Therapeutic Compliance and Its Related Factors of Lung Cancer Patients / 예방의학회지

OBJECTIVES: To investigate the therapeutic compliance and its related factors in lung cancer patients. METHODS: The subjects of this study comprised 277 patients first diagnosed with lung cancer at Kyungpook National University Hospital between Jan 1999 and Sept 1999. Of these, 141 (50.9%) participated in the study by properly replying to structured questionnaires. The data was analyzed using a simplified Health Decision Model. This model includes categories of variables covering therapeutic compliance, health beliefs, patient preferences, knowledge and experience, social interaction, sociodemographic and clinical characteristics. RESULTS: The therapeutic compliance rate of the 141 study subjects was 78.0%. An analysis of health beliefs and patient preferences revealed health concern (p<0.05), dependency on medicine (p<0.05), perceived susceptibility and severity (p<0.05) as well as preferred treatment (p<0.01) as factors related to therapeutic compliance. Factors from the sociodemographic characteristics and clinical factors that were related to therapeutic compliance were age (p<0.01), monthly income (p<0.05), histological type (p<0.05) and clinical stage (p<0.05) of cancer. CONCLUSIONS: In order to improve therapeutic compliance in lung cancer patients it is necessary to educate the aged, low-income patients, or patients who have small cell lung cancer or lung cancer of an advanced stage for which surgery is not indicated. Additionally, it is essential for medical personnel to have a deep concern about patients who have poor lifestyles, a low dependency on medicine, or a high perceived susceptibility and severity. Practically, early diagnosis of lung cancer and thoughtful considerations of low-income patients are important. By means of population-based education in a community, we may promote attention to health and enhance the early diagnosis of lung cancer.

The Prognostic role of electrocardiographic signs of cor pulmonale in chronic obstructive pulmonary disease / 결핵

BACKGROUND: In patients with chronic obstructive pulmonary disease(COPD), several factors have been associated with a poor prognosis. These include old age, low FEV, low diffusing capacity, high alveolar-arterial oxygen pressure difference, and finally cor pulmonale. This study was done to investigate in the ECG signs suggesting cor pulmonale were independent prognostic factors in patients with COPD. METHOD: We analyzed ECG, pulmonary function data and arterial blood gas values in 61 patients who were admitted through the emergency department with an acute exacerbation of COPD. The ECG signs reflecting cor pulmonale were right atrial overloading(RAO), right bundle branch block, right ventricular hypertrophy and low-voltage QRS. The 61 patients were divided into 2 groups, group I with no ECG signs(n=36) and group II with one or more ECG signs(n=25) suggesting cor pulmonale. RESULTS: Poor prognostic factors by univariate analysis were low FEV1, FEV1 % pred., VC% pred., DLco, DLco % pred., PaO2 and SaO2 high PaCO2 presence of ECG signs reflecting cor pulmonale, presence of mental status change, use of mechanical ventilator, and long tern use of glucocorticoid. A multivariate analysis indicated that age(risk ratio=1.13, 95% confidence interval 1.05~1.23), Dlco % pred. (risk ratio=0.97, 95% confidence interval 0.94~0.99), PaO2 (risk ratio=0.95, 95% confidence interval 0.90~0.99) and RAO(risk ratio=5.27, 95% confidence interval 1.40~19.85) were independent prognostic factors of survival. There was a significant difference in survival between the patients with and without RAO(p=0.038). The survival rates at 1, 2, and 5 years were 94.5%. 81.4%, and 50.0% in patients without RAO and 82.4%, 70.6%, and 27.5% in patients with RAO, respectively. CONCLUSION: These results suggest that the presence of ECG signs reflecting cor pulmonale is a predictor of survival and that RAO of these ECG signs is a significant independent predictor of survival in patients with COPD.

Changing Trends of Clinical Aspects in Lung Cancer from 1988 to 1996 - Hostipal Based Study / 대한암학회지

PURPOSE: Lung cancer is now one of the most frequently diagnosed cancers in the world and its incidence has been increasing also in Korea. In several recent studies, the indidence of adenocarcinoma and female/male ratio have been reported to be increasing. The aim of this study is to investigate the changing trends in sex and age distribution, the histologic type and location (peripheral or central) of tumors in lung cancer. MATERIALS AND METHODS: We performed the retrospective review of histopathology and clinical information of 1409 patients diagnosed as baving primary lung cancer, except non-epithelial tumors and undetermined histologic types, at Kyungpook National University Hospital from January 1988 to December 1996. RESULTS: Male to female ratio was 4.6; 1. The peak incidence of age group was 7th decade (40.3%) with mean age of 61.5. Percentage of smokers in patients with lung cancer was 84.3%. Total number of patients with lung cancer has increased recently. However, the annual female/male ratio was nearly constant during the study period. Peripheral tumors, which were found in 20.6% of patients with lung cancer in 1988, increased to 33.5% in 1996 and this trend was more prominent in squamous cell carcinoma than in adenocarcinoma. Squamous cell carcinoma was the most common histologic type (62.0%), followed by adenocarcinoma (19.2%), small cell carcinoma (14.2%), large cell carcinoma (4.6%) in order. There was a predominance of squamous cell carcinoma (67.9%) in males and of adenocarcinoma (46.6%) in females. There has been a significant shift in the histology pattern with an increase in the percentage of adenocarcinoma. The incidence of adenocarcinoma was more than doubled from 7.5% in 1988 to 25.8% in 1996. CONCLUSION: These findings suggest that the epidemiology of lung cancer is changing.

A Clinical Review of Mucoepidermoid Carcinoma of The Lung in Korea / 결핵

BACKGROUND: Mucoepidermoid carcinoma of the lung arises from submucosal gland of tracheobronchial tree. Histologically, the tumor is composed of mucin-secreting cells, squamous cells, and intermediated cells, which show no particular differentiating characteristics, in varying proportions. The tumor is divided into low grade and high grade depending on the proportion of cells, and the degree of the mitotic activity, cellular necrosis and nuclear pleomorphism. While favorable prognosis of low grade tumor, high grade tumor, which is very difficult to differentiate from adenosquamous carcinoma, has an aggressive clinical course. The tumor is rare, comprising 0.1 to 0.2% of primary lung cancers and 1 to 5% of bronchial adenomas. METHOD: A retrospective clinical study was done on 17 cases of mucoepidermoid carcinoma. The study investigated the clinical features, radiologic findings, bronchoscopic findings, histology and clinical courses. RESULTS: Age ranged between second to seventh decade with a mean age of 42 years. Twelve out of 17 cases were male. Five out of 17 cases were smokers with a mean 11 pack-years. Common symptoms included dyspnea, cough, hemoptysis, and wheezing. Two out of 17 cases was asymptomatic. Atelectasis or mass was common radiologic finding. Plain chest radiography was normal in one patient whom the tumor was located in upper trachea. Bonchoscopy revealed exophytic mass in 12 cases and nodular infiltrations in 4 cases. One case having solitary pulmonary nodule in the right lower lung was normal on bronchoscopy. Histologically, ten out of 17 cases were low grade, and seven out of 17 cases were high grade. Among 10 patients with low grade tumor, 9 patients were performed operation and have been alive without recurrence during a mean follow-up of 30 months. Two out of 7 patients with high grade tumor were performed pneumonectomy and have been alive during a follow-up of 3 and 8 months, respectively. CONCLUSION: Most of mucoepidermoid carcinoma is located at central airway and is presented symptoms by mucosal irirtation. Although atelectasis or mass is common radiologic finding, chest X-ray can be normal. The histologic grading and the extent of tumor are two most important factors for prognosis.