->  codebook


subject --------------------------------------------------------------- Subject
                  type:  string (str2)

         unique values:  8                    coded missing:  0 / 8

            tabulation:  Freq.  Value
                             1  "DG"
                             1  "DT"
                             1  "FP"
                             1  "JK"
                             1  "JM"
                             1  "JW"
                             1  "LK"
                             1  "MK"


age ----------------------------------------------------------------------- Age
                  type:  numeric (byte)

                 range:  [20,52]                      units:  1
         unique values:  7                    coded missing:  0 / 8

            tabulation:  Freq.  Value
                             2  20
                             1  21
                             1  37
                             1  39
                             1  41
                             1  42
                             1  52


signs --------------------------------------------- Syncopal signs: 0=no, 1=yes
                  type:  numeric (byte)

                 range:  [0,1]                        units:  1
         unique values:  2                    coded missing:  0 / 8

            tabulation:  Freq.  Value
                             3  0
                             5  1

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