BACKGROUND: Statistical errors have been noted in a large percentage of articles appearing in medical journals. Their incidence in the Annals of Dermatology and the Korean Journal of Dermatology, however, has not been studied. OBJECTIVE: The purpose of this study was to evaluate the accuracy of statistical methods in the Annals of Dermatology and the Korean Journal of Dermatology. METHOD: Original papers using the t test in the Annals of Dermatology(AD) and in the Korean Journal of Dermatology(KJD) from January 1990 to July 1994 were analyzed for correctness of statistical methods. RESULTS: Of the 376 original papers in the period considered, 78(20.7%) presented t tests and 43(55.1%) of these also contained some errors. Of the 9 papers from the Annals of Dermatology, 4(44.4%) included at least one error. Of the 69 papers from the Korean Journal of Dermatology, 39(56.5%) included at least one error. CONCLUSION: Misuse of statistical methodology may not be uncommon in the two Korean Dermatology journals, and it would be prudent to give more attention to statistical methodology.
Dermatology* ; Incidence ; Methods

Some of the techniques for bone grafting for delayed union or nonunion of the long bone are used currently. In 1991, at arthroscopy workshop in Phoenix, Arizona, Lanny L. Johnson, M.D. reported a case of endoscopic bone grafting for the delayed union on the humerus. He suggested the possibilities of endoscopic bone grafting such as minimal incision, magnified visualization, accurate debridement, accurate graft placement, vascular preservation, outpatient surgery and reduced cost. The author performed endoscopic bone grafting and extra-articular adhesionlysis on the delayed union of femur with extra-articular ankylosis. The patient was a 28 year old housewife with blood type Rh(-). The duration after initial operation was more than 9 months. The result of the graft was satisfactory. In the future endoscopic bone grafting could be performed for nonunion, delayed union and congenital bone defect.
Ambulatory Surgical Procedures ; Ankylosis ; Arizona ; Arthroscopy ; Bone Transplantation ; Debridement ; Education ; Femur ; Humans ; Humerus ; Transplants

To elucidate the clinical avaiability of FNAB, we reviewed retrospectively medical records of 30 patients who had infiltrative pulmonary lesion or pulmonary nodule or mediastinal mass, and got percutaneous fine needle aspiration biopsy using Westcott needle, 20~22 gauge, at the department of Pediatrics, Hanyang university hospital from July, 1986 to June, 1993. The obtained results were as follows: 1) There were 30 patients, aged 6 months to 15 years. 2) There were 17 male patients and 13 female patients with sex ratio of 1.3:1 3) Among 30 cases, we discovered 16 cases of infiltrative lesions, 7 cases of pulmonary nodules and 7 cases of mediastinal mass lesions. In mediastinal there were 4 cases of anterior mediastinum and 3 cases of posterior mediastinum. 4) Overall success rate on fine needle aspiration biopsy was 60% (18/30). The success rate was 50% (8/16) in infiltrative lesions, 50% (8/15) in pulmonary nodules and 71% (5/7) in mediastinal mass lesions, respectively. 5) Eight infiltrative lesione were diagnosed as Pneumocystis carinii pneumonia. Five pulmonary nodules were diagnosed as aspergillosis (2 cases), tuberculosis (1 case), mucormycosis (1 case), lung metastasis of metastasis of neuroblastoma (1 case). Five mediastinal mass lesions were diagnosed as teratoma (2 cases), lymphoma (1 case), malignant neurogenic tumor (1 case), ganglioneuroblastoma (1 case). 6) The complications occured in 20% (6 cases) among 30 procedures. All cases were due to pneumothorax: 3 cases spontaneously resolved, and 3 cases needed chest tube insertion. There were no death related with this procedures.
Aspergillosis ; Biopsy* ; Biopsy, Fine-Needle* ; Chest Tubes ; Child* ; Diagnosis* ; Female ; Ganglioneuroblastoma ; Humans ; Lung ; Lymphoma ; Male ; Mediastinum ; Medical Records ; Mucormycosis ; Needles ; Neoplasm Metastasis ; Neuroblastoma ; Pediatrics ; Pneumonia, Pneumocystis ; Pneumothorax ; Retrospective Studies ; Sex Ratio ; Teratoma ; Tuberculosis

A statistical survey was made on 729 inpatients during the period of 4 years and 9 months, 1961-1965, in the Department of Urology, The First Army Hospital, in reference to age distribution, monthly distribution on various diseases of the genitourinary tracts and operative procedures.The tables in the text represent the result of the observation and are summarized as follows: The majority of the patients (85%) was distributed between the ages 21 and 26. Of 729 in patients, there were 270 cases (37%) of genito-urinary tuberculosis, 84 cases (11.5%) of urinary calculus,69 cases of trauma and 60 cases of non-specific urinary tract infection. There were 379 operative procedures including 91 nephrectomies, and 108 epididiymectomies.
Age Distribution ; Hospitals, Military ; Humans ; Inpatients* ; Nephrectomy ; Surgical Procedures, Operative ; Tuberculosis ; Urinary Tract Infections ; Urology

To evaluate the typical appearance and the influence in the image interpretation of the metallic artifact which is known as one of the patient-related field artifacts, we analysed the magnetic resonance (MR) images of 40 patients (the total number of metallic materials were 45) acquired at MR 1.5T unit. All patients were screened for the presence of metal. The metallic implants were surgical wires and clips, orthopedic devices, and the other miscellaneous materials. The artifacts produced by metallic objects can be seen on MRI as the focal loss of signal and/or the local distortion of the image. Regardless of their ferromagnetic properties, metallic implants created regional artifacts in their images. Ferromagnetic materials, such as a lead fragment, showed severe artifacts and nonferromagnetic metals showed mild to moderate artifacts. The conspicuity of artifact was related tot he composition, mass, shape, orientation, and the location of the metallic objects in the body. Under high magnetic field strength, there were no significant differences between the various pulse sequences. Artifacts are particularly prominent on gradient-echo images. Our findings indicate that MR imaging of patients with standard nonferromagnetic metallic materials can be successfully performed and usefully interpretated.
Artifacts* ; Humans ; Magnetic Fields ; Magnetic Resonance Imaging* ; Magnets ; Metals ; Orthopedics

We have reported general principles of low vision aid prescription. But, we have not reported near vision aid prescription only. So, we analyse prescriptions of near low vision aid(diagnosis, type, magnification, etc) and present new near low vision aids that patients feels comfortable. We reviewed the clinical records of 100 patients who visited our low vision clinic more than twice and was prescribed near low vision aid for low vision. According to the data analysed, optic nerve atrophy was the most common etiology for low vision. Illuminated hand held magnifier(31.3%), telemicroscope with plus cap(27.7%), aspheric doublet sens(Clear Image II)(24.1%) were low vision aids most commonly used for near vision, but we knew new trend that newly prescribed aids(telemicroscope with plus cap, aspheric doublet lens) were prescribed more than illuminated hand held magnifier. After prescription of the low vision aid, visual acuity improved significantly (p<0.05). We examined contrast sensitivity test to measure the functional acuity and predict the visual prognosis after prescription of low visio aid.In addition,we studied the relationship between reading speed and the degree of contrast sensitivity and we knew that the relationship between degree of contrast sensitivity and reading speed was associated(p<0.05). Majority of patients(89%) were benefited from prescribed low vision aids.
Atrophy ; Audiovisual Aids ; Contrast Sensitivity ; Hand ; Humans ; Optic Nerve ; Prescriptions* ; Prognosis ; Vision, Low*

BACKGROUND: As co-factors of metalloenzymes, zinc(Zn) and copper(Cu) have a considerable effect on nearly all the metabolism that takes place in organs of the body, including the skin. OBJECTIVE: The purpose of this study was to evaluate zinc and copper status in alopecia areata patients. METHODS: We measured serum levels of zinc and copper in 30 cases of alopecia areata patients and 10 normal individuals by atomic absorption spectrometry. Furthermore, we studied the significance of the ratio between serum levels of the two metals. RESULTS: The serum levels of zinc were significantly lower in alopecia areata patients than in healthy controls. The serum levels of copper were slightly lower in alopecia areata patients than in healthy controls. Ratios of Cu/Zn were slightly higher in alopecia areata patients than in healthy controls. But their differences were not statistically significant. CONCLUSION: We suggest that a serum Zn assay should be included in the chemical assessment of patients with alopecia areata.
Absorption ; Alopecia Areata* ; Alopecia* ; Copper* ; Humans ; Metabolism ; Metals ; Skin ; Spectrum Analysis ; Zinc*

No abstract available.
Fistula*

The Klinefelter's syndrome is characterized by azoospermia, gynecomastia, a variable degree of eunuchoidism elevated urinary gonadotropins, atrophic testis and hyalinization of the seminiferous tubules in which Leydig cells were preserved. Reviewing some world literatures, we have reported a case of Klinefelter's syndrome associated with right inguinal hernia in 22 year-old Korean male.
Azoospermia ; Eunuchism ; Gonadotropins ; Gynecomastia ; Hernia, Inguinal ; Humans ; Hyalin ; Klinefelter Syndrome* ; Leydig Cells ; Male ; Seminiferous Tubules ; Testis ; Young Adult

PURPOSE: The purpose of this study is to explore what the students experienced in short filmmaking class performed to 1st grade premedical students of a medical school, and to trace educational effects of the class. METHODS: Taking a qualitative approach, the authors used semi-structured interviews to collect the data. This study employed the quota sampling method to purposefully select students to interview. Data coding and analysis were performed based on the grounded theory. The filmmaking experiences consistently described by the interviewees were labeled and reorganized into categories through the open, axial, and selective coding. RESULTS: The students experience the group filmmaking class as a participatory class. Learners also experienced the procedure of performing complicated group tasks according to detailed and scheduled processes. Participation leads to collaboration. Collaboration here is through communication and participation, not through mechanical cooperation. Students also experience various dimensions of communication. The students learned that successful performance of the group filmmaking process is enabled through consideration towards others, and experience a sense of connectedness resulting in a type of community spirit. Having fun and interest, finally, the students experience the sense of accomplishment and sharing through joint screening. CONCLUSION: Students' shared experiences and their education effects of the filmmaking class can be explained in terms of the above mentioned seven closely intertwined categories. In this class, the students were able to express emotions they would not normally express. Through this, the students were able to find the true character and new aspects of their fellow students, forming intimacy, which led to a sense of belonging and connectedness.
Clinical Coding ; Cooperative Behavior ; Education ; Education, Medical, Undergraduate ; Grounded Theory ; Humans ; Joints ; Mass Screening ; Methods ; Motion Pictures as Topic ; Schools, Medical ; Students, Medical ; Students, Premedical