Summary statistics for natl1996 dataset : by Jean Roth , jroth@nber.org , 22 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- datayear | 3894874 1996 0 1996 1996 rectype | 3894874 1.242408 .4285401 1 2 restatus | 3894874 1.26653 .4954489 1 4 recwt | 3894874 1 0 1 1 pldel | 3894874 1.02547 .2808538 1 9 -------------+-------------------------------------------------------- pldel3 | 3894874 1.010208 .1022663 1 3 birattnd | 3894874 1.20214 .6563563 1 9 regnocc | 3894874 2.661908 1.035064 1 4 divocc | 3894874 5.251583 2.559411 1 9 stsubocc | 3894874 56.10218 25.89853 11 95 -------------+-------------------------------------------------------- stnatexp | 0 statenat | 0 cntynat | 0 stoccfip | 0 cntocfip | 0 -------------+-------------------------------------------------------- cntocpop | 0 regnres | 3894874 2.658842 1.03812 0 4 divres | 3894874 5.244283 2.564389 0 9 stsubres | 3894874 56.02548 25.95353 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 | 201126 1 0 1 1 mageimp | 0 dmage | 3894874 26.94817 6.143202 10 49 mage36 | 3894874 13.94879 6.141824 1 36 -------------+-------------------------------------------------------- mage12 | 3894874 8.816036 1.658116 1 13 mage8 | 3894874 3.990609 1.262402 1 8 ormoth | 3894874 .4552979 1.37233 0 9 orracem | 3894874 5.533045 1.94649 1 9 mraceimp | 0 -------------+-------------------------------------------------------- mrace | 3894874 2.554479 9.077403 1 78 mrace3 | 3894874 1.357779 .7315985 1 3 dmeduc | 3894874 13.92886 10.60081 0 99 meduc6 | 3894874 3.415176 1.202793 1 6 dmarimp | 0 -------------+-------------------------------------------------------- dmar | 3894874 1.323733 .4678997 1 2 mplbir | 3894874 31.89051 18.42948 1 99 mplbirr | 3894874 1.196714 .4039037 1 3 dmagerpt | 3894874 95.26983 16.04436 12 99 adequacy | 3894874 1.443442 .8080256 1 4 -------------+-------------------------------------------------------- nlbnl | 3894874 1.430794 6.451595 0 99 nlbnd | 3894874 .5935879 7.514469 0 99 noterm | 3894874 1.06123 8.212202 0 99 dlivord | 3894874 2.617224 7.571513 1 99 livord9 | 3894874 2.074768 1.319431 1 9 -------------+-------------------------------------------------------- dtotord | 3894874 3.215772 8.891254 1 99 totord9 | 3894874 2.455244 1.604566 1 9 monpre | 3894874 5.006336 15.40493 0 99 mpre6 | 3894874 1.72724 1.138464 1 6 mpre5 | 3894874 1.331218 .810441 1 5 -------------+-------------------------------------------------------- nprevis | 3894874 14.5985 16.62391 0 99 nprev12 | 3894874 7.085002 2.065669 1 12 lmpmon | 3894874 10.95669 19.85963 1 99 lmpday | 3894874 25.95709 29.22765 1 99 lmpyr | 3894874 2374.573 1700.637 1995 9999 -------------+-------------------------------------------------------- flgbwimp | 0 bwimp | 4830 5924.993 3846.198 227 9999 fagerflg | 164203 1 0 1 1 dfage | 3894874 40.25897 25.21658 10 99 fage11 | 3894874 5.559612 2.592601 1 11 -------------+-------------------------------------------------------- orfath | 3894874 1.674534 3.249816 0 9 orracef | 3894874 5.989021 2.192121 1 9 frace | 3894874 16.85843 35.32107 1 99 frace4 | 3894874 1.693722 1.144027 1 4 dfagerpt | 3894874 96.0959 13.90886 14 99 -------------+-------------------------------------------------------- fraceimp | 10928 3 0 3 3 cdobmimp | 2 1 0 1 1 birmon | 3894874 6.559382 3.416733 1 12 biryr | 3894874 1996 0 1996 1996 weekday | 3894874 4.046204 1.880621 1 7 -------------+-------------------------------------------------------- gestestm | 184697 1 0 1 1 gestimp | 309008 1 0 1 1 dgestat | 3894874 39.57158 6.641974 17 99 gestat10 | 3894874 6.569951 1.343822 1 10 gestat3 | 3894874 1.901737 .3309082 1 3 -------------+-------------------------------------------------------- cseximp | 68 1 0 1 1 csex | 3894874 1.488505 .4998679 1 2 dbirwt | 3894874 3333.397 649.7617 227 9999 birwt12 | 3894874 7.156218 1.252679 1 12 birwt4 | 3894874 2.913717 .3298105 1 4 -------------+-------------------------------------------------------- plurimp | 444 1 0 1 1 dplural | 3894874 1.029125 .1792147 1 5 fmaps | 3894874 29.52479 37.83214 0 99 fmapsr | 3894874 4.137008 .5809572 1 5 clingest | 3894874 47.71281 21.44961 17 99 -------------+-------------------------------------------------------- vaginal | 3894874 1.273221 .8231903 1 9 vbac | 3894874 2.030072 .6693989 1 9 primac | 3894874 1.93047 .7374051 1 9 repeac | 3894874 1.984515 .7030763 1 9 forcep | 3894874 2.028438 .6706896 1 9 -------------+-------------------------------------------------------- vacuum | 3894874 1.998541 .6932011 1 9 delmeth5 | 3894874 1.548966 1.030195 1 5 anemia | 3894874 2.073854 .8163775 1 9 cardiac | 3894874 2.088284 .806041 1 9 lung | 3894874 2.085003 .8084257 1 9 -------------+-------------------------------------------------------- diabetes | 3894874 2.067321 .8209309 1 9 herpes | 3894874 2.591805 1.829957 1 9 hydra | 3894874 2.080936 .8113533 1 9 hemo | 3894874 2.092457 .8029788 1 9 chyper | 3894874 2.086489 .8073483 1 9 -------------+-------------------------------------------------------- phyper | 3894874 2.057849 .8273962 1 9 eclamp | 3894874 2.08973 .8049836 1 9 incervix | 3894874 2.0907 .8042721 1 9 pre4000 | 3894874 2.082392 .8103086 1 9 preterm | 3894874 2.081696 .8108083 1 9 -------------+-------------------------------------------------------- renal | 3894874 2.185203 1.090985 1 9 rh | 3894874 2.145634 .9959353 1 9 uterine | 3894874 2.593379 1.829018 1 9 othermr | 3894874 1.94927 .8910314 1 9 tobacco | 3894874 3.349569 2.913311 1 9 -------------+-------------------------------------------------------- cigar | 3894874 22.27699 40.14268 0 99 cigar6 | 3894874 1.495803 2.442529 0 6 alcohol | 3894874 3.065922 2.533672 1 9 drink | 3894874 15.62175 36.0605 0 99 drink5 | 3894874 .8033487 1.825708 0 5 -------------+-------------------------------------------------------- wtgain | 3894874 45.06791 30.26707 0 99 wtgain9 | 3894874 5.325235 2.675732 1 9 amnio | 3894874 2.026096 .6620453 1 9 monitor | 3894874 1.23999 .8046588 1 9 induct | 3894874 1.890189 .7502224 1 9 -------------+-------------------------------------------------------- stimula | 3894874 1.890585 .7500165 1 9 tocol | 3894874 2.036646 .6535232 1 9 ultras | 3894874 1.444367 .9146914 1 9 otherob | 3894874 1.989153 .6897904 1 9 febrile | 3894874 2.059961 .7370536 1 9 -------------+-------------------------------------------------------- meconium | 3894874 2.018424 .7668378 1 9 rupture | 3894874 2.046792 .7468754 1 9 abruptio | 3894874 2.070184 .7291739 1 9 preplace | 3894874 2.072533 .727331 1 9 excebld | 3894874 2.248348 1.242628 1 9 -------------+-------------------------------------------------------- seizure | 3894874 2.075434 .7250376 1 9 precip | 3894874 2.055905 .7401172 1 9 prolong | 3894874 2.066999 .7316528 1 9 dysfunc | 3894874 2.048692 .74548 1 9 breech | 3894874 2.038231 .7530682 1 9 -------------+-------------------------------------------------------- cephalo | 3894874 2.052707 .7425085 1 9 cord | 3894874 2.073733 .7263848 1 9 anesthe | 3894874 2.592539 1.814451 1 9 distress | 3894874 2.555144 1.836449 1 9 otherlb | 3894874 1.935256 .8169186 1 9 -------------+-------------------------------------------------------- nanemia | 3894874 2.126192 .9360228 1 9 injury | 3894874 2.797192 2.07322 1 9 alcosyn | 3894874 2.232675 1.21317 1 9 hyaline | 3894874 2.120789 .9396149 1 9 meconsyn | 3894874 2.124843 .9369239 1 9 -------------+-------------------------------------------------------- venl30 | 3894874 2.310876 1.431206 1 9 ven30m | 3894874 2.32244 1.424592 1 9 nseiz | 3894874 2.12667 .9357028 1 9 otherab | 3894874 2.080524 .9650119 1 9 anen | 3894874 2.148325 1.008599 1 9 -------------+-------------------------------------------------------- spina | 3894874 2.148197 1.008682 1 9 hydro | 3894874 2.148181 1.008692 1 9 microce | 3894874 2.14837 1.00857 1 9 nervous | 3894874 2.14823 1.008661 1 9 heart | 3894874 2.147319 1.009245 1 9 -------------+-------------------------------------------------------- circul | 3894874 2.147104 1.009383 1 9 rectal | 3894874 2.148362 1.008576 1 9 tracheo | 3894874 2.148305 1.008612 1 9 omphalo | 3894874 2.148185 1.008689 1 9 gastro | 3894874 2.148126 1.008728 1 9 -------------+-------------------------------------------------------- genital | 3894874 2.147711 1.008994 1 9 renalage | 3894874 2.148319 1.008604 1 9 urogen | 3894874 2.147292 1.009263 1 9 cleftlp | 3894874 2.1476 1.009065 1 9 adactyly | 3894874 2.147616 1.009055 1 9 -------------+-------------------------------------------------------- clubfoot | 3894874 2.147878 1.008887 1 9 hernia | 3894874 2.148322 1.008602 1 9 musculo | 3894874 2.146452 1.009801 1 9 downs | 3894874 2.148019 1.008796 1 9 chromo | 3894874 2.148073 1.008761 1 9 -------------+-------------------------------------------------------- othercon | 3894874 2.143221 1.011862 1 9 origm | 3894874 .9991322 .0294458 0 1 origf | 3894874 .9991322 .0294458 0 1 educm | 3894874 .9991322 .0294458 0 1 educf | 3894874 0 0 0 0 -------------+-------------------------------------------------------- geste | 3894874 .8606373 .3463246 0 1 fmapsrf | 3894874 .775803 .4170524 0 1 delmetrf | 3894874 .9991322 .0294458 0 1 medrsk | 3894874 .9991322 .0294458 0 1 tobuse | 3894874 .8003001 .3997748 0 1 -------------+-------------------------------------------------------- alcuse | 3894874 .8579451 .3491065 0 1 wtgn | 3894874 .860634 .3463281 0 1 obstrc | 3894874 .9991322 .0294458 0 1 clabor | 3894874 .9991322 .0294458 0 1 abnml | 3894874 .9991322 .0294458 0 1 -------------+-------------------------------------------------------- congan | 3894874 .9921415 .0882994 0 1 educsmsa | 3894874 .818893 .3851069 0 1 apiflag | 3894874 .2950968 .4560863 0 1 smsares | 0 popsmas | 0 by Jean Roth , jroth@nber.org , 22 Dec 2015