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       log:  \\Cronus\www\teaching\postreg\ExamE2005_codebook.txt
  log type:  text
 opened on:  13 Jun 2008, 08:56:25
file ExamE2005.dta saved

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age                                                       age of the mother in years
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                  type:  numeric (byte)

                 range:  [15,47]                      units:  1
         unique values:  33                       missing .:  0/15000

                  mean:   28.9843
              std. dev:   4.72787

           percentiles:        10%       25%       50%       75%       90%
                                23        26        29        32        35

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parity                                                                        Parity
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                  type:  numeric (byte)
                 label:  parity

                 range:  [1,3]                        units:  1
         unique values:  3                        missing .:  0/15000

            tabulation:  Freq.   Numeric  Label
                          6340         1  first birth
                          5526         2  second birth
                          3134         3  third or more

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preterm                                   the delivery before 260 days of gestation.
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                  type:  numeric (byte)
                 label:  yesno

                 range:  [0,1]                        units:  1
         unique values:  2                        missing .:  0/15000

            tabulation:  Freq.   Numeric  Label
                         14220         0  No
                           780         1  Yes

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smoking                                                     smoking during pregnancy
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                  type:  numeric (float)
                 label:  yesno

                 range:  [0,1]                        units:  1
         unique values:  2                        missing .:  0/15000

            tabulation:  Freq.   Numeric  Label
                         11110         0  No
                          3890         1  Yes

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id                                                                       (unlabeled)
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                  type:  numeric (float)

                 range:  [1,15000]                    units:  1
         unique values:  15000                    missing .:  0/15000

                  mean:    7500.5
              std. dev:   4330.27

           percentiles:        10%       25%       50%       75%       90%
                            1500.5    3750.5    7500.5   11250.5   13500.5
       log:  \\Cronus\www\teaching\postreg\ExamE2005_codebook.txt
  log type:  text
 closed on:  13 Jun 2008, 08:56:26
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