PubMed Health⌕ Search

Biomedical subjects

K H Njoo

Publications and source records attributed to K H Njoo.

6 recordsLinked to original sources
PubMed2001

Measuring the sacral inclination angle in clinical practice: is there an alternative to radiographs?

BACKGROUND: In patients with low back pain (LBP) the position of the pelvis is often a focus of physical or manual therapy. The "gold standard" to determine sacral inclination is by radiograph, but methods to measure sacral inclination externally with an inclinometer have also been introduced. OBJECTIVE: To determine the validity of the inclinometer in measuring the sacral inclination in patients with LBP. SUBJECTS: Adult patients with LBP who were referred by the general practitioner to the hospital for radiograph examination of the lumbosacral spine were included. METHODS: Measurement of sacral inclination acquired with the inclinometer, simultaneous with the x-ray exposure, was compared with the "gold standard" measurement of sacral inclination on the radiograph. Regression analysis was used to define the measurement error. RESULTS: Of 50 consecutive patients with LBP, radiographs of 41 patients were useful for the required measurements on the radiograph. The mean difference between the radiographic and inclinometer method was 23.12 degrees. The measurement error was 8.26 degrees. Regression analyses showed poor correlation between both methods (r = 0.28). CONCLUSIONS: The method we used to measure sacral inclination with an inclinometer proved to be invalid.

Adult↗
PubMed2000

How do general practitioners manage hip problems in adults?

OBJECTIVE: To investigate the medical management, and its consistency and determinants, of hip problems in adult patients. SETTING: General practice, The Netherlands. DESIGN: Observational study based on four "paper patients" and on computerised patients records (CPRs) of 400 patients (20 per general practitioner), aged 50 years and over, with new hip problems. SUBJECTS: 20 general practitioners. MAIN OUTCOME MEASURES: Examination, diagnosis and treatment of hip patients. RESULTS: Medical history and physical examination consisted mainly of questions concerning pain localisation and onset, and examining passive hip motion. The paper patients, except for the one with alarming symptoms, and the CPRs showed high variation in management between general practitioners, particularly for medication prescription and X-ray requests. Main factors influencing medical management were patients' age, number of visits and attitude of the individual general practitioner. A specific diagnosis was registered for only 32% of the 400 patients. The diagnosis osteoarthritis varied greatly between general practitioners even after adjustment for patients' age, gender and number of visits. Patients with osteoarthritis were infrequently referred to physical therapy and received nonsteroidal anti-inflammatory drugs (NSAIDs) more often than paracetamol. CONCLUSION: Diagnosis and treatment of hip problems varies widely between general practitioners. Treatment of patients with osteoarthritis is inconsistent with published recommendations.

Aged↗
PubMed1999

Comparing the diagnostic accuracy of carbohydrate-deficient transferrin, gamma-glutamyltransferase, and mean cell volume in a general practice population.

In certain populations, the biological alcohol marker carbohydrate-deficient transferrin (CDT) is known to have a high diagnostic accuracy. The aim of this study was to compare the diagnostic accuracy of CDT, gamma-glutamyltransferase (gamma-GT), and mean cell volume (MCV) in a general practice population; more specifically, to ascertain whether CDT is a better tool than gamma-GT and MCV for (early) recognition of excessive alcohol use. To represent the general practice situation as realistically as possible, three different drinking patterns are defined: irregular excessive, regular excessive, and very excessive. From a sample of 524 men from seven general practices, sensitivity, specificity, and predictive values of the three markers for the three drinking patterns were compared, and receiver-operating characteristic analysis was used to compare differences between the markers. The results indicate that drinking patterns do influence the (difference in) diagnostic accuracy. CDT has a higher diagnostic accuracy for all three drinking patterns than gamma-GT and higher predictive values for hazardous [(ir)regular excessive] drinking patterns than MCV. However, receiver-operating characteristic analyses failed to demonstrate a significant difference between these patterns. It is concluded that the performance of all tests is too low to be useful for screening procedures in a general population; however, some tests may be useful for case finding. CDT seems to be the best alcohol marker available, although the difference between CDT and MCV is small.

Adolescent↗
PubMed1998

The specificity of the CDT assay in general practice: the influence of common chronic diseases and medication on the serum CDT concentration.

Early recognition of alcohol problems by general practitioners might be enhanced by the use of better alcohol markers. Several studies have revealed promising results for the carbohydrate-deficient transferrin (CDT) assay in certain populations. The aim of our study was to examine the specificity of the CDT assay in a general practice population. The main research question was whether common chronic diseases and/or the accompanying prescribed drugs have a negative influence on the specificity of the CDT assay. The 524 men who participated were selected from seven general practices and were suffering from one or more of the following diseases: hypertension, asthma/bronchitis, diabetes mellitus, adipositis/lipid metabolism disorder, angina pectoris, depression, and disorders of the digestive tract. None of the studied diseases or of the accompanying prescribed drugs had an influence on the specificity of the CDT assay. The overall specificity in this general practitioner population was 0.92. It can be concluded that the studied diseases do not bear an influence on the serum CDT concentration, and that, therefore, the CDT assay is a highly specific instrument for use in assessing alcohol consumption in general practice patients.

Adult↗
PubMed1995

Interobserver agreement on iliac crest pain syndrome in general practice.

OBJECTIVE: To investigate the degree of interobserver agreement on the iliac crest pain syndrome (ICPS) in patients with nonspecific low back pain in general practice. METHODS: Sixty-one patients with nonspecific low back pain were recruited by 11 general practitioners. All patients answered a questionnaire and underwent a standard examination. Each patient was examined by 2 independent observers. RESULTS: Kappa for ICPS was 0.57 (95% CI: 0.34-0.79). For the "localized tenderness" and "typical pain" criteria, kappa was 0.57 (95% CI: 0.40-0.73) and 0.66 (95% CI: 0.48-0.83), respectively. CONCLUSION: The presence of ICPS can be judged with good interobserver agreement. Clear definition of the diagnostic criteria and examining techniques, and multiple training sessions before and during the study are prerequisites. ICPS represents a group of patients with low back pain with the same symptoms and signs. A homogeneous group facilities studies on natural history, prognosis, and therapy.

Adult↗