Cigarette Pack Years

Field Length:  3

Enter the total pack years for the span of cigarette use. Pack years equal the average number of packs smoked per day multiplied by the number of years of cigarette use. For example, if a person smokes two packs a day for 30 years, then the cigarette pack years equals 60.

            -  Enter "0" if patient never smoked cigarettes.

            -  Enter "999" if the pack years of cigarette use is unknown.

The computer will automatically right justify digits at data entry.