Certain assumptions are made with the calculator. The calculator assumes that your responses will not change over time, except for age. On rare occasion, there may be a change in an individual’s neurologic status which could change the prediction.
The calculator will underestimate life expectancy when socioeconomic factors change favorably over time, including increases in education, hours working, and family income. For instance, if you are currently in school or planning on attending school, the
life expectancy estimate will increase as education increases. Similarly, if someone is not currently working and has a relatively low family income, then goes to work and income increases, the life expectancy estimate will increase.
On the other hand, the calculator will overestimate the life expectancy when socioeconomic factors change unfavorably over time. For instance, if someone is currently working and has a high family income, the calculator will likely overestimate life
expectancy because it assumes no decline in either hours per week spent working or income as individual’s age. More accurate estimates may be obtained by allowing changing assumptions, but that is beyond the purpose of this calculator.
here are ways to account for these types of changes, but it cannot be done simply within this type of calculator, so we are pointing out the limitations for you to keep in mind as your educational, employment, and family income may change.
Because of study limitations, the estimates related to some variables, including race-ethnicity, are based on rather small numbers. Estimates for those of Hispanic origin, as well as those who are of Asian, Native American, or other descent may be less
precise and higher than for white, non-Hispanic participants. The calculator is designed so that you can enter alternative responses for any item to see how much change there is in the life expectancy estimate.
Life expectancy estimates are only general estimates that vary from study to study and the number and type of characteristics used in the prediction.