National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System最新文献

{"title":"Trends and Characteristics of Sexually Transmitted Infections During Pregnancy: United States, 2016-2018.","authors":"Elizabeth C W Gregory,&nbsp;Danielle M Ely","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Objectives-This report presents data on recent trends for three sexually transmitted infections (STIs)-chlamydia, gonorrhea, and syphilis-reported among women giving birth in the United States from 2016 through 2018, and rates by selected characteristics for 2018. Methods-Data are from birth certificates and are based on 100% of births registered in the United States for 2016, 2017, and 2018. Birth certificate data on infections during pregnancy are recommended to be collected from the mother's medical records (1). Mothers are to be reported as having an infection if there is a confirmed diagnosis or documented treatment for the infection in their medical record (2). Results-Among women giving birth in 2018, the overall rates of chlamydia, gonorrhea, and syphilis were 1,843.9, 310.2, and 116.7 per 100,000 births, respectively. The rates for these STIs increased 2% (chlamydia), 16% (gonorrhea), and 34% (syphilis) from 2016 through 2018. In 2018, rates of chlamydia and gonorrhea decreased with advancing maternal age, whereas those for syphilis decreased with maternal age through 30-34 years and then increased for women aged 35 and over. In 2018, rates of all three STIs were highest for non-Hispanic black women, women who smoked during pregnancy, women who received late or no prenatal care, and women for whom Medicaid was the principal source of payment for the delivery. Among women aged 25 and over, rates of each of the STIs decreased with increasing maternal education.</p>","PeriodicalId":35088,"journal":{"name":"National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System","volume":"69 3","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38020273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the Pregnancy Status Checkbox on the Identification of Maternal Deaths.","authors":"Donna L Hoyert,&nbsp;Sayeedha F G Uddin,&nbsp;Arialdi M Miniño","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Objectives-This report quantifies the impact of the inclusion of a pregnancy status checkbox item on the U.S. Standard Certificate of Death on the number of deaths classified as maternal. Maternal mortality rates calculated with and without using the checkbox information for deaths in 2015 and 2016 are presented. Methods-This report is based on cause-of-death information from 2015 and 2016 death certificates collected through the National Vital Statistics System. Records originally assigned to a specified range of ICD-10 codes (i.e., A34, O00-O99) when using information from the checkbox item were recoded without using the checkbox item. Ratios of deaths assigned as maternal deaths using checkbox item information to deaths assigned without checkbox item information were calculated to quantify the impact of the pregnancy status checkbox item on the classification of maternal deaths for 47 states and the District of Columbia. Maternal mortality rates for all jurisdictions calculated using cause-of-death information entered on the certificate with and without the checkbox were compared overall and by characteristics of the decedent. Results-Use of information from the checkbox, along with information from the cause-of-death section of the certificate, identified 1,527 deaths as maternal compared with 498 without the checkbox in 2015 and 2016 (ratio = 3.07), with the impact varying by characteristics of the decedent such as age at death. The ratio for women under age 25 was 2.15 (204 compared with 95 deaths) but was 14.14 (523 compared with 37 deaths) for women aged 40-54. Without the adoption of the checkbox item, maternal mortality rates in both 2015 and 2016 would have been reported as 8.7 deaths per 100,000 live births compared with 8.9 in 2002. With the checkbox, the maternal mortality rate would be reported as 20.9 and 21.8 deaths per 100,000 live births in 2015 and 2016.</p>","PeriodicalId":35088,"journal":{"name":"National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System","volume":"69 1","pages":"1-25"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38020270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Maternal Mortality in the United States: Changes in Coding, Publication, and Data Release, 2018.","authors":"Donna L Hoyert,&nbsp;Arialdi M Miniño","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>This report describes changes in how the National Center for Health Statistics (NCHS) will code, publish, and release maternal mortality data and presents official 2018 maternal mortality estimates using a new coding method. Due to the incremental implementation of the pregnancy status checkbox item on the 2003 revised U.S. Standard Certificate of Death, NCHS last published an official estimate of the U.S. maternal mortality rate in 2007. As of 2018, implementation of the revised certificate, including its pregnancy checkbox, is complete for all 50 states (noting that California implemented a different checkbox than that on the U.S. Standard Certificate of Death), allowing NCHS to resume the routine publication of maternal mortality statistics. However, an evaluation of data quality indicated some errors with the reporting of maternal deaths (deaths within 42 days of pregnancy) following adoption of the checkbox, including overreporting of maternal deaths among older women. Therefore, NCHS has adopted a new method (to be called the 2018 method) for coding maternal deaths to mitigate these probable errors. The 2018 method involves further restricting application of the pregnancy checkbox to decedents aged 10-44 years from the previous age group of 10-54. In addition, the 2018 method restricts assignment of maternal codes to the underlying cause alone when the checkbox is the only indication of pregnancy on the death certificate, and such coding would be applied only to decedents aged 10-44 based solely on the checkbox when no other pregnancy information is provided in the cause-of-death statement. Based on the new method, a total of 658 deaths were identified in 2018 as maternal deaths. The maternal mortality rate for 2018 was 17.4 deaths per 100,000 live births, and the rate for non-Hispanic black women (37.1) was 2.5 to 3.1 times the rates for non-Hispanic white (14.7) and Hispanic (11.8) women. Rates also increased with age. Maternal mortality rates calculated without using information obtained from the checkbox are also presented for 2002, 2015, 2016, 2017, and 2018 to provide comparisons over time using a comparable coding approach across all states.</p>","PeriodicalId":35088,"journal":{"name":"National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System","volume":"69 2","pages":"1-18"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38024254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Births: Final Data for 2018.","authors":"Joyce A Martin,&nbsp;Brady E Hamilton,&nbsp;Michelle J K Osterman,&nbsp;Anne K Driscoll","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Objectives-This report presents 2018 data on U.S. births according to a wide variety of characteristics. Trends in fertility patterns and maternal and infant characteristics are described and interpreted. Methods-Descriptive tabulations of data reported on the birth certificates of the 3.79 million births that occurred in 2018 are presented. Data are presented for maternal age, live-birth order, race and Hispanic origin, marital status, tobacco use, prenatal care, source of payment for the delivery, method of delivery, gestational age, birthweight, and plurality. Selected data by mother's state of residence and birth rates by age also are shown. Trend data for 2010 through 2018 are presented for selected items. Trend data by race and Hispanic origin are shown for 2016-2018. Results-3,791,712 births were registered in the United States in 2018, down 2% from 2017. Compared with rates in 2017, the general fertility rate declined to 59.1 births per 1,000 women aged 15-44. The birth rate for females aged 15-19 fell 7% in 2018. Birth rates declined for women aged 20-34 and increased for women aged 35-44. The total fertility rate declined to 1,729.5 births per 1,000 women in 2018. Birth rates for both married and unmarried women declined from 2017 to 2018. The percentage of women who began prenatal care in the first trimester of pregnancy rose to 77.5% in 2018; the percentage of all women who smoked during pregnancy declined to 6.5%. The cesarean delivery rate decreased to 31.9% in 2018 following an increase in 2017. Medicaid was the source of payment for 42.3% of all 2018 births, down 2% from 2017. The preterm birth rate rose for the fourth straight year to 10.02% in 2018; the rate of low birthweight was unchanged at 8.28%. Twin and triplet and higher-order multiple birth rates declined in 2018 (Figure 1).</p>","PeriodicalId":35088,"journal":{"name":"National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System","volume":"68 13","pages":"1-47"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38015030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Regional Differences in the Drugs Most Frequently Involved in Drug Overdose Deaths: United States, 2017.","authors":"Holly Hedegaard,&nbsp;Brigham A Bastian,&nbsp;James P Trinidad,&nbsp;Merianna R Spencer,&nbsp;Margaret Warner","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Objective-This report describes regional differences in the specific drugs most frequently involved in drug overdose deaths in the United States in 2017. Methods-Data from the 2017 National Vital Statistics System-Mortality files were linked to electronic files containing literal text information from death certificates. Drug overdose deaths were identified using International Classification of Diseases, 10th Revision underlying cause-of-death codes X40-X44, X60-X64, X85, and Y10-Y14. Drug mentions were identified using established methods for searching the literal text from death certificates. Deaths were assigned to 1 of 10 U.S. Department of Health and Human Services (HHS) regions based on the decedent's state of residence. The number and age-adjusted death rate was determined for the 10 drugs most frequently involved in drug overdose deaths in 2017, both nationally and for each HHS region. Deaths involving more than one drug were counted in all relevant drug categories (i.e., the same death could be counted in more than one drug category). Results-Among drug overdose deaths in 2017 that mentioned at least 1 specific drug on the death certificate, the 10 drugs most frequently involved included fentanyl, heroin, cocaine, methamphetamine, alprazolam, oxycodone, morphine, methadone, hydrocodone, and diphenhydramine. Regionally, 6 drugs (alprazolam, cocaine, fentanyl, heroin, methadone, and oxycodone) were found among the 10 most frequently involved drugs in all 10 HHS regions, although the relative ranking varied by region. Age-adjusted rates of drug overdose deaths involving fentanyl or deaths involving cocaine were higher in the regions east of the Mississippi River, while age-adjusted rates for drug overdose deaths involving methamphetamine were higher in the West. The regional patterns observed did not change after adjustment for differences in the specificity of drug reporting. Conclusions-The drugs most frequently involved in drug overdose deaths in 2017 varied by HHS region. Understanding the regional differences can help inform local prevention and policy efforts.</p>","PeriodicalId":35088,"journal":{"name":"National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System","volume":"68 12","pages":"1-16"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38012442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Maternal Characteristics and Infant Outcomes in Appalachia and the Delta.","authors":"Anne K Driscoll,&nbsp;Danielle M Ely","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Objectives-This report compares maternal characteristics and outcomes for infants born to mothers in Appalachia, the Delta, and the rest of the United States. Methods-The 2017 vital statistics natality file and the 2016-2017 linked birth/infant death data files were used to compare maternal characteristics (e.g., race and Hispanic origin, age, and marital status) of women who gave birth in Appalachia, the Delta, and the rest of the United States. Comparisons of infant outcomes (preterm, low birthweight, and infant mortality) across the three regions were made overall and within categories of these maternal characteristics. Results-Characteristics of women who gave birth differed across the three regions. Women in the Delta were most likely to be teenagers, unmarried, and not have a college degree, followed by women in Appalachia, and then by women in the rest of the United States. Overall and within most categories of maternal characteristics, infants born in the Delta were more likely to be preterm (12.37%) or low birthweight (10.75%) and were more likely to die in their first year of life (8.17 infant deaths per 1,000 live births) than those born in Appalachia (10.75%, 8.87%, and 6.82, respectively), while those born in the rest of the United States were the least likely (9.78%, 8.14%, and 5.67, respectively). Conclusions-Maternal characteristics associated with poor infant outcomes are most common among women who give birth in the Delta, followed by women in Appalachia, and then the rest of the United States. Within most categories of these maternal characteristics, infants born in the Delta have the worst outcomes, followed by those born in Appalachia, and then those born in the rest of the United States.</p>","PeriodicalId":35088,"journal":{"name":"National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System","volume":"68 11","pages":"1-15"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38012441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Infant Mortality in the United States, 2017: Data From the Period Linked Birth/Infant Death File.","authors":"Danielle M Ely,&nbsp;Anne K Driscoll","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Objectives-This report presents 2017 infant mortality statistics by age at death, maternal race and Hispanic origin, maternal age, maternal state of residence, gestational age, and leading causes of death. Trends in infant mortality are also examined. Methods-Descriptive tabulations of data are presented and interpreted for infant deaths and infant mortality rates using the 2017 period linked birth/infant death file; the linked birth/infant death file is based on birth and death certificates registered in all states and the District of Columbia. Results-A total of 22,341 infant deaths were reported in the United States in 2017. The U.S. infant mortality rate was 5.79 infant deaths per 1,000 live births, not statistically different from the rate of 5.87 in 2016. The neonatal and postneonatal mortality rates for 2017 (3.85 and 1.94, respectively) were also essentially unchanged from 2016. The 2017 infant mortality rate for infants of non-Hispanic black women (10.97) was more than twice as high as that for infants of non-Hispanic white (4.67), non-Hispanic Asian (3.78), and Hispanic (5.10) women. Infant mortality rates by state for 2017 ranged from a low of 3.66 in Massachusetts to a high of 8.73 in Mississippi. Infants born very preterm (less than 28 weeks of gestation) had the highest mortality rate (384.39), 183 times as high as that for infants born at term (37-41 weeks of gestation) (2.10). The five leading causes of infant death in 2017 were the same as in 2016; cause of death rankings and mortality rates varied by maternal race and Hispanic origin. Preterm-related causes of death accounted for 34% of the 2017 infant deaths, unchanged from 2016.</p>","PeriodicalId":35088,"journal":{"name":"National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System","volume":"68 10","pages":"1-20"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38012440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing the Quality of Medical and Health Data From the 2003 Birth Certificate Revision: Results From New York City.","authors":"Elizabeth C W Gregory,&nbsp;Joyce A Martin,&nbsp;Erica Lee Argov,&nbsp;Michelle J K Osterman","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Objectives-A primary goal of the 2003 revision of the U.S. Standard Certificate of Live Birth was to improve data quality.This report evaluates the quality of selected 2003 revision-based medical and health data by comparing birth certificate data for New York City with information abstracted from hospital medical records.Methods-A random sample of records for 900 births occurring in New York City in 2013 was reviewed. Birth certificate and hospital medical records data were compared for these categories: pregnancy history, prenatal care, gestational age, birthweight, pregnancy risk factors, source of payment, characteristics of labor and delivery, fetal presentation, method of delivery, abnormal conditions of the newborn, infant living, and infant breastfed. Levels of missing data, exact agreement, kappa scores, sensitivity, and false discovery rates are presented where applicable. Results-Exact agreement or sensitivity between birth certificate and medical record data was high (90.0% or greater) for a number of items (e.g., number of previous cesarean deliveries, cephalic presentation, cesarean delivery, vaginal/spontaneous delivery, obstetric estimate of gestation [within 2 weeks], Medicaid as source of payment for the delivery, birthweight [within 500 grams]), but extremely low (less than 40.0%) for several items (e.g., gestational hypertension, previous preterm birth, augmentation of labor, assisted ventilation, maternal transfusion). Levels of agreement or sensitivity for several items (e.g., obstetric estimate of gestation at delivery [exact number of weeks], previous cesarean delivery, private insurance as the source of payment for delivery, and total number of prenatal care visits [within two visits]), were substantial (between 75.0% and 89.9%) or moderate (between 60.0% and 74.9%). Data quality often varied by hospital.</p>","PeriodicalId":35088,"journal":{"name":"National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System","volume":"68 8","pages":"1-20"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38015029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deaths: Leading Causes for 2017.","authors":"Melonie Heron","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Objectives-This report presents final 2017 data on the 10 leading causes of death in the United States by age, sex, race, and Hispanic origin. Leading causes of infant, neonatal, and postneonatal death are also presented. This report supplements \"Deaths: Final Data for 2017,\" the National Center for Health Statistics' annual report of final mortality statistics. Methods-Data in this report are based on information from all death certificates filed in the 50 states and the District of Columbia in 2017. Causes of death classified by the International Classification of Diseases, 10th Revision (ICD-10) are ranked according to the number of deaths assigned to rankable causes. Cause-of-death statistics are based on the underlying cause of death. Results-In 2017, the 10 leading causes of death were, in rank order: Diseases of heart; Malignant neoplasms; Accidents (unintentional injuries); Chronic lower respiratory diseases; Cerebrovascular diseases; Alzheimer disease; Diabetes mellitus; Influenza and pneumonia; Nephritis, nephrotic syndrome and nephrosis; and Intentional self-harm (suicide). They accounted for 74% of all deaths occurring in the United States. Differences in the rankings are evident by age, sex, race, and Hispanic origin. Leading causes of infant death for 2017 were, in rank order: Congenital malformations, deformations and chromosomal abnormalities; Disorders related to short gestation and low birth weight, not elsewhere classified; Newborn affected by maternal complications of pregnancy; Sudden infant death syndrome; Accidents (unintentional injuries); Newborn affected by complications of placenta, cord and membranes; Bacterial sepsis of newborn; Diseases of the circulatory system; Respiratory distress of newborn; and Neonatal hemorrhage. Important variations in the leading causes of infant death are noted for the neonatal and postneonatal periods.</p>","PeriodicalId":35088,"journal":{"name":"National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System","volume":"68 6","pages":"1-77"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38015031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"United States Life Tables, 2017.","authors":"Elizabeth Arias","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Objectives-This report presents complete period life tables for the United States by race, Hispanic origin, and sex, based on age-specific death rates in 2017. Methods-Data used to prepare the 2017 life tables are 2017 final mortality statistics; July 1, 2017 population estimates based on the 2010 decennial census; and 2017 Medicare data for persons aged 66-99. The methodology used to estimate the life tables for the Hispanic population remains unchanged from that developed for the publication of life tables by Hispanic origin for data year 2006. The methodology used to estimate the 2017 life tables for all other groups was first implemented with data year 2008. Results-In 2017, the overall expectation of life at birth was 78.6 years, decreasing from 78.7 in 2016. Between 2016 and 2017, life expectancy at birth decreased by 0.1 year for males (76.2 to 76.1) and did not change for females (81.1). Life expectancy at birth decreased by 0.1 year for the white population (78.9 to 78.8) and the non-Hispanic white population (78.6 to 78.5) between 2016 and 2017. Life expectancy at birth did not change from 2016 for the black population (75.3), the non-Hispanic black population (74.9), and the Hispanic population (81.8).</p>","PeriodicalId":35088,"journal":{"name":"National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System","volume":"68 7","pages":"1-66"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38015028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}