Missing data are ubiquitous in medical research. Although there is increasing guidance on
how to handle missing data, practice is changing slowly and misapprehensions abound …

Background There is limited and conflicting evidence for associations between use of
screen-based technology and anxiety and depression in young people. We examined …

Background: Advances in the management of congenital heart disease (CHD) patients have
enabled improvement in long-term survival even for those with serious defects. Research …

Background In observational research, choosing an optimal analysis strategy when
variables are incomplete requires an understanding of the factors associated with ongoing …

Background: Most epidemiological studies have missing information, leading to reduced
power and potential bias. Estimates of exposure-outcome associations will generally be …

Background Higher maternal pre-pregnancy body mass index (BMI) has been associated
with higher risk of stillbirth, infant and neonatal mortality. Studies exploring underweight …

Objectives Epidemiological studies often have missing data, which are commonly handled
by multiple imputation (MI). Standard (default) MI procedures use simple linear covariate …

Objective To compare the prevalence of common mental disorders (CMDs) derived from
data held in primary care records with that measured using the revised Clinical Interview …

Background Preterm birth (PTB) is a leading cause of child morbidity and mortality. Evidence
suggests an increased risk with both maternal underweight and obesity, with some studies …

Introduction In adults, multimorbidity is associated with social position. Socially
disadvantaged adults typically experience more chronic illness at a younger age than …