Summary statistics for natl1999 dataset : by Jean Roth , jroth@nber.org , 22 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- datayear | 3963465 1999 0 1999 1999 rectype | 3963465 1.247652 .4316486 1 2 restatus | 3963465 1.271724 .4980734 1 4 recwt | 3963465 1 0 1 1 pldel | 3963465 1.023995 .2681704 1 9 -------------+-------------------------------------------------------- pldel3 | 3963465 1.009609 .0985378 1 3 birattnd | 3963465 1.223027 .6547118 1 9 regnocc | 3963465 2.672441 1.02346 1 4 divocc | 3963465 5.265429 2.529684 1 9 stsubocc | 3963465 56.28857 25.60561 11 95 -------------+-------------------------------------------------------- stnatexp | 0 statenat | 0 cntynat | 0 stoccfip | 0 cntocfip | 0 -------------+-------------------------------------------------------- cntocpop | 3963465 2.730137 3.201656 0 9 regnres | 3963465 2.668716 1.027026 0 4 divres | 3963465 5.256751 2.535256 0 9 stsubres | 3963465 56.19754 25.66845 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 | 189625 1 0 1 1 mageimp | 0 dmage | 3963465 27.09842 6.189369 10 54 mage36 | 3963465 14.09893 6.188231 1 41 -------------+-------------------------------------------------------- mage12 | 3963465 8.864587 1.620161 1 14 mage8 | 3963465 4.016996 1.272766 1 9 ormoth | 3963465 .4514386 1.3137 0 9 orracem | 3963465 5.473447 2.000122 1 9 mraceimp | 0 -------------+-------------------------------------------------------- mrace | 3963465 2.699327 9.518555 1 78 mrace3 | 3963465 1.361624 .7325914 1 3 dmeduc | 3963465 14.2016 11.16091 0 99 meduc6 | 3963465 3.467944 1.213055 1 6 dmarimp | 0 -------------+-------------------------------------------------------- dmar | 3963465 1.330345 .4703372 1 2 mplbir | 3963465 32.30144 18.68521 1 99 mplbirr | 3963465 1.208753 .4145631 1 3 dmagerpt | 3963465 95.35949 15.83959 12 99 adequacy | 3963465 1.439119 .8229136 1 4 -------------+-------------------------------------------------------- nlbnl | 3963465 1.397322 6.094181 0 99 nlbnd | 3963465 .4606913 6.593166 0 99 noterm | 3963465 .8934745 7.213821 0 99 dlivord | 3963465 2.497947 6.682301 1 99 livord9 | 3963465 2.077936 1.291174 1 9 -------------+-------------------------------------------------------- dtotord | 3963465 3.003379 7.648092 1 99 totord9 | 3963465 2.443663 1.570729 1 9 monpre | 3963465 5.224723 16.23538 0 99 mpre6 | 3963465 1.701616 1.153183 1 6 mpre5 | 3963465 1.327368 .8282157 1 5 -------------+-------------------------------------------------------- nprevis | 3963465 14.98367 17.30809 0 99 nprev12 | 3963465 7.146183 2.074366 1 12 lmpmon | 3963465 11.50547 20.93075 1 99 lmpday | 3963465 25.29403 28.55184 1 99 lmpyr | 3963465 2415.622 1779.081 1998 9999 -------------+-------------------------------------------------------- flgbwimp | 0 bwimp | 4819 6396.616 3932.293 227 9999 fagerflg | 155743 1 0 1 1 dfage | 3963465 39.86455 24.68155 10 99 fage11 | 3963465 5.534586 2.553726 1 11 -------------+-------------------------------------------------------- orfath | 3963465 1.627896 3.191096 0 9 orracef | 3963465 5.933417 2.232742 1 9 frace | 3963465 16.76294 35.14902 1 99 frace4 | 3963465 1.702323 1.141666 1 4 dfagerpt | 3963465 96.13926 13.78582 11 99 -------------+-------------------------------------------------------- fraceimp | 12992 3 0 3 3 cdobmimp | 22 1 0 1 1 birmon | 3963465 6.571488 3.414005 1 12 biryr | 3963465 1999 0 1999 1999 weekday | 3963465 4.058386 1.861603 1 7 -------------+-------------------------------------------------------- gestestm | 202499 1 0 1 1 gestimp | 262401 1 0 1 1 dgestat | 3963465 39.42757 6.756834 17 99 gestat10 | 3963465 6.471356 1.3167 1 10 gestat3 | 3963465 1.894477 .340704 1 3 -------------+-------------------------------------------------------- cseximp | 65 1 0 1 1 csex | 3963465 1.488086 .4998581 1 2 dbirwt | 3963465 3324.349 651.345 227 9999 birwt12 | 3963465 7.13839 1.257653 1 12 birwt4 | 3963465 2.910647 .3359053 1 4 -------------+-------------------------------------------------------- plurimp | 148 1 0 1 1 dplural | 3963465 1.032727 .1898392 1 5 fmaps | 3963465 29.03653 37.53 0 99 fmapsr | 3963465 4.131243 .5780566 1 5 clingest | 3963465 47.04738 20.90692 17 99 -------------+-------------------------------------------------------- vaginal | 3963465 1.285407 .8234037 1 9 vbac | 3963465 2.034595 .6620063 1 9 primac | 3963465 1.922369 .7386802 1 9 repeac | 3963465 1.978456 .7036503 1 9 forcep | 3963465 2.036224 .6606876 1 9 -------------+-------------------------------------------------------- vacuum | 3963465 2.008732 .6820817 1 9 delmeth5 | 3963465 1.574693 1.050986 1 5 anemia | 3963465 2.08991 .8964822 1 9 cardiac | 3963465 2.107613 .8845789 1 9 lung | 3963465 2.101828 .8885249 1 9 -------------+-------------------------------------------------------- diabetes | 3963465 2.085852 .8991389 1 9 herpes | 3963465 2.63269 1.88885 1 9 hydra | 3963465 2.099404 .8901622 1 9 hemo | 3963465 2.11191 .8816124 1 9 chyper | 3963465 2.105665 .885914 1 9 -------------+-------------------------------------------------------- phyper | 3963465 2.07514 .9060286 1 9 eclamp | 3963465 2.10968 .8831556 1 9 incervix | 3963465 2.109846 .8830413 1 9 pre4000 | 3963465 2.101951 .8884419 1 9 preterm | 3963465 2.100769 .8892416 1 9 -------------+-------------------------------------------------------- renal | 3963465 2.109922 .8829887 1 9 rh | 3963465 2.16803 1.068011 1 9 uterine | 3963465 2.635543 1.887137 1 9 othermr | 3963465 1.944774 .9766525 1 9 tobacco | 3963465 2.908655 2.528912 1 9 -------------+-------------------------------------------------------- cigar | 3963465 16.77436 35.98072 0 99 cigar6 | 3963465 1.146317 2.207335 0 6 alcohol | 3963465 3.024801 2.488286 1 9 drink | 3963465 14.89193 35.37055 0 99 drink5 | 3963465 .762287 1.789677 0 5 -------------+-------------------------------------------------------- wtgain | 3963465 44.64768 29.99906 0 99 wtgain9 | 3963465 5.31195 2.682736 1 9 amnio | 3963465 2.049299 .7432655 1 9 monitor | 3963465 1.24329 .887847 1 9 induct | 3963465 1.879823 .8425598 1 9 -------------+-------------------------------------------------------- stimula | 3963465 1.89808 .8340893 1 9 tocol | 3963465 2.052211 .7411045 1 9 ultras | 3963465 1.42425 .921105 1 9 otherob | 3963465 2.004882 .7741233 1 9 febrile | 3963465 2.076841 .8080733 1 9 -------------+-------------------------------------------------------- meconium | 3963465 2.038007 .8344318 1 9 rupture | 3963465 2.066687 .8152264 1 9 abruptio | 3963465 2.086409 .801157 1 9 preplace | 3963465 2.08881 .799394 1 9 excebld | 3963465 2.086427 .8011441 1 9 -------------+-------------------------------------------------------- seizure | 3963465 2.09163 .7973095 1 9 precip | 3963465 2.072312 .8112871 1 9 prolong | 3963465 2.084214 .8027591 1 9 dysfunc | 3963465 2.065262 .8162148 1 9 breech | 3963465 2.053567 .8241915 1 9 -------------+-------------------------------------------------------- cephalo | 3963465 2.073892 .8101705 1 9 cord | 3963465 2.090003 .7985139 1 9 anesthe | 3963465 2.628406 1.865448 1 9 distress | 3963465 2.593458 1.886145 1 9 otherlb | 3963465 1.944746 .8876536 1 9 -------------+-------------------------------------------------------- nanemia | 3963465 2.177177 1.103317 1 9 injury | 3963465 2.749134 2.034207 1 9 alcosyn | 3963465 2.283427 1.341902 1 9 hyaline | 3963465 2.172137 1.106394 1 9 meconsyn | 3963465 2.176294 1.103858 1 9 -------------+-------------------------------------------------------- venl30 | 3963465 2.354827 1.529239 1 9 ven30m | 3963465 2.365727 1.523095 1 9 nseiz | 3963465 2.177703 1.102993 1 9 otherab | 3963465 2.136446 1.127303 1 9 anen | 3963465 2.176231 1.097002 1 9 -------------+-------------------------------------------------------- spina | 3963465 2.176141 1.097057 1 9 hydro | 3963465 2.176127 1.097066 1 9 microce | 3963465 2.17628 1.096972 1 9 nervous | 3963465 2.176143 1.097056 1 9 heart | 3963465 2.17517 1.097655 1 9 -------------+-------------------------------------------------------- circul | 3963465 2.174967 1.09778 1 9 rectal | 3963465 2.17625 1.09699 1 9 tracheo | 3963465 2.176208 1.097016 1 9 omphalo | 3963465 2.176043 1.097118 1 9 gastro | 3963465 2.176047 1.097115 1 9 -------------+-------------------------------------------------------- genital | 3963465 2.175593 1.097395 1 9 renalage | 3963465 2.176204 1.097018 1 9 urogen | 3963465 2.175372 1.097531 1 9 cleftlp | 3963465 2.175549 1.097422 1 9 adactyly | 3963465 2.175481 1.097464 1 9 -------------+-------------------------------------------------------- clubfoot | 3963465 2.175794 1.097271 1 9 hernia | 3963465 2.17621 1.097015 1 9 musculo | 3963465 2.174001 1.098373 1 9 downs | 3963465 2.175894 1.097209 1 9 chromo | 3963465 2.175978 1.097158 1 9 -------------+-------------------------------------------------------- othercon | 3963465 2.17214 1.099513 1 9 origm | 3963465 .9989787 .0319419 0 1 origf | 3963465 .9989787 .0319419 0 1 educm | 3963465 .9989787 .0319419 0 1 educf | 3963465 0 0 0 0 -------------+-------------------------------------------------------- geste | 3963465 .8681616 .3383151 0 1 fmapsrf | 3963465 .7800407 .4142188 0 1 delmetrf | 3963465 .9989787 .0319419 0 1 medrsk | 3963465 .9989787 .0319419 0 1 tobuse | 3963465 .8655015 .3411871 0 1 -------------+-------------------------------------------------------- alcuse | 3963465 .8655015 .3411871 0 1 wtgn | 3963465 .8681568 .3383203 0 1 obstrc | 3963465 .9989787 .0319419 0 1 clabor | 3963465 .9989787 .0319419 0 1 abnml | 3963465 .9989787 .0319419 0 1 -------------+-------------------------------------------------------- congan | 3963465 .9921183 .0884286 0 1 educsmsa | 3963465 .0695591 .2544025 0 1 apiflag | 3963465 .4475279 .4972391 0 1 smsares | 0 popsmas | 0 by Jean Roth , jroth@nber.org , 22 Dec 2015