The hazard ratio for respiratory disease related mortality is set at 1.62 for every increase in one point in the BODE index. The hazard ratio for all cause mortality is set at 1.34 for every one increment increase in the index. The results are based on an original study of 207 patients with COPD and on subsequent validations. The following table presents the points awarded to each of the criteria choices. Results range from 0 to 10 and vary according to the criteria choices. Once the assessment is performed, each of the choices is awarded the corresponding number of points which in turn are summed to reveal the final score. Other observations include major weight loss, anemia and relevant reductions in lean body mass. Like other lung disease related indices, such as the CURB 65, it accounts for pulmonary and non pulmonary factors all together to predict survival. As this is amongst the most common causes of death after heart disease, stroke and cancer and a frequent comorbidity, significant progress has been done in trying to predict its outcomes. The BODE index is said to surpass even the results of spirometry testing (with the well known FEV1) in terms of outcome prediction and the progress monitoring of COPD. ■ Exercise capacity - the test of the distance walked in six minutes. Grade 4: Too breathless to leave the house or I am breathless when dressing. Grade 3: Stop for breath after walking about 100 meters or after a few minutes at my own pace on the level. Grade 2: Slower than most people of the same age on the level because of breathlessness or have to stop for breath when walking at my own pace on the level. Grade 1: Short of breath when hurrying on the level or walking up a slight hill. Grade 0: Breathless only with strenuous exercise. ■ Dyspnea - based on the modified MRC dyspnea scale. Stage 1 - mild: 64% or above (other symptoms are required to put a diagnosis). It concerns the biggest amount of air that can breathed out during the first second of expiration. ■ Obstruction of airflow - represented by the FEV1 variable (the forced expiratory volume in one second). ■ Body mass index - BMI result, as a variable dependant on the height and weight of the patient. This BODE index for COPD calculator takes into account the major factors of influence and the system nature of the disease and comprises of the following: This health tool is based on the multidimensional scoring system, the Body mass index, Obstruction, Dyspnea and Exercise Index and helps in the diagnosis of chronic obstructive pulmonary disease and in predicting the long term outcome of patients suffering from it.
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How does this BODE index for COPD calculator work?