Proportion Composing index, The relative frequency of every composition taking account of special factor, such as race, sex, age group in a whole group. 100 or eXample, sex proportion, race proportion, age proportion
11 Proportion • Composing index, The relative frequency of every composition taking account of special factor, such as race, sex, age group in a whole group. • For example, sex proportion, race proportion, age proportion. 100 i i f f
Homogenous in factors except for treatment Comparison of morbidity between two region Sex, age distribution should be equal significantl For the sex, age may be the factor that effect the mortality
12 Homogenous in factors except for treatment • Comparison of morbidity between two region. • Sex, age distribution should be equal significantly. • For the sex, age may be the factor that effect the mortality
Rate proportion The term rate is somewhat confusing sometimes it is use d interchangeably with the term p oportion; sometimes it refers to a quantity of a very different nature Sometimes, we focus on rates used interchangeably with proportions as measures of morbidity and mortality Even when they refer to th e same things- measures of morbidity and mortality -there is some degree of difference between these two terms. In contrast to the static nature of proportions, rates are aimed at measuring the occurrences of events during or after a certain time period
Rate & proportion • The term rate is somewhat confusing; sometimes it is use d interchangeably with the term p oportion; sometimes it refers to a quantity of a very different nature. • Sometimes, we focus on rates used interchangeably with proportions as measures of morbidity and mortality. • Even when they refer to th e same things — measures of morbidity and mortality —there is some degree of difference between these two terms. In contrast to the static nature of proportions, rates are aimed at measuring the occurrences of events during or after a certain time period . 13
Ratio-comparison index C, d the frequency or relative frequency of occurrence of some events or terms such as the person-doctor ratio, the person- hospital bed ratio K used in ratio are mostly 1 and 100
14 Ratio-comparison index • C,d the frequency or relative frequency of occurrence of some events or terms,such as the person-doctor ratio,the person-hospital bed ratio. • K used in ratio are mostly 1 and 100. c k d
Sex ratio in China in 2000 number of male 100 number of female =(65355 units/64228 units)X100=10674 1unit=10000万Wan)
15 Sex ratio in China in 2000 • ＝(65355units/64228 units)X100=106.74 • 1 unit=10,000 万 (wan) 100 number of male number of female