Dirk Wetzel

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BACKGROUND Non-participation of General Practitioners (GPs) hampers primary care research. Using existing network structures can improve participation, but may introduce sampling effects. OBJECTIVES To examine the role of network-based recruitment and other determinants of participation, and to estimate effects of sampling and non-participation on(More)
BACKGROUND AND PURPOSE Psychosocial distress is a common phenomenon in patients with heart failure (HF). The aim of this study was to analyze psychosocial co-symptoms and their relationship with clinical and sociodemographic factors. METHODS In 363 primary care patients with HF, anxiety, depression and negative affectivity (HADS, DS-14), disease coping(More)
BACKGROUND Screening of primary care patients at risk for left ventricular systolic dysfunction by a simple blood-test might reduce referral rates for echocardiography. Whether or not natriuretic peptide testing is a useful and cost-effective diagnostic instrument in primary care settings, however, is still a matter of debate. METHODS N-terminal pro-brain(More)
BACKGROUND To date, evidence-based recommendations help doctors to manage patients with heart failure (HF). However, the implementation of these recommendations in primary care is still problematic as beneficial drugs are infrequently prescribed. The aim of the study was to determine whether admission to hospital increases usage of beneficial HF medication(More)
An approach to road parameter recognition in monocular image sequences under egomotion is described. Two stabilization mechanisms are integrated into the basic recursive estimation procedure: a short sequence averaging of individual measurements and a scalar filter for long-term stabilization. Besides the bottom-up measurements a second type of road(More)
In Germany, use and contents of EPRs are largely unknown and expected to be highly variable, due to missing standards. We conducted a telephone survey to describe and compare computer documentation habits in general practices. Specifically, we were interested in: (1) the type of medical data recorded; and (2) which factors influence the extent to which(More)
BACKGROUND Quality of Life (QoL) is an important predictor of mortality and re-admission in patients with heart failure (HF). Our aim was to analyze disease-specific quality of life and its relationship to psycho-social factors and HF severity. METHODS In primary care patients with HF, quality of life (MLHFQ), anxiety, depression (HADS) and negative(More)