Summary statistics for natl1990 dataset : by Jean Roth , jroth@nber.org , 3 Jan 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- datayear | 4,162,917 1990 0 1990 1990 rectype | 4,162,917 1.233624 .4231356 1 2 restatus | 4,162,917 1.2597 .4966587 1 4 recwt | 4,162,917 1 0 1 1 pldel | 4,162,917 1.0312 .3218903 1 9 -------------+--------------------------------------------------------- pldel3 | 4,162,917 1.012509 .1146339 1 3 birattnd | 4,162,917 1.173886 .7377192 1 9 regnocc | 4,162,917 2.635109 1.047826 1 4 divocc | 4,162,917 5.190359 2.59173 1 9 stsubocc | 4,162,917 55.44135 26.20651 11 95 -------------+--------------------------------------------------------- stnatexp | 0 statenat | 0 cntynat | 0 stoccfip | 0 cntocfip | 0 -------------+--------------------------------------------------------- cntocpop | 4,162,917 2.891981 3.282129 0 9 regnres | 4,162,917 2.631036 1.051582 0 4 divres | 4,162,917 5.181098 2.597442 0 9 stsubres | 4,162,917 55.34304 26.27105 0 95 stresexp | 0 -------------+--------------------------------------------------------- stateres | 0 cntyres | 0 cityres | 0 citrspop | 0 metrores | 0 -------------+--------------------------------------------------------- stresfip | 0 cntyrfip | 0 cmsa | 0 smsarfip | 0 cntrspop | 0 -------------+--------------------------------------------------------- magerflg | 413,796 1 0 1 1 mageimp | 0 dmage | 4,162,917 26.40259 5.745526 10 49 mage36 | 4,162,917 13.40328 5.743951 1 36 mage12 | 4,162,917 8.715971 1.566805 1 13 -------------+--------------------------------------------------------- mage8 | 4,162,917 3.880182 1.185647 1 8 ormoth | 4,162,917 .4981115 1.603003 0 9 orracem | 4,162,917 5.727898 1.775317 1 9 mraceimp | 0 mrace | 4,162,917 1.389913 1.16628 1 9 -------------+--------------------------------------------------------- mrace3 | 4,162,917 1.372963 .7501243 1 3 dmeduc | 4,162,917 18.46405 22.23339 0 99 meduc6 | 4,162,917 3.444219 1.293686 1 6 dmarimp | 0 dmar | 4,162,917 1.280065 .4490306 1 2 -------------+--------------------------------------------------------- mplbir | 4,162,917 30.79004 17.77437 1 99 mplbirr | 4,162,917 1.159955 .3717617 1 3 dmagerpt | 4,162,917 91.79935 21.74209 10 99 adequacy | 4,162,917 1.513043 .8166945 1 4 nlbnl | 4,162,917 1.522207 7.100421 0 99 -------------+--------------------------------------------------------- nlbnd | 4,162,917 .6446821 7.819933 0 99 noterm | 4,162,917 .9947948 7.934816 0 99 dlivord | 4,162,917 2.661273 7.819982 1 99 livord9 | 4,162,917 2.081843 1.321693 1 9 dtotord | 4,162,917 3.105579 8.369131 1 99 -------------+--------------------------------------------------------- totord9 | 4,162,917 2.434812 1.566821 1 9 monpre | 4,162,917 4.798517 14.10338 0 99 mpre6 | 4,162,917 1.865166 1.173924 1 6 mpre5 | 4,162,917 1.402401 .8349347 1 5 nprevis | 4,162,917 13.44262 15.16609 0 99 -------------+--------------------------------------------------------- nprev12 | 4,162,917 6.786394 2.157874 1 12 lmpmon | 4,162,917 10.0642 17.80147 1 99 lmpday | 4,162,917 28.4684 31.52215 1 99 lmpyr | 4,162,917 2275.14 1486.029 1989 9999 llbmon | 4,162,917 38.62264 36.23745 1 99 -------------+--------------------------------------------------------- llbyr | 4,162,917 4521.328 2942.671 1900 9999 disllb | 4,162,917 377.9812 376.1011 0 999 isllb10 | 4,162,917 3.546521 3.413316 0 10 fagerflg | 338,977 1 0 1 1 dfage | 4,162,917 40.95757 26.33146 10 99 -------------+--------------------------------------------------------- fage11 | 4,162,917 5.579906 2.676081 1 11 orfath | 4,162,917 1.735257 3.340272 0 9 orracef | 4,162,917 6.14291 2.041809 1 9 frace | 4,162,917 15.90876 34.80621 1 99 frace4 | 4,162,917 1.687522 1.146112 1 4 -------------+--------------------------------------------------------- dfeduc | 4,162,917 31.61896 35.76967 0 99 feduc6 | 4,162,917 48.24986 14.73505 11 69 dfagerpt | 4,162,917 93.36793 18.99075 10 99 cdobmimp | 2 1 0 1 1 birmon | 4,162,917 6.548911 3.40364 1 12 -------------+--------------------------------------------------------- biryr | 4,162,917 1990 0 1990 1990 weekday | 4,162,917 4.036632 1.910253 1 7 gestestm | 161,651 1 0 1 1 gestimp | 487,194 1 0 1 1 dgestat | 4,162,917 39.79072 6.86856 17 99 -------------+--------------------------------------------------------- gestat10 | 4,162,917 6.68237 1.40065 1 10 gestat3 | 4,162,917 1.906296 .3277801 1 3 cseximp | 142 1 0 1 1 csex | 4,162,917 1.487871 .4998529 1 2 crace | 4,162,917 0 0 0 0 -------------+--------------------------------------------------------- crace3 | 4,162,917 1.398238 .7666875 1 3 dbirwt | 4,162,917 3351.248 648.369 227 9999 birwt12 | 4,162,917 7.191701 1.246966 1 12 birwt4 | 4,162,917 2.918981 .3200828 1 4 plurimp | 842 1 0 1 1 -------------+--------------------------------------------------------- dplural | 4,162,917 1.024078 .1586294 1 5 omaps | 4,162,917 29.94869 38.9106 0 99 omapsr | 4,162,917 3.723181 .9383112 1 5 fmaps | 4,162,917 30.64732 38.5022 0 99 fmapsr | 4,162,917 4.146208 .5936207 1 5 -------------+--------------------------------------------------------- clingest | 4,162,917 49.70313 22.94469 17 99 vaginal | 4,162,917 1.472529 1.420581 1 9 vbac | 4,162,917 2.200835 1.235975 1 9 primac | 4,162,917 2.0828 1.29582 1 9 repeac | 4,162,917 2.139559 1.268767 1 9 -------------+--------------------------------------------------------- forcep | 4,162,917 2.171653 1.252073 1 9 vacuum | 4,162,917 2.183291 1.24576 1 9 delmeth5 | 4,162,917 1.667835 1.169065 1 5 anemia | 4,162,917 2.280898 1.423706 1 9 cardiac | 4,162,917 2.295107 1.415819 1 9 -------------+--------------------------------------------------------- lung | 4,162,917 2.295435 1.415635 1 9 diabetes | 4,162,917 2.277998 1.425293 1 9 herpes | 4,162,917 2.917738 2.223685 1 9 hydra | 4,162,917 2.516905 1.777821 1 9 hemo | 4,162,917 2.521966 1.774916 1 9 -------------+--------------------------------------------------------- chyper | 4,162,917 2.292101 1.417503 1 9 phyper | 4,162,917 2.272286 1.428396 1 9 eclamp | 4,162,917 2.294545 1.416135 1 9 incervix | 4,162,917 2.519198 1.776507 1 9 pre4000 | 4,162,917 2.512724 1.780206 1 9 -------------+--------------------------------------------------------- preterm | 4,162,917 2.511332 1.780997 1 9 renal | 4,162,917 2.29623 1.415188 1 9 rh | 4,162,917 2.350676 1.523734 1 9 uterine | 4,162,917 2.693006 1.993405 1 9 othermr | 4,162,917 2.199574 1.465379 1 9 -------------+--------------------------------------------------------- tobacco | 4,162,917 3.818375 3.238034 1 9 cigar | 4,162,917 30.04351 44.06062 0 99 cigar6 | 4,162,917 2.006051 2.654952 0 6 alcohol | 4,162,917 3.810392 3.096838 1 9 drink | 4,162,917 26.6895 43.88732 0 99 -------------+--------------------------------------------------------- drink5 | 4,162,917 1.375439 2.215087 0 5 wtgain | 4,162,917 49.04417 32.13758 0 99 wtgain9 | 4,162,917 5.583362 2.703693 1 9 amnio | 4,162,917 2.220504 1.323768 1 9 monitor | 4,162,917 1.547264 1.506405 1 9 -------------+--------------------------------------------------------- induct | 4,162,917 2.16082 1.35455 1 9 stimula | 4,162,917 2.142888 1.363152 1 9 tocol | 4,162,917 2.237302 1.314486 1 9 ultras | 4,162,917 2.049881 1.97834 1 9 otherob | 4,162,917 2.208017 1.330489 1 9 -------------+--------------------------------------------------------- febrile | 4,162,917 2.271302 1.384805 1 9 meconium | 4,162,917 2.224852 1.409674 1 9 rupture | 4,162,917 2.250804 1.396025 1 9 abruptio | 4,162,917 2.276838 1.381707 1 9 preplace | 4,162,917 2.279373 1.380279 1 9 -------------+--------------------------------------------------------- excebld | 4,162,917 2.277711 1.381216 1 9 seizure | 4,162,917 2.282414 1.378557 1 9 precip | 4,162,917 2.265434 1.388057 1 9 prolong | 4,162,917 2.27257 1.384098 1 9 dysfunc | 4,162,917 2.254449 1.394058 1 9 -------------+--------------------------------------------------------- breech | 4,162,917 2.246129 1.398528 1 9 cephalo | 4,162,917 2.885723 2.231457 1 9 cord | 4,162,917 2.279902 1.37998 1 9 anesthe | 4,162,917 2.690316 1.97576 1 9 distress | 4,162,917 2.652673 1.997955 1 9 -------------+--------------------------------------------------------- otherlb | 4,162,917 2.176992 1.433273 1 9 nanemia | 4,162,917 2.325182 1.477787 1 9 injury | 4,162,917 2.900727 2.209673 1 9 alcosyn | 4,162,917 2.659595 1.960614 1 9 hyaline | 4,162,917 2.32115 1.480031 1 9 -------------+--------------------------------------------------------- meconsyn | 4,162,917 2.549782 1.825959 1 9 venl30 | 4,162,917 2.73296 2.062767 1 9 ven30m | 4,162,917 2.737922 2.059793 1 9 nseiz | 4,162,917 2.326015 1.477322 1 9 otherab | 4,162,917 2.290913 1.496408 1 9 -------------+--------------------------------------------------------- anen | 4,162,917 2.875755 2.316154 1 9 spina | 4,162,917 2.875683 2.316197 1 9 hydro | 4,162,917 2.875645 2.316219 1 9 microce | 4,162,917 2.875823 2.316113 1 9 nervous | 4,162,917 2.875681 2.316198 1 9 -------------+--------------------------------------------------------- heart | 4,162,917 2.874782 2.316732 1 9 circul | 4,162,917 2.874707 2.316776 1 9 rectal | 4,162,917 2.875815 2.316118 1 9 tracheo | 4,162,917 2.87577 2.316145 1 9 omphalo | 4,162,917 2.875698 2.316188 1 9 -------------+--------------------------------------------------------- gastro | 4,162,917 2.875587 2.316253 1 9 genital | 4,162,917 2.875201 2.316483 1 9 renalage | 4,162,917 2.87583 2.316109 1 9 urogen | 4,162,917 2.874749 2.316751 1 9 cleftlp | 4,162,917 2.875139 2.316519 1 9 -------------+--------------------------------------------------------- adactyly | 4,162,917 2.875119 2.316531 1 9 clubfoot | 4,162,917 2.875278 2.316437 1 9 hernia | 4,162,917 2.875759 2.316152 1 9 musculo | 4,162,917 2.874062 2.317159 1 9 downs | 4,162,917 2.875432 2.316345 1 9 -------------+--------------------------------------------------------- chromo | 4,162,917 2.875522 2.316292 1 9 othercon | 4,162,917 2.869901 2.319621 1 9 origm | 4,162,917 .9832034 .1285088 0 1 origf | 4,162,917 .9832034 .1285088 0 1 educm | 4,162,917 .9408266 .235949 0 1 -------------+--------------------------------------------------------- educf | 4,162,917 .9408266 .235949 0 1 geste | 4,162,917 .8402606 .3663643 0 1 omapsrf | 4,162,917 .7642506 .4244663 0 1 fmapsrf | 4,162,917 .7642506 .4244663 0 1 delmetrf | 4,162,917 .9874237 .1114366 0 1 -------------+--------------------------------------------------------- medrsk | 4,162,917 .9874237 .1114366 0 1 tobuse | 4,162,917 .7454259 .4356216 0 1 alcuse | 4,162,917 .7661359 .4232868 0 1 wtgn | 4,162,917 .8402606 .3663643 0 1 obstrc | 4,162,917 .9874237 .1114366 0 1 -------------+--------------------------------------------------------- clabor | 4,162,917 .9874237 .1114366 0 1 abnml | 4,162,917 .9874237 .1114366 0 1 congan | 4,162,917 .9093588 .2870983 0 1 educsmsa | 4,162,917 .7192293 .4493757 0 1 smsares | 0 -------------+--------------------------------------------------------- popsmas | 0 by Jean Roth , jroth@nber.org , 3 Jan 2016