Summary statistics for natl1997 dataset : by Jean Roth , jroth@nber.org , 22 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- datayear | 3884329 1997 0 1997 1997 rectype | 3884329 1.24481 .4299743 1 2 restatus | 3884329 1.268983 .4967351 1 4 recwt | 3884329 1 0 1 1 pldel | 3884329 1.025521 .2845799 1 9 -------------+-------------------------------------------------------- pldel3 | 3884329 1.010188 .1026231 1 3 birattnd | 3884329 1.209911 .645799 1 9 regnocc | 3884329 2.665272 1.029067 1 4 divocc | 3884329 5.254722 2.545513 1 9 stsubocc | 3884329 56.15303 25.75979 11 95 -------------+-------------------------------------------------------- stnatexp | 0 statenat | 0 cntynat | 0 stoccfip | 0 cntocfip | 0 -------------+-------------------------------------------------------- cntocpop | 3884329 2.720106 3.204911 0 9 regnres | 3884329 2.662072 1.032176 0 4 divres | 3884329 5.24718 2.550613 0 9 stsubres | 3884329 56.07379 25.8163 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 | 183437 1 0 1 1 mageimp | 0 dmage | 3884329 27.01201 6.172952 10 54 mage36 | 3884329 14.01259 6.171671 1 41 -------------+-------------------------------------------------------- mage12 | 3884329 8.833863 1.649214 1 14 mage8 | 3884329 4.002636 1.267286 1 9 ormoth | 3884329 .4556277 1.366379 0 9 orracem | 3884329 5.521817 1.963488 1 9 mraceimp | 0 -------------+-------------------------------------------------------- mrace | 3884329 2.607894 9.255255 1 78 mrace3 | 3884329 1.362626 .7348994 1 3 dmeduc | 3884329 14.002 10.67385 0 99 meduc6 | 3884329 3.43599 1.204486 1 6 dmarimp | 0 -------------+-------------------------------------------------------- dmar | 3884329 1.323891 .467959 1 2 mplbir | 3884329 31.92327 18.43717 1 99 mplbirr | 3884329 1.197782 .4042005 1 3 dmagerpt | 3884329 95.26786 16.04219 11 99 adequacy | 3884329 1.432299 .803939 1 4 -------------+-------------------------------------------------------- nlbnl | 3884329 1.431327 6.415944 0 99 nlbnd | 3884329 .5296588 7.08478 0 99 noterm | 3884329 1.025505 7.997796 0 99 dlivord | 3884329 2.560375 7.165161 1 99 livord9 | 3884329 2.0759 1.307874 1 9 -------------+-------------------------------------------------------- dtotord | 3884329 3.142932 8.460356 1 99 totord9 | 3884329 2.455511 1.595956 1 9 monpre | 3884329 4.971228 15.41965 0 99 mpre6 | 3884329 1.708401 1.136525 1 6 mpre5 | 3884329 1.324514 .8095037 1 5 -------------+-------------------------------------------------------- nprevis | 3884329 14.60036 16.4419 0 99 nprev12 | 3884329 7.117226 2.06529 1 12 lmpmon | 3884329 11.25286 20.46516 1 99 lmpday | 3884329 25.54712 28.80235 1 99 lmpyr | 3884329 2399.679 1750.953 1996 9999 -------------+-------------------------------------------------------- flgbwimp | 0 bwimp | 4038 5671.751 3881.564 227 9999 fagerflg | 151452 1 0 1 1 dfage | 3884329 40.1307 25.02545 10 99 fage11 | 3884329 5.553618 2.578645 1 11 -------------+-------------------------------------------------------- orfath | 3884329 1.676991 3.249173 0 9 orracef | 3884329 5.987043 2.198218 1 9 frace | 3884329 16.94521 35.37176 1 99 frace4 | 3884329 1.701406 1.145712 1 4 dfagerpt | 3884329 96.03124 14.05692 12 99 -------------+-------------------------------------------------------- fraceimp | 12008 3 0 3 3 cdobmimp | 1 1 . 1 1 birmon | 3884329 6.561276 3.418498 1 12 biryr | 3884329 1997 0 1997 1997 weekday | 3884329 4.050355 1.872208 1 7 -------------+-------------------------------------------------------- gestestm | 194867 1 0 1 1 gestimp | 277401 1 0 1 1 dgestat | 3884329 39.45397 6.50394 17 99 gestat10 | 3884329 6.518119 1.326654 1 10 gestat3 | 3884329 1.897432 .3344737 1 3 -------------+-------------------------------------------------------- cseximp | 62 1 0 1 1 csex | 3884329 1.488354 .4998644 1 2 dbirwt | 3884329 3326.665 644.0493 227 9999 birwt12 | 3884329 7.144545 1.253678 1 12 birwt4 | 3884329 2.911871 .3328227 1 4 -------------+-------------------------------------------------------- plurimp | 247 1 0 1 1 dplural | 3884329 1.030476 .1837188 1 5 fmaps | 3884329 29.26866 37.6732 0 99 fmapsr | 3884329 4.133579 .5802636 1 5 clingest | 3884329 47.39465 21.14971 17 99 -------------+-------------------------------------------------------- vaginal | 3884329 1.278495 .8423135 1 9 vbac | 3884329 2.034684 .6875092 1 9 primac | 3884329 1.934114 .7550508 1 9 repeac | 3884329 1.987181 .7219495 1 9 forcep | 3884329 2.035533 .6868482 1 9 -------------+-------------------------------------------------------- vacuum | 3884329 2.002384 .7114542 1 9 delmeth5 | 3884329 1.553288 1.03604 1 5 anemia | 3884329 2.065221 .7821004 1 9 cardiac | 3884329 2.080013 .7711946 1 9 lung | 3884329 2.075577 .774511 1 9 -------------+-------------------------------------------------------- diabetes | 3884329 2.059086 .7864973 1 9 herpes | 3884329 2.594377 1.832068 1 9 hydra | 3884329 2.07226 .7769646 1 9 hemo | 3884329 2.08434 .7679205 1 9 chyper | 3884329 2.078352 .7724407 1 9 -------------+-------------------------------------------------------- phyper | 3884329 2.048773 .7937275 1 9 eclamp | 3884329 2.081852 .7698079 1 9 incervix | 3884329 2.082516 .7693052 1 9 pre4000 | 3884329 2.074341 .7754276 1 9 preterm | 3884329 2.073257 .7762292 1 9 -------------+-------------------------------------------------------- renal | 3884329 2.178154 1.069427 1 9 rh | 3884329 2.13889 .9725326 1 9 uterine | 3884329 2.596201 1.830977 1 9 othermr | 3884329 1.927142 .8652778 1 9 tobacco | 3884329 3.319636 2.887145 1 9 -------------+-------------------------------------------------------- cigar | 3884329 21.74991 39.83328 0 99 cigar6 | 3884329 1.459044 2.424449 0 6 alcohol | 3884329 3.03922 2.505088 1 9 drink | 3884329 15.1627 35.62877 0 99 drink5 | 3884329 .7781462 1.803412 0 5 -------------+-------------------------------------------------------- wtgain | 3884329 44.82642 30.03068 0 99 wtgain9 | 3884329 5.321589 2.668661 1 9 amnio | 3884329 2.023655 .6393723 1 9 monitor | 3884329 1.227788 .7803284 1 9 induct | 3884329 1.871745 .7381176 1 9 -------------+-------------------------------------------------------- stimula | 3884329 1.881437 .7331557 1 9 tocol | 3884329 2.032023 .6324263 1 9 ultras | 3884329 1.415066 .8220694 1 9 otherob | 3884329 1.98078 .6722074 1 9 febrile | 3884329 2.057279 .722185 1 9 -------------+-------------------------------------------------------- meconium | 3884329 2.017345 .7513096 1 9 rupture | 3884329 2.044727 .7316996 1 9 abruptio | 3884329 2.067078 .7145166 1 9 preplace | 3884329 2.069551 .7125469 1 9 excebld | 3884329 2.067145 .7144631 1 9 -------------+-------------------------------------------------------- seizure | 3884329 2.072432 .7102345 1 9 precip | 3884329 2.052225 .7260574 1 9 prolong | 3884329 2.064331 .7166884 1 9 dysfunc | 3884329 2.045427 .7311774 1 9 breech | 3884329 2.034836 .7389599 1 9 -------------+-------------------------------------------------------- cephalo | 3884329 2.051849 .7263431 1 9 cord | 3884329 2.070737 .7115975 1 9 anesthe | 3884329 2.596167 1.818343 1 9 distress | 3884329 2.560289 1.839495 1 9 otherlb | 3884329 1.924819 .8072426 1 9 -------------+-------------------------------------------------------- nanemia | 3884329 2.147235 1.008782 1 9 injury | 3884329 2.707826 1.980837 1 9 alcosyn | 3884329 2.253 1.266797 1 9 hyaline | 3884329 2.142018 1.01211 1 9 meconsyn | 3884329 2.146093 1.009514 1 9 -------------+-------------------------------------------------------- venl30 | 3884329 2.326994 1.469985 1 9 ven30m | 3884329 2.338733 1.463318 1 9 nseiz | 3884329 2.147739 1.008459 1 9 otherab | 3884329 2.101907 1.036467 1 9 anen | 3884329 2.15317 1.02457 1 9 -------------+-------------------------------------------------------- spina | 3884329 2.153059 1.024641 1 9 hydro | 3884329 2.153041 1.024652 1 9 microce | 3884329 2.153231 1.024531 1 9 nervous | 3884329 2.153096 1.024617 1 9 heart | 3884329 2.152157 1.025215 1 9 -------------+-------------------------------------------------------- circul | 3884329 2.151936 1.025356 1 9 rectal | 3884329 2.153209 1.024545 1 9 tracheo | 3884329 2.153151 1.024582 1 9 omphalo | 3884329 2.153022 1.024664 1 9 gastro | 3884329 2.152993 1.024682 1 9 -------------+-------------------------------------------------------- genital | 3884329 2.152535 1.024974 1 9 renalage | 3884329 2.153159 1.024577 1 9 urogen | 3884329 2.152207 1.025183 1 9 cleftlp | 3884329 2.152481 1.025009 1 9 adactyly | 3884329 2.152457 1.025024 1 9 -------------+-------------------------------------------------------- clubfoot | 3884329 2.152715 1.02486 1 9 hernia | 3884329 2.15318 1.024563 1 9 musculo | 3884329 2.151268 1.02578 1 9 downs | 3884329 2.152869 1.024762 1 9 chromo | 3884329 2.15292 1.024729 1 9 -------------+-------------------------------------------------------- othercon | 3884329 2.147852 1.02794 1 9 origm | 3884329 .9991157 .0297244 0 1 origf | 3884329 .9991157 .0297244 0 1 educm | 3884329 .9991157 .0297244 0 1 educf | 3884329 0 0 0 0 -------------+-------------------------------------------------------- geste | 3884329 .8640041 .3427843 0 1 fmapsrf | 3884329 .7780185 .4155788 0 1 delmetrf | 3884329 .9991157 .0297244 0 1 medrsk | 3884329 .9991157 .0297244 0 1 tobuse | 3884329 .8042856 .3967497 0 1 -------------+-------------------------------------------------------- alcuse | 3884329 .8613794 .3455502 0 1 wtgn | 3884329 .8639984 .3427903 0 1 obstrc | 3884329 .9991157 .0297244 0 1 clabor | 3884329 .9991157 .0297244 0 1 abnml | 3884329 .9991157 .0297244 0 1 -------------+-------------------------------------------------------- congan | 3884329 .9921979 .0879844 0 1 educsmsa | 3884329 .8180883 .3857718 0 1 apiflag | 3884329 .4042438 .4907452 0 1 smsares | 0 popsmas | 0 by Jean Roth , jroth@nber.org , 22 Dec 2015