Fecundability among Danish women with a history of miscarriage: a prospective cohort study.

Objective: To examine the association between history of miscarriage and fecundability (the cycle-specific probability of conception).

Design: Nationwide prospective cohort study using web-based questionnaires.

Setting: Denmark, 2007-2012.

Weight at birth and subsequent fecundability: a prospective cohort study.

Objective: To examine the association between a woman's birth weight and her subsequent fecundability.

Method: In this prospective cohort study, we included 2,773 Danish pregnancy planners enrolled in the internet-based cohort study "Snart-Gravid", conducted during 2007-2012. Participants were 18-40 years old at study entry, attempting to conceive, and were not receiving fertility treatment.

Registration of acute stroke: validity in the Danish Stroke Registry and the Danish National Registry of Patients.

Background: The validity of the registration of patients in stroke-specific registries has seldom been investigated, nor compared with administrative hospital discharge registries. The objective of this study was to examine the validity of the registration of patients in a stroke-specific registry (The Danish Stroke Registry [DSR]) and a hospital discharge registry (The Danish National Patient Registry [DNRP]).

Methods: Assuming that all patients with stroke were registered in either the DSR, DNRP or both, we first identified a sample of 75 patients registered with stroke in 2009; 25 patients in the DSR, 25 patients in the DNRP, and 25 patients registered in both data sources.

Change in the prevalence of obesity and use of health care in Denmark: an observational study.

Purpose: The purpose of this study was to examine the influence of the increasing prevalence of obesity on the development of health care utilization in Denmark in the period 1987-2005.

Patients And Methods: From a random sample of adult Danes (19,142 women and 18,335 men) who participated in the Danish Health Interview Surveys in 1987, 1994, 2000, and 2005, self-reported data on type of health care utilization within the previous 3 months and on height and weight were obtained.

Results: Adjusted odds ratios (ORs) showed that an increased use of health care among obese men compared with those of normal weight was pronounced and significant for those aged 45-64 years, whereas it was weaker and borderline significant for those aged 25-44 and 65+ years.