The following list includes peer-reviewed research articles that have been written by staff of the Texas Department of State Health Services since its formation in September 2004. For more information about these articles or for a full-text copy, please contact the Medical and Research Library by e-mail at firstname.lastname@example.org by calling (512) 776-7559.
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2015 Articles (in date order with most recent first)
Vinikoor-Imler LC, Stewart TG, Luben TJ, Davis JA, Langlois PH.An exploratory analysis of the relationship between ambient ozone and particulate matter concentrations during early pregnancy and selected birth defects in Texas [published online ahead of print March 14, 2015]. Environ Pollut. 2015;202:1-6. doi: 10.1016/j.envpol.2015.03.001.
We performed an exploratory analysis of ozone (O3) and fine particulate matter (PM2.5) concentrations during early pregnancy and multiple types of birth defects. Data on births were obtained from the Texas Birth Defects Registry (TBDR) and the National Birth Defects Prevention Study (NBDPS) in Texas. Air pollution concentrations were previously determined by combining modeled air pollution concentrations with air monitoring data. The analysis generated hypotheses for future, confirmatory studies; although many of the observed associations were null. The hypotheses are provided by an observed association between O3 and craniosynostosis and inverse associations between PM2.5 and septal and obstructive heart defects in the TBDR. Associations with PM2.5 for septal heart defects and ventricular outflow tract obstructions were null using the NBDPS. Both the TBDR and the NBPDS had inverse associations between O3 and septal heart defects. Further research to confirm the observed associations is warranted.
Forrester MB, Bojes H. Adolescent pesticide exposures reported to Texas poison centers [published online ahead of print March 7, 2015]. Int J Adolesc Med Health. doi: 10.1515/ijamh-2014-0072
Abstract: BACKGROUND: Pesticides, particularly when misused, can cause serious morbidity and mortality. There is limited literature on pesticide exposures among adolescents. OBJECTIVE: The purpose of this study was to describe adolescent pesticide exposures reported to poison centers and compare them to adult exposures. SUBJECTS: Pesticide exposures reported to Texas poison centers during 2000-2013 where the patient was age 13 years or greater. METHODS: Cases were divided into adolescents (13-19 years) and adults (20 years or more). The distribution of the cases was determined for various factors, and comparisons were made between the two age groups. RESULTS: There were 2772 adolescent and 33,573 adult pesticide exposures. The most common types of pesticide among adolescent and adult cases, respectively, were insecticides (71% vs. 76%), herbicides (6% vs. 9%), repellents (11% vs. 8%), and rodenticides (10% vs. 5%). Adolescent patients were 56% male and 43% female; adult patients were 45% male and 55% female. The most common exposure routes among adolescent and adult cases, respectively, were dermal (29% vs. 38%), inhalation (22% vs. 33%), ingestion (47% vs. 29%), and ocular (14% vs. 13%). The exposure reason for adolescent and adult exposures, respectively, were unintentional (82% vs. 89%), intentional (13% vs. 7%), adverse reaction (2% vs. 3%), and other/unknown (3% vs. 1%). CONCLUSION: Compared to adult exposures, adolescent pesticide exposures were more likely to involve repellents and rodenticides, involve males, occur by ingestion, and be intentional.
Wang Y, Liu G, Canfield MA, et al. Racial/Ethnic differences in survival of United States children with birth defects: a population-based study. J Pediatr. pii: S0022-3476(14)01194-9. doi: 10.1016/j.jpeds.2014.12.025.
OBJECTIVES: To examine racial/ethnic-specific survival of children with major birth defects in the US. STUDY DESIGN: We pooled data on live births delivered during 1999-2007 with any of 21 birth defects from 12 population-based birth defects surveillance programs. We used the Kaplan-Meier method to calculate cumulative survival probabilities and Cox proportional hazards models to estimate mortality risk. RESULTS: For most birth defects, there were small-to-moderate differences in neonatal (<28 days) survival among racial/ethnic groups. However, compared with children born to non-Hispanic white mothers, postneonatal infant (28 days to <1 year) mortality risk was significantly greater among children born to non-Hispanic black mothers for 13 of 21 defects (hazard ratios [HRs] 1.3-2.8) and among children born to Hispanic mothers for 10 of 21 defects (HRs 1.3-1.7). Compared with children born to non-Hispanic white mothers, a significantly increased childhood (≤8 years) mortality risk was found among children born to Asian/Pacific Islander mothers for encephalocele (HR 2.6), tetralogy of Fallot, and atrioventricular septal defect (HRs 1.6-1.8) and among children born to American Indian/Alaska Native mothers for encephalocele (HR 2.8), whereas a significantly decreased childhood mortality risk was found among children born to Asian/Pacific Islander mothers for cleft lip with or without cleft palate (HR 0.6). CONCLUSION: Children with birth defects born to non-Hispanic black and Hispanic mothers carry a greater risk of mortality well into childhood, especially children with congenital heart defect. Understanding survival differences among racial/ethnic groups provides important information for policy development and service planning.
Forrester MB, Hinson D. Ebola goes viral: Google Trends pattern of Ebola searches during recent Ebola outbreak in Texas. TX Public Health J. 2015;67(1):4-6.
Ordonez JE, Kleinschmidt KC, Forrester MB. Electronic cigarette exposures reported to Texas poison centers. Nicotine Tob Res. 2015;17(2):209-11. doi: 10.1093/ntr/ntu223.
INTRODUCTION: Exposure to the liquid nicotine solutions in electronic cigarettes (e-cigs) may be dangerous because they are highly concentrated. Little is known about the impact of exposure on public health. This study describes e-cig exposures reported to poison centers. METHODS: All e-cig exposures reported to Texas poison centers during 2009 to February 2014 were identified. Exposures involving other substances in addition to e-cigs and exposures not followed to a final medical outcome were included. The distributions of exposures by demographic and clinical factors were determined. RESULTS: Of 225 total exposures, 2 were reported in January 2009, 6 in 2010, 11 in 2011, 43 in 2012, 123 in 2013, and 40 through February 2014. Fifty-three percent (n = 119) occurred among individuals aged <5 years old, 41% (n = 93) occurred among individuals aged >20 years old, and 6% (n = 13) occurred among individuals aged 6-19 years. Fifty percent were female. The route of exposure was 78% ingestion. Eighty-seven percent of the exposures were unintentional, and 5% were intentional. The exposures occurred at patients' own residences in 95% of the cases. The clinical effects reported most often were vomiting (20%), nausea (10%), headache (4%), ocular irritation (5%), dizziness (5%), and lethargy (2%). CONCLUSION: E-cig exposures reported to poison centers are increasing. Most of the patients are young children, and the exposures most frequently occur through ingestion. Reported exposures often do not have serious outcomes.
Yazdy MM, Werler MM, Anderka M, Langlois PH, Vieira VM. Spatial analysis of gastroschisis in Massachusetts and Texas. Ann Epidemiol. 2015;25(1):7-14. doi: 10.1016/j.annepidem.2014.10.001.
PURPOSE: Previous research has suggested gastroschisis, a congenital malformation, may be linked to environmental or infectious factors and cases can occur in clusters. The objective of this study was to identify geographic areas of elevated gastroschisis risk. METHODS: Cases of gastroschisis were identified from birth defect registries in Massachusetts and Texas. Random samples of live births were selected as controls. Generalized additive models were used to create a continuous map surface of odds ratios (ORs) by smoothing over latitude and longitude. Maternal age, race/ethnicity, education, cigarette smoking, and insurance status (MA only) were assessed for confounding. We used permutation tests to identify statistically significant areas of increased risk. RESULTS: An area of increased risk was identified in North Central Massachusetts but was not significant after adjustment (P value = .07; OR = 2.0). In Texas, two statistically significant areas of increased risk were identified after adjustment (P value = .02; OR = 1.3 and 1.2). Texas had sufficient data to assess the combination of space and time, which identified an increased risk in 2003 and 2004. CONCLUSIONS: This study suggests there were areas of elevated gastroschisis risk in Massachusetts and Texas, which cannot be explained by the risk factors we assessed. Additional exploration of underlying artifactual, environmental, infectious, or behavioral factors may further our understanding of gastroschisis.