Summary statistics for natl1991 dataset : by Jean Roth , jroth@nber.org , 22 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- datayear | 4115342 1991 0 1991 1991 rectype | 4115342 1.233502 .4230587 1 2 restatus | 4115342 1.258946 .4949117 1 4 recwt | 4115342 1 0 1 1 pldel | 4115342 1.029585 .3037371 1 9 -------------+-------------------------------------------------------- pldel3 | 4115342 1.01198 .1108371 1 3 birattnd | 4115342 1.166716 .6379825 1 9 regnocc | 4115342 2.641283 1.046931 1 4 divocc | 4115342 5.208395 2.591009 1 9 stsubocc | 4115342 55.61369 26.19898 11 95 -------------+-------------------------------------------------------- stnatexp | 0 statenat | 0 cntynat | 0 stoccfip | 0 cntocfip | 0 -------------+-------------------------------------------------------- cntocpop | 4115342 2.888906 3.279144 0 9 regnres | 4115342 2.637472 1.05056 0 4 divres | 4115342 5.199687 2.59663 0 9 stsubres | 4115342 55.52118 26.26215 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 | 362014 1 0 1 1 mageimp | 0 dmage | 4115342 26.44034 5.837226 10 49 mage36 | 4115342 13.44105 5.835623 1 36 mage12 | 4115342 8.719553 1.591774 1 13 -------------+-------------------------------------------------------- mage8 | 4115342 3.889458 1.201068 1 8 ormoth | 4115342 .4006236 1.304302 0 9 orracem | 4115342 5.660384 1.790731 1 9 mraceimp | 0 mrace | 4115342 1.400447 1.189716 1 9 -------------+-------------------------------------------------------- mrace3 | 4115342 1.377278 .7528171 1 3 dmeduc | 4115342 15.24259 15.55805 0 99 meduc6 | 4115342 3.350436 1.22166 1 6 dmarimp | 0 dmar | 4115342 1.295075 .4560766 1 2 -------------+-------------------------------------------------------- mplbir | 4115342 31.0384 17.92226 1 99 mplbirr | 4115342 1.167705 .3796332 1 3 dmagerpt | 4115342 92.64882 20.51578 10 99 adequacy | 4115342 1.504138 .8111631 1 4 nlbnl | 4115342 1.42448 6.330351 0 99 -------------+-------------------------------------------------------- nlbnd | 4115342 .5110766 6.938485 0 99 noterm | 4115342 .8676892 7.055825 0 99 dlivord | 4115342 2.539039 6.973849 1 99 livord9 | 4115342 2.080942 1.306694 1 9 dtotord | 4115342 2.991063 7.585624 1 99 -------------+-------------------------------------------------------- totord9 | 4115342 2.442156 1.562403 1 9 monpre | 4115342 4.756085 14.03607 0 99 mpre6 | 4115342 1.852148 1.165752 1 6 mpre5 | 4115342 1.39376 .8271511 1 5 nprevis | 4115342 13.52235 15.22794 0 99 -------------+-------------------------------------------------------- nprev12 | 4115342 6.813608 2.142879 1 12 lmpmon | 4115342 10.34919 18.48829 1 99 lmpday | 4115342 27.9428 31.05239 1 99 lmpyr | 4115342 2313.262 1575.654 1990 9999 llbmon | 4115342 38.38669 36.16982 1 99 -------------+-------------------------------------------------------- llbyr | 4115342 4512.122 2939.171 1900 9999 disllb | 4115342 375.4467 375.5063 0 999 isllb10 | 4115342 3.529285 3.39627 0 10 fagerflg | 292953 1 0 1 1 dfage | 4115342 41.38676 26.65063 10 99 -------------+-------------------------------------------------------- fage11 | 4115342 5.625401 2.704543 1 11 orfath | 4115342 1.715596 3.315427 0 9 orracef | 4115342 6.107619 2.076679 1 9 frace | 4115342 16.64502 35.5052 1 99 frace4 | 4115342 1.709556 1.161193 1 4 -------------+-------------------------------------------------------- dfeduc | 4115342 29.42508 34.1656 0 99 feduc6 | 4115342 47.70345 14.80784 11 69 dfagerpt | 4115342 94.09916 17.77309 12 99 cdobmimp | 9 1 0 1 1 birmon | 4115342 6.549176 3.412406 1 12 -------------+-------------------------------------------------------- biryr | 4115342 1991 0 1991 1991 weekday | 4115342 4.035338 1.905283 1 7 gestestm | 175246 1 0 1 1 gestimp | 443940 1 0 1 1 dgestat | 4115342 39.69651 6.672616 17 99 -------------+-------------------------------------------------------- gestat10 | 4115342 6.650235 1.388378 1 10 gestat3 | 4115342 1.903467 .3289495 1 3 cseximp | 99 1 0 1 1 csex | 4115342 1.488805 .4998747 1 2 crace | 4115342 0 0 0 0 -------------+-------------------------------------------------------- crace3 | 4115342 1.403971 .7702376 1 3 dbirwt | 4115342 3342.937 644.4744 227 9999 birwt12 | 4115342 7.175999 1.246425 1 12 birwt4 | 4115342 2.917195 .3225623 1 4 plurimp | 595 1 0 1 1 -------------+-------------------------------------------------------- dplural | 4115342 1.024741 .1612761 1 5 omaps | 4115342 29.18619 38.43477 0 99 omapsr | 4115342 3.710148 .9330188 1 5 fmaps | 4115342 29.88407 38.03349 0 99 fmapsr | 4115342 4.138383 .5872386 1 5 -------------+-------------------------------------------------------- clingest | 4115342 48.99543 22.38456 17 99 vaginal | 4115342 1.424997 1.295636 1 9 vbac | 4115342 2.157242 1.119076 1 9 primac | 4115342 2.04086 1.179732 1 9 repeac | 4115342 2.097617 1.152021 1 9 -------------+-------------------------------------------------------- forcep | 4115342 2.134765 1.131977 1 9 vacuum | 4115342 2.136355 1.131084 1 9 delmeth5 | 4115342 1.646361 1.141405 1 5 anemia | 4115342 2.270215 1.400838 1 9 cardiac | 4115342 2.284691 1.392781 1 9 -------------+-------------------------------------------------------- lung | 4115342 2.284682 1.392787 1 9 diabetes | 4115342 2.265748 1.403286 1 9 herpes | 4115342 2.85609 2.149427 1 9 hydra | 4115342 2.501654 1.754418 1 9 hemo | 4115342 2.507387 1.751132 1 9 -------------+-------------------------------------------------------- chyper | 4115342 2.281949 1.394323 1 9 phyper | 4115342 2.26202 1.405313 1 9 eclamp | 4115342 2.284779 1.392732 1 9 incervix | 4115342 2.505658 1.752126 1 9 pre4000 | 4115342 2.498518 1.756205 1 9 -------------+-------------------------------------------------------- preterm | 4115342 2.497104 1.757008 1 9 renal | 4115342 2.286082 1.391997 1 9 rh | 4115342 2.339577 1.500797 1 9 uterine | 4115342 2.636221 1.908531 1 9 othermr | 4115342 2.184016 1.444888 1 9 -------------+-------------------------------------------------------- tobacco | 4115342 3.759602 3.202731 1 9 cigar | 4115342 29.00135 43.63611 0 99 cigar6 | 4115342 1.93825 2.632624 0 6 alcohol | 4115342 3.74437 3.056146 1 9 drink | 4115342 25.66502 43.34474 0 99 -------------+-------------------------------------------------------- drink5 | 4115342 1.320046 2.188608 0 5 wtgain | 4115342 48.41696 31.88525 0 99 wtgain9 | 4115342 5.544286 2.701965 1 9 amnio | 4115342 2.159939 1.157074 1 9 monitor | 4115342 1.456203 1.331323 1 9 -------------+-------------------------------------------------------- induct | 4115342 2.088831 1.194829 1 9 stimula | 4115342 2.073107 1.202451 1 9 tocol | 4115342 2.174956 1.148379 1 9 ultras | 4115342 1.950592 1.876845 1 9 otherob | 4115342 2.144596 1.165691 1 9 -------------+-------------------------------------------------------- febrile | 4115342 2.240142 1.312834 1 9 meconium | 4115342 2.194087 1.337754 1 9 rupture | 4115342 2.221278 1.323292 1 9 abruptio | 4115342 2.246879 1.309013 1 9 preplace | 4115342 2.249295 1.307632 1 9 -------------+-------------------------------------------------------- excebld | 4115342 2.247478 1.308671 1 9 seizure | 4115342 2.252302 1.305904 1 9 precip | 4115342 2.234667 1.315906 1 9 prolong | 4115342 2.242697 1.31139 1 9 dysfunc | 4115342 2.224244 1.321671 1 9 -------------+-------------------------------------------------------- breech | 4115342 2.215961 1.326176 1 9 cephalo | 4115342 2.825627 2.155355 1 9 cord | 4115342 2.350848 1.501396 1 9 anesthe | 4115342 2.631901 1.887793 1 9 distress | 4115342 2.593726 1.910163 1 9 -------------+-------------------------------------------------------- otherlb | 4115342 2.140757 1.364102 1 9 nanemia | 4115342 2.331487 1.489965 1 9 injury | 4115342 2.860057 2.160511 1 9 alcosyn | 4115342 2.662942 1.966072 1 9 hyaline | 4115342 2.326856 1.492539 1 9 -------------+-------------------------------------------------------- meconsyn | 4115342 2.553349 1.832255 1 9 venl30 | 4115342 2.736353 2.070037 1 9 ven30m | 4115342 2.742183 2.066544 1 9 nseiz | 4115342 2.331915 1.489725 1 9 otherab | 4115342 2.293824 1.510367 1 9 -------------+-------------------------------------------------------- anen | 4115342 2.846708 2.282839 1 9 spina | 4115342 2.846652 2.282872 1 9 hydro | 4115342 2.846634 2.282882 1 9 microce | 4115342 2.846796 2.282787 1 9 nervous | 4115342 2.846663 2.282865 1 9 -------------+-------------------------------------------------------- heart | 4115342 2.845768 2.283393 1 9 circul | 4115342 2.845712 2.283426 1 9 rectal | 4115342 2.846784 2.282794 1 9 tracheo | 4115342 2.846735 2.282823 1 9 omphalo | 4115342 2.846659 2.282867 1 9 -------------+-------------------------------------------------------- gastro | 4115342 2.846609 2.282897 1 9 genital | 4115342 2.846187 2.283146 1 9 renalage | 4115342 2.84679 2.28279 1 9 urogen | 4115342 2.845838 2.283352 1 9 cleftlp | 4115342 2.846107 2.283193 1 9 -------------+-------------------------------------------------------- adactyly | 4115342 2.846111 2.283191 1 9 clubfoot | 4115342 2.846364 2.283042 1 9 hernia | 4115342 2.846767 2.282804 1 9 musculo | 4115342 2.845149 2.283758 1 9 downs | 4115342 2.846437 2.282999 1 9 -------------+-------------------------------------------------------- chromo | 4115342 2.84645 2.282991 1 9 othercon | 4115342 2.840676 2.286386 1 9 origm | 4115342 .9949516 .0708727 0 1 origf | 4115342 .9949516 .0708727 0 1 educm | 4115342 .9409551 .2357088 0 1 -------------+-------------------------------------------------------- educf | 4115342 .9409551 .2357088 0 1 geste | 4115342 .8506778 .3564058 0 1 omapsrf | 4115342 .7734677 .4185875 0 1 fmapsrf | 4115342 .7734677 .4185875 0 1 delmetrf | 4115342 .9989223 .0328103 0 1 -------------+-------------------------------------------------------- medrsk | 4115342 .9989223 .0328103 0 1 tobuse | 4115342 .7560839 .4294427 0 1 alcuse | 4115342 .7769102 .4163182 0 1 wtgn | 4115342 .8506778 .3564058 0 1 obstrc | 4115342 .9989223 .0328103 0 1 -------------+-------------------------------------------------------- clabor | 4115342 .9989223 .0328103 0 1 abnml | 4115342 .9989223 .0328103 0 1 congan | 4115342 .9210593 .2696462 0 1 educsmsa | 4115342 .7193988 .449293 0 1 smsares | 0 -------------+-------------------------------------------------------- popsmas | 0 by Jean Roth , jroth@nber.org , 22 Dec 2015