Summary statistics for natl1998 dataset : by Jean Roth , jroth@nber.org , 22 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- datayear | 3945192 1998 0 1998 1998 rectype | 3945192 1.245712 .4305086 1 2 restatus | 3945192 1.269734 .4968569 1 4 recwt | 3945192 1 0 1 1 pldel | 3945192 1.025002 .2786342 1 9 -------------+-------------------------------------------------------- pldel3 | 3945192 1.01011 .1018819 1 3 birattnd | 3945192 1.218248 .6494297 1 9 regnocc | 3945192 2.667914 1.026414 1 4 divocc | 3945192 5.257701 2.537231 1 9 stsubocc | 3945192 56.19603 25.67926 11 95 -------------+-------------------------------------------------------- stnatexp | 0 statenat | 0 cntynat | 0 stoccfip | 0 cntocfip | 0 -------------+-------------------------------------------------------- cntocpop | 0 regnres | 3945192 2.664536 1.029683 0 4 divres | 3945192 5.24961 2.542461 0 9 stsubres | 3945192 56.11137 25.73783 0 95 stresexp | 0 -------------+-------------------------------------------------------- stateres | 0 cntyres | 0 cityres | 0 citrspop | 0 metrores | 0 -------------+-------------------------------------------------------- stresfip | 0 cntyrfip | 0 placefip | 0 cmsa | 0 smsarfip | 0 -------------+-------------------------------------------------------- cntrspop | 0 magerflg | 188102 1 0 1 1 mageimp | 0 dmage | 3945192 27.05391 6.190075 10 54 mage36 | 3945192 14.05445 6.188888 1 41 -------------+-------------------------------------------------------- mage12 | 3945192 8.847576 1.636339 1 14 mage8 | 3945192 4.008853 1.271162 1 9 ormoth | 3945192 .4428109 1.312372 0 9 orracem | 3945192 5.502315 1.970272 1 9 mraceimp | 0 -------------+-------------------------------------------------------- mrace | 3945192 2.617928 9.281925 1 78 mrace3 | 3945192 1.363248 .7352166 1 3 dmeduc | 3945192 14.11293 10.93382 0 99 meduc6 | 3945192 3.453257 1.205976 1 6 dmarimp | 0 -------------+-------------------------------------------------------- dmar | 3945192 1.328038 .4694987 1 2 mplbir | 3945192 31.98576 18.50535 1 99 mplbirr | 3945192 1.199819 .4062514 1 3 dmagerpt | 3945192 95.55851 15.43766 11 99 adequacy | 3945192 1.435546 .8127124 1 4 -------------+-------------------------------------------------------- nlbnl | 3945192 1.527544 7.048857 0 99 nlbnd | 3945192 .6665379 7.974539 0 99 noterm | 3945192 1.106829 8.497792 0 99 dlivord | 3945192 2.698375 7.986774 1 99 livord9 | 3945192 2.093021 1.329228 1 9 -------------+-------------------------------------------------------- dtotord | 3945192 3.264111 9.091941 1 99 totord9 | 3945192 2.467608 1.607618 1 9 monpre | 3945192 5.131131 15.9263 0 99 mpre6 | 3945192 1.707341 1.148724 1 6 mpre5 | 3945192 1.32808 .8227036 1 5 -------------+-------------------------------------------------------- nprevis | 3945192 14.71494 16.73915 0 99 nprev12 | 3945192 7.119821 2.06548 1 12 lmpmon | 3945192 11.44463 20.83401 1 99 lmpday | 3945192 25.58403 28.855 1 99 lmpyr | 3945192 2409.95 1769.76 1997 9999 -------------+-------------------------------------------------------- flgbwimp | 0 bwimp | 4640 5748.435 3875.067 227 9999 fagerflg | 153332 1 0 1 1 dfage | 3945192 40.10485 24.94443 11 99 fage11 | 3945192 5.554684 2.573085 1 11 -------------+-------------------------------------------------------- orfath | 3945192 1.655348 3.22524 0 9 orracef | 3945192 5.965954 2.208911 1 9 frace | 3945192 16.85622 35.27817 1 99 frace4 | 3945192 1.70379 1.144831 1 4 dfagerpt | 3945192 96.32735 13.35293 14 99 -------------+-------------------------------------------------------- fraceimp | 12199 3 0 3 3 cdobmimp | 0 birmon | 3945192 6.563372 3.419227 1 12 biryr | 3945192 1998 0 1998 1998 weekday | 3945192 4.050232 1.866613 1 7 -------------+-------------------------------------------------------- gestestm | 202989 1 0 1 1 gestimp | 276333 1 0 1 1 dgestat | 3945192 39.42568 6.598865 17 99 gestat10 | 3945192 6.490301 1.320728 1 10 gestat3 | 3945192 1.895533 .337714 1 3 -------------+-------------------------------------------------------- cseximp | 88 1 0 1 1 csex | 3945192 1.48847 .4998671 1 2 dbirwt | 3945192 3326.745 650.7907 227 9999 birwt12 | 3945192 7.143314 1.258681 1 12 birwt4 | 3945192 2.911084 .3350695 1 4 -------------+-------------------------------------------------------- plurimp | 156 1 0 1 1 dplural | 3945192 1.032138 .1892339 1 5 fmaps | 3945192 29.06489 37.54477 0 99 fmapsr | 3945192 4.131116 .5791108 1 5 clingest | 3945192 47.18435 20.99635 17 99 -------------+-------------------------------------------------------- vaginal | 3945192 1.284957 .8556473 1 9 vbac | 3945192 2.038426 .6989089 1 9 primac | 3945192 1.934157 .7680387 1 9 repeac | 3945192 1.988462 .7346977 1 9 forcep | 3945192 2.040847 .697037 1 9 -------------+-------------------------------------------------------- vacuum | 3945192 2.006206 .7225864 1 9 delmeth5 | 3945192 1.561896 1.043399 1 5 anemia | 3945192 2.07595 .8354212 1 9 cardiac | 3945192 2.09225 .8239457 1 9 lung | 3945192 2.087266 .8275055 1 9 -------------+-------------------------------------------------------- diabetes | 3945192 2.071165 .8386996 1 9 herpes | 3945192 2.610473 1.856594 1 9 hydra | 3945192 2.084447 .8294993 1 9 hemo | 3945192 2.096644 .8207695 1 9 chyper | 3945192 2.090498 .8252024 1 9 -------------+-------------------------------------------------------- phyper | 3945192 2.060353 .845962 1 9 eclamp | 3945192 2.094325 .8224506 1 9 incervix | 3945192 2.094741 .8221494 1 9 pre4000 | 3945192 2.086603 .8279756 1 9 preterm | 3945192 2.08543 .8288058 1 9 -------------+-------------------------------------------------------- renal | 3945192 2.09463 .82223 1 9 rh | 3945192 2.152031 1.017335 1 9 uterine | 3945192 2.612939 1.855116 1 9 othermr | 3945192 1.930986 .9186394 1 9 tobacco | 3945192 3.302307 2.871029 1 9 -------------+-------------------------------------------------------- cigar | 3945192 21.42489 39.63869 0 99 cigar6 | 3945192 1.436061 2.41315 0 6 alcohol | 3945192 3.023293 2.488053 1 9 drink | 3945192 14.90618 35.38163 0 99 drink5 | 3945192 .7641392 1.79077 0 5 -------------+-------------------------------------------------------- wtgain | 3945192 44.76848 29.93191 0 99 wtgain9 | 3945192 5.325737 2.670666 1 9 amnio | 3945192 2.037163 .6982557 1 9 monitor | 3945192 1.234118 .8398877 1 9 induct | 3945192 1.87522 .7970665 1 9 -------------+-------------------------------------------------------- stimula | 3945192 1.889674 .7901009 1 9 tocol | 3945192 2.043167 .6935955 1 9 ultras | 3945192 1.421793 .8774899 1 9 otherob | 3945192 1.994017 .7294189 1 9 febrile | 3945192 2.068465 .7717281 1 9 -------------+-------------------------------------------------------- meconium | 3945192 2.029149 .7991986 1 9 rupture | 3945192 2.0571 .7799722 1 9 abruptio | 3945192 2.078052 .7645738 1 9 preplace | 3945192 2.080443 .76276 1 9 excebld | 3945192 2.077704 .7648364 1 9 -------------+-------------------------------------------------------- seizure | 3945192 2.083245 .7606197 1 9 precip | 3945192 2.063317 .7754941 1 9 prolong | 3945192 2.075492 .7665026 1 9 dysfunc | 3945192 2.056531 .780378 1 9 breech | 3945192 2.045371 .7882179 1 9 -------------+-------------------------------------------------------- cephalo | 3945192 2.064467 .7746574 1 9 cord | 3945192 2.081603 .7618762 1 9 anesthe | 3945192 2.611915 1.841915 1 9 distress | 3945192 2.576728 1.862703 1 9 otherlb | 3945192 1.934378 .8544196 1 9 -------------+-------------------------------------------------------- nanemia | 3945192 2.166184 1.069607 1 9 injury | 3945192 2.730447 2.011337 1 9 alcosyn | 3945192 2.271751 1.313917 1 9 hyaline | 3945192 2.160959 1.072843 1 9 meconsyn | 3945192 2.16519 1.070225 1 9 -------------+-------------------------------------------------------- venl30 | 3945192 2.345126 1.509671 1 9 ven30m | 3945192 2.357027 1.502947 1 9 nseiz | 3945192 2.166698 1.069286 1 9 otherab | 3945192 2.122396 1.095665 1 9 anen | 3945192 2.166163 1.065991 1 9 -------------+-------------------------------------------------------- spina | 3945192 2.16605 1.066061 1 9 hydro | 3945192 2.166024 1.066078 1 9 microce | 3945192 2.166203 1.065966 1 9 nervous | 3945192 2.166052 1.06606 1 9 heart | 3945192 2.165087 1.066663 1 9 -------------+-------------------------------------------------------- circul | 3945192 2.164957 1.066743 1 9 rectal | 3945192 2.166171 1.065986 1 9 tracheo | 3945192 2.166137 1.066007 1 9 omphalo | 3945192 2.165967 1.066113 1 9 gastro | 3945192 2.165954 1.066121 1 9 -------------+-------------------------------------------------------- genital | 3945192 2.165519 1.066393 1 9 renalage | 3945192 2.166133 1.066009 1 9 urogen | 3945192 2.165218 1.066581 1 9 cleftlp | 3945192 2.165471 1.066423 1 9 adactyly | 3945192 2.165437 1.066444 1 9 -------------+-------------------------------------------------------- clubfoot | 3945192 2.165711 1.066273 1 9 hernia | 3945192 2.166129 1.066012 1 9 musculo | 3945192 2.163957 1.067366 1 9 downs | 3945192 2.165837 1.066194 1 9 chromo | 3945192 2.165928 1.066138 1 9 -------------+-------------------------------------------------------- othercon | 3945192 2.161034 1.069179 1 9 origm | 3945192 .9990776 .0303568 0 1 origf | 3945192 .9990776 .0303568 0 1 educm | 3945192 .9990776 .0303568 0 1 educf | 3945192 0 0 0 0 -------------+-------------------------------------------------------- geste | 3945192 .8668559 .3397304 0 1 fmapsrf | 3945192 .7800911 .4141848 0 1 delmetrf | 3945192 .9990776 .0303568 0 1 medrsk | 3945192 .9990776 .0303568 0 1 tobuse | 3945192 .8076124 .3941759 0 1 -------------+-------------------------------------------------------- alcuse | 3945192 .8642429 .3425305 0 1 wtgn | 3945192 .8668506 .3397362 0 1 obstrc | 3945192 .9990776 .0303568 0 1 clabor | 3945192 .9990776 .0303568 0 1 abnml | 3945192 .9990776 .0303568 0 1 -------------+-------------------------------------------------------- congan | 3945192 .9921532 .0882338 0 1 educsmsa | 3945192 .8178636 .3859569 0 1 apiflag | 3945192 .4248432 .4943192 0 1 smsares | 0 popsmas | 0 by Jean Roth , jroth@nber.org , 22 Dec 2015