Jan Leo Huelsemann

Learn More
OBJECTIVE To investigate the level of detail required in self-reported health care utilization questionnaires for administration to patients with rheumatoid arthritis (RA). METHODS A preliminary questionnaire was developed on the basis of existing tools for use in rheumatic conditions and in-depth interviews with 10 RA patients. Data gathered over 1 year(More)
OBJECTIVE To develop a systematic set of German cost data in rheumatoid arthritis (RA) based solely on valid healthcare payer's cost data sources. METHODS Retrospectively one year cost data of 338 patients with RA were generated and analysed. The cost data were derived from a major statutory health insurance plan ("Allgemeine Ortskrankenkasse(More)
OBJECTIVE To determine rheumatoid arthritis related out of pocket expenditure (OOPE) in Germany and to disaggregate the total OOPE into contributing cost domains. METHODS Data for the cost analysis were drawn from a multicentre randomised controlled prospective trial to assess the effectiveness of clinical quality management in patients with rheumatoid(More)
The aim of our study was to comprehensively review and critically appraise the cost domains used in economic evaluations of the rheumatic diseases and to use this information to propose standardization of cost domains. The literature search identified 210 abstracts, 32 of which included original cost data. The listed cost categories were grouped into 3(More)
We compared the major characteristics of internationally applied cost assessment instruments (CAI) in rheumatic conditions. Fifteen utilization questionnaires were identified and assessed using a structured approach. The forms differed considerably with respect to applied characteristics: length (3-113 items), recall period (between 1 week and 1 year),(More)
OBJECTIVE To describe the features of undifferentiated arthritis in an early synovitis out-patient clinic. METHODS In a two-year prospective cohort study 320 patients with rheumatic symptoms of less than one year were investigated in an early synovitis out-patient clinic. Besides the clinical parameters, an intensive laboratory program was performed,(More)
OBJECTIVE To evaluate the diagnostic performance of classification criteria for rheumatoid arthritis (RA) and reactive arthritis (ReA) in an early synovitis outpatient clinic. METHODS In a prospective two year survey consecutive patients with early synovitis of less than one year duration were documented using a standardised registry and were classified(More)
The aim of our review was to examine recently published cost-evaluations presenting originally developed data in rheumatic conditions. We identified 21 articles: 9 presenting original data on rheumatoid arthritis and/or osteoarthritis; 7 focusing on other musculoskeletal conditions such as back pain, scleroderma, Lyme disease, and fibromyalgia; and 5(More)
Since 1898 Mycoplasmas are known triggers of different diseases in various animal species. In man they can cause among others non-gonococcal urethritis. In addition they are discussed as triggering agents of arthritis. Besides septic arthritides in immunocompromised patients with hypogammaglobulinemia, they might be causative agents in sexually acquired(More)