age groups

  1. L

    Direct standardization - age

    Hi I have data with 250 events during an 10-year period. I have calculated incidence rates based on the general population. I now want to standardize the annual IRs for age using a standard-population. My age groups are split in 10-yearinterval groups=9 groups. now when calculating the...
  2. D

    How to group variables for regression analysis?

    Hi all, Here's my problem: I have 6 variables: Sex (1,2), Age (18, 18, 19, 21, 25, 25, etc), and four variables describing physical parameters; W, X, Y are continuous (1.2323, .0423, etc), and Z is a mean with a standard deviation. FYI, these are bone measurements. These four variables...