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Thus, we categorized age as 0 4, 5 14, and 15 19 years.
In our analysis, we categorized age groups for breast cancer screening as follows: 16 to 49 (reference category), 50 to 64, 65 to 70, age 71 and over.
For the three latter countries, the information had to be derived from the categorized age and can therefore only be treated as proxy.
One study categorized age into five year intervals [ 41].
To examine physician age, we categorized age by decade.
Most approaches have categorized age, while some have treated it as a linear variable.
The ptrend values for MP and BP remained nonsignificant when the categorized age variable was included.
Substitution of continuous for categorized age also did not distort the point estimates.
We categorized age, education, work status, and household density (residents/room).
Mortality variables were stratified by sex and four categorized age groups: (0 4), (5 19), (20 59), and (60+).
Age-adjusted comparisons between sexes or SES categories were done by grouped Poisson regression with inclusion of categorized age.
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