-----------------------------------------------------------------------------------------------
momid                                                                               Mother's ID
-----------------------------------------------------------------------------------------------

                  type:  numeric (int)

                 range:  [39,20855]                   units:  1
         unique values:  200                      missing .:  0/1000

                  mean:   8372.23
              std. dev:   5979.16

           percentiles:        10%       25%       50%       75%       90%
                              1340      3515    6818.5   13531.5   17233.5

-----------------------------------------------------------------------------------------------
birthord                                                                            birth order
-----------------------------------------------------------------------------------------------

                  type:  numeric (byte)

                 range:  [1,5]                        units:  1
         unique values:  5                        missing .:  0/1000

            tabulation:  Freq.  Value
                           200  1
                           200  2
                           200  3
                           200  4
                           200  5

-----------------------------------------------------------------------------------------------
momage                                                               mother's current age (yrs)
-----------------------------------------------------------------------------------------------

                  type:  numeric (byte)

                 range:  [12,99]                      units:  1
         unique values:  29                       missing .:  0/1000

                  mean:    21.633
              std. dev:   5.86094

           percentiles:        10%       25%       50%       75%       90%
                                16        18        21        24        28

-----------------------------------------------------------------------------------------------
timesnc                                                                 years since first birth
-----------------------------------------------------------------------------------------------

                  type:  numeric (byte)

                 range:  [-8,81]                      units:  1
         unique values:  21                       missing .:  0/1000

                  mean:     4.088
              std. dev:   4.79555

           percentiles:        10%       25%       50%       75%       90%
                                 0         1         4         6         9

-----------------------------------------------------------------------------------------------
delwght                                   difference in weight for last- and first-born (grams)
-----------------------------------------------------------------------------------------------

                  type:  numeric (int)

                 range:  [-1551,2700]                 units:  1
         unique values:  140                      missing .:  0/1000

                  mean:    191.64
              std. dev:   642.306

           percentiles:        10%       25%       50%       75%       90%
                            -607.5      -195       164       482      1063

-----------------------------------------------------------------------------------------------
lowbrth                                                                birthweight < 3000 grams
-----------------------------------------------------------------------------------------------

                  type:  numeric (byte)

                 range:  [0,1]                        units:  1
         unique values:  2                        missing .:  0/1000

            tabulation:  Freq.  Value
                           629  0
                           371  1

-----------------------------------------------------------------------------------------------
bweight                                                                    birth weight (grams)
-----------------------------------------------------------------------------------------------

                  type:  numeric (int)

                 range:  [340,5018]                   units:  1
         unique values:  253                      missing .:  0/1000

                  mean:   3135.46
              std. dev:   580.122

           percentiles:        10%       25%       50%       75%       90%
                              2495      2835      3175      3487      3799

-----------------------------------------------------------------------------------------------
lastwght                                                            weight of last-born (grams)
-----------------------------------------------------------------------------------------------

                  type:  numeric (int)

                 range:  [1210,5018]                  units:  1
         unique values:  114                      missing .:  0/1000

                  mean:    3208.2
              std. dev:   578.336

           percentiles:        10%       25%       50%       75%       90%
                              2604    2847.5      3218      3555      3911

-----------------------------------------------------------------------------------------------
initage                                                       mother's age at first birth (yrs)
-----------------------------------------------------------------------------------------------

                  type:  numeric (byte)

                 range:  [12,32]                      units:  1
         unique values:  18                       missing .:  0/1000

                  mean:    17.545
              std. dev:   3.21999

           percentiles:        10%       25%       50%       75%       90%
                                15        15        17        18        22

-----------------------------------------------------------------------------------------------
initwght                                                           weight of first-born (grams)
-----------------------------------------------------------------------------------------------

                  type:  numeric (int)

                 range:  [815,4508]                   units:  1
         unique values:  107                      missing .:  0/1000

                  mean:   3016.55
              std. dev:   576.218

           percentiles:        10%       25%       50%       75%       90%
                            2275.5      2815      3051    3352.5      3600

-----------------------------------------------------------------------------------------------
cinitage                                                 mother's age at first birth (centered)
-----------------------------------------------------------------------------------------------

                  type:  numeric (float)

                 range:  [-5.545,14.455]              units:  .001
         unique values:  18                       missing .:  0/1000

                  mean:  -2.4e-08
              std. dev:   3.21999

           percentiles:        10%       25%       50%       75%       90%
                            -2.545    -2.545     -.545      .455     4.455