Apostolos Gkatzionis
Overview
Explore the profile of Apostolos Gkatzionis including associated specialties, affiliations and a list of published articles.
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17
Citations
585
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Recent Articles
1.
Gkatzionis A, Seaman S, Hughes R, Tilling K
Stat Methods Med Res
. 2025 Mar;
:9622802241306860.
PMID: 40025692
Collider bias occurs when conditioning on a common effect (collider) of two variables . In this article, we quantify the collider bias in the estimated association between exposure and outcome...
2.
Easey K, Gkatzionis A, Millard L, Tilling K, Lawlor D, Sharp G
J Dev Orig Health Dis
. 2024 Oct;
15:e25.
PMID: 39465608
Paternal exposures (and other non-maternal factors) around pregnancy could have important effects on offspring health. One challenge is that data on partners are usually from a subgroup of mothers with...
3.
Shapland C, Gkatzionis A, Hemani G, Tilling K
Genet Epidemiol
. 2024 Jul;
49(1):e22584.
PMID: 39080969
Observational studies are rarely representative of their target population because there are known and unknown factors that affect an individual's choice to participate (the selection mechanism). Selection can cause bias...
4.
Gkatzionis A, Tchetgen Tchetgen E, Heron J, Northstone K, Tilling K
Stat Med
. 2024 Jul;
43(22):4250-4271.
PMID: 39039030
Selection bias is a common concern in epidemiologic studies. In the literature, selection bias is often viewed as a missing data problem. Popular approaches to adjust for bias due to...
5.
Lawton M, Ben-Shlomo Y, Gkatzionis A, Hu M, Grosset D, Tilling K
Eur J Epidemiol
. 2024 Jan;
39(5):521-533.
PMID: 38281297
Identifying factors that are causes of disease progression, especially in neurodegenerative diseases, is of considerable interest. Disease progression can be described as a trajectory of outcome over time-for example, a...
6.
Hemani G, Gkatzionis A, Tilling K, Davey Smith G
Genet Epidemiol
. 2023 Jul;
47(6):461-462.
PMID: 37417943
No abstract available.
7.
Mitchell R, Hartley A, Walker V, Gkatzionis A, Yarmolinsky J, Bell J, et al.
PLoS Genet
. 2023 Feb;
19(2):e1010596.
PMID: 36821633
Genetic studies of disease progression can be used to identify factors that may influence survival or prognosis, which may differ from factors that influence on disease susceptibility. Studies of disease...
8.
Burgess S, Mason A, Grant A, Slob E, Gkatzionis A, Zuber V, et al.
Am J Hum Genet
. 2023 Feb;
110(2):195-214.
PMID: 36736292
Evidence on the validity of drug targets from randomized trials is reliable but typically expensive and slow to obtain. In contrast, evidence from conventional observational epidemiological studies is less reliable...
9.
Gkatzionis A, Burgess S, Newcombe P
Genet Epidemiol
. 2022 Oct;
47(1):3-25.
PMID: 36273411
Mendelian randomization (MR) is the use of genetic variants to assess the existence of a causal relationship between a risk factor and an outcome of interest. Here, we focus on...
10.
Soremekun O, Karhunen V, He Y, Rajasundaram S, Liu B, Gkatzionis A, et al.
EBioMedicine
. 2022 Mar;
78:103953.
PMID: 35325778
Background: Dyslipidaemia is highly prevalent in individuals with type 2 diabetes mellitus (T2DM). Numerous studies have sought to disentangle the causal relationship between dyslipidaemia and T2DM liability. However, conventional observational...