterns of recurrence of pre-eclampsia to investigate whether paternal genes expressed in the fetus contribute to the mother’s risk of pre-eclampsia and whether...