5

The statistic is false, though there's something meaningful behind it. From Godar et al, 2003: Since 1986, people have been informed that they get about 80% of their lifetime ultraviolet (UV) dose by the age of 18. This belief originated from the mathematical conclusion that diligent use of sunscreens (sun protection factor 15 or higher) during the first 18 ...


4

You're thinking of it like "cumulative" + "lifetime incidence"; they're thinking of it as "cumulative incidence" and answering the question "cumulative incidence over what time period?" as "over the lifetime". "Lifetime cumulative incidence" might be a better way to write it from a statistical ...


2

Your analysis looks similar to: Incremental Cost-Effectiveness Ratio (ICER) which: ICER ... is used in cost-effectiveness analysis to summarise the cost-effectiveness of a health care intervention. It is defined by the difference in cost between two possible interventions, divided by the difference in their effect. In your case, because of your ...


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