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Age at nearest birthday

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Age at nearest birthday  (AGE at nearest birthday)


Age1 is another fundamental characteristic of population structure (144-4). Generally it is expressed in years, or years and months, save in the case of very small children, where it may be given in months and days only, or in years and decimal fractions of years. Statisticians often round off the age to the number of complete years2 lived, and this is called age last birthday3. Where the fraction of the last complete year lived is counted as a whole year, as in some actuarial applications, we speak of age next birthday4. Occasionally age at nearest birthday5 is given, where the age is rounded to the nearest integer. The term exact age6 is used, particularly in life table calculations, to denote the date when an individual reaches his birthday. Thus, a man will reach exact age 25 on his 25th birthday, and a man aged 25 will be between exact age 25 and exact age 26.
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