Sample size in qualitative interview studies: guided by information power

K Malterud, VD Siersma… - Qualitative health …, 2016 - journals.sagepub.com
Sample sizes must be ascertained in qualitative studies like in quantitative studies but not by
the same means. The prevailing concept for sample size in qualitative studies is “saturation.” …

Long-term psychosocial consequences of false-positive screening mammography

J Brodersen, VD Siersma - The Annals of Family Medicine, 2013 - Annals Family Med
PURPOSE Cancer screening programs have the potential of intended beneficial effects, but
they also inevitably have unintended harmful effects. In the case of screening …

Lacrimal gland lesions in Denmark between 1974 and 2007

SL von Holstein, MH Therkildsen… - Acta …, 2013 - Wiley Online Library
Purpose: To evaluate the incidence rate, distribution, patient characteristics and indications
for surgical intervention of lacrimal gland lesions in Denmark between 1974 and 2007 …

Postoperative cognitive dysfunction: true deterioration versus random variation

LS Rasmussen, VD Siersma… - Acta anaesthesiologica …, 2004 - Wiley Online Library
Background: Postoperative cognitive dysfunction (POCD) is a common complication,
especially in the elderly. The aim of this study was to describe how variability in …

Perioperative hyperoxia—long-term impact on cardiovascular complications after abdominal surgery, a post hoc analysis of the PROXI trial

S Fonnes, I Gögenur, ES Søndergaard… - International Journal of …, 2016 - Elsevier
Background Increased long-term mortality was found in patients exposed to perioperative
hyperoxia in the PROXI trial, where patients undergoing laparotomy were randomised to …

Association of maternal self-medication and over-the-counter analgesics for children

JF Jensen, M Gottschau, VD Siersma… - …, 2014 - publications.aap.org
OBJECTIVE: Self-medication with over-the-counter (OTC) analgesics, such as paracetamol
(PCM), among children and adolescents is increasing and constitutes an important public …

[HTML][HTML] How well do general practitioners know their elderly patients' social relations and feelings of loneliness?

TD Due, H Sandholdt, VD Siersma, FB Waldorff - BMC family practice, 2018 - Springer
Background Social relationships are important to people and affect their quality of life,
morbidity and mortality. The aim of this study was to examine the correlation between elderly …

Eosinophilia in routine blood samples and the subsequent risk of hematological malignancies and death

CL Andersen, VD Siersma… - American journal of …, 2013 - Wiley Online Library
Eosinophilia may represent an early paraclinical sign of hematological malignant disease,
but no reports exist on its predictive value for hematological malignancies. From the …

Comparing the effect of non-medical mechanical restraint preventive factors between psychiatric units in Denmark and Norway

J Bak, V Zoffmann, DM Sestoft, R Almvik… - Nordic Journal of …, 2015 - Taylor & Francis
Background: The use of mechanical restraint (MR) is controversial, and large differences
regarding the use of MR are often found among countries. In an earlier study, we observed …

The Copenhagen primary care differential count (CopDiff) database

CL Andersen, VD Siersma, W Karlslund… - Clinical …, 2014 - Taylor & Francis
Background The differential blood cell count provides valuable information about a person's
state of health. Together with a variety of biochemical variables, these analyses describe …