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principles of epidemiologyin public health practice_part8

không có triệu chứng mà không có triệu chứng. tấn công tốc độ trong các hình thức đó các biện pháp tỷ lệ trong một phần dân số bình đẳng của những người kinh nghiệm một sự kiện y tế cấp tính trong một khoảng thời gian giới hạn (ví dụ, trong một dịch bệnh nào) tính toán như số lượng nhà ở của một vấn đề sức khỏe mới trong một ổ dịch | asymptomatic without symptoms. attack rate a form of incidence that measures the proportion of persons in a population who experience an acute health event during a limited period e.g. during an outbreak calculated as the number of new cases of a health problem during an outbreak divided by the size of the population at the beginning of the period usually expressed as a percentage or per 1 000 or 100 000 population see also incidence proportion . attack rate secondary a measure of the frequency of new cases of a disease among the contacts of known patients. attributable proportion see proportion attributable. attributable risk percent see proportion attributable. attribute a risk factor that is an intrinsic characteristic of the individual person animal plant or other type of organism under study e.g. genetic susceptibility age sex breed weight . axis one of the dimensions of a graph in a rectangular graph the x-axis is the horizontal axis and the y-axis is the vertical axis. B bar chart a visual display in which each category of a variable is represented by a bar or column bar charts are used to illustrate variations in size among categories. bar chart 100 component a stacked bar chart in which all bars or columns are the same length and the measured axis represents 0 -100 . bar chart deviation a bar chart displaying either positive or negative differences from a baseline. bar chart grouped a bar chart displaying quantities of two variables represented by adjoining bars or columns i.e. a group of categories of one variable separated by space between groups. bar chart stacked a bar chart displaying quantities of two variables represented by subdivided bars or columns the subdivisions representing the categories of one variable separated by space between bars or columns. bias a systematic deviation of results or inferences from the truth or processes leading to such systematic deviation any systematic tendency in the collection analysis interpretation publication or