Pamela K. Xaverius

Association between long-term air pollution and increased blood pressure and hypertension in China.

Several studies have investigated the short-term effects of ambient air pollutants in the development of high blood pressure and hypertension. However, little information exists regarding the health effects of long-term exposure. To investigate the association between residential long-term exposure to air pollution and blood pressure and hypertension, we studied 24 845 Chinese adults in 11 districts of 3 northeastern cities from 2009 to 2010. Three-year average concentration of particles with an aerodynamic diameter ⩽10 µm (PM10), sulfur dioxide (SO2), nitrogen dioxides (NO2), and ozone (O3) were calculated from monitoring stations in the 11 districts. We used generalized additive models and 2-level logistic regressions models to examine the health effects. The results showed that the odds ratio for hypertension increased by 1.12 (95% confidence interval [CI], 1.08–1.16) per 19 &mgr;g/m3 increase in PM10, 1.11 (95% CI, 1.04–1.18) per 20 &mgr;g/m3 increase in SO2, and 1.13 (95% CI, 1.06–1.20) per 22 &mgr;g/m3 increase in O3. The estimated increases in mean systolic and diastolic blood pressure were 0.87 mm Hg (95% CI, 0.48–1.27) and 0.32 mm Hg (95% CI, 0.08–0.56) per 19 &mgr;g/m3 interquartile increase in PM10, 0.80 mm Hg (95% CI, 0.46–1.14) and 0.31 mm Hg (95% CI, 0.10–0.51) per 20 &mgr;g/m3 interquartile increase in SO2, and 0.73 mm Hg (95% CI, 0.35–1.11) and 0.37 mm Hg (95% CI, 0.14–0.61) per 22 &mgr;g/m3 interquartile increase in O3. These associations were only statistically significant in men. In conclusion, long-term exposure to PM10, SO2, and O3 was associated with increased arterial blood pressure and hypertension in the study population.

DIFFERENCES BETWEEN WOMEN AT HIGHER AND LOWER RISK FOR AN UNINTENDED PREGNANCY

CONTEXT Little is known about the preconception health status of women that are at risk for an unintended pregnancy. OBJECTIVE We hypothesized that women at high risk for an unintended pregnancy would engage in less healthy behaviors and would have fewer health care encounters than women at lower risk. DESIGN Using the Behavioral Risk Factor Surveillance System (2002 and 2004 datasets), we examined health factors of 18- to 44-year-old, fertile women who were not intending a pregnancy, grouped into high-risk (n=16,113) or low-risk (n=39,426) groups. Women were designated as high risk for an unintended pregnancy based on their non-use of birth control, and women were designated as low-risk for an unintended pregnancy based on their use of birth control. RESULTS Controlling for variables that mask or exacerbate relationships between risk factors and outcomes was an important component of this study. After controlling for the effects of demographic characteristics, we found that high-risk women remained 1.23 times more likely to be obese (confidence interval [CI], 1.12-1.34) and 1.2 times more likely to smoke (CI, 1.11-1.31), both significant findings. We also found high-risk women to be 27% less likely to exercise (CI, 0.67-0.79), 62% less likely to receive a Pap test (CI, 0.31-0.46), 19% less likely to have HIV testing (CI, 0.75-0.87), and 44% less likely to have received sexually transmitted diseases counseling (CI, 0.50-0.63) compared with low-risk women. Interestingly, high-risk women were 27% less likely to use any alcohol (CI, 0.67-0.79) and 11% less likely to binge drink (CI, 0.80-0.99) compared with women at low-risk for an unintended pregnancy. CONCLUSIONS Nearly one third of women at risk for an unintended pregnancy are not using any contraceptive method (29%), and these high-risk women also have higher proportions of unhealthy behaviors and significantly lower clinical health encounters than women using any form of birth control (low-risk women).

Exploring Pregnancy‐Related Changes in Alcohol Consumption Between Black and White Women

BACKGROUND Although epidemiological data indicate that White women are more likely to drink and binge drink before pregnancy, fetal alcohol syndrome (FAS) is more common in the Black population than among Whites in the United States. Differences in drinking cessation between Black and White women who become pregnant may help explain the disparity in FAS rates. METHODS The study sample was comprised of 280,126 non-Hispanic Black and White women, ages 18 to 44, from the Behavioral Risk Factor Surveillance System (BRFSS) 2001 to 2005 data sets. Predictors of reduction in alcohol consumption (in drinks per month) and binge drinking (>4 drinks on one occasion) by pregnant and non-pregnant women were identified with logistic regression. The effect of interactions of pregnancy status with age, education, and Black or White race on drinks per month and binge occasions were explored using analysis of variance (ANOVA). RESULTS Pregnant White women averaged 79.5% fewer drinks per month than non-pregnant White women (F = 1250.1, p < 0.001), and 85.4% fewer binge drinking occasions (F = 376, p < 0.001). Pregnant Black women averaged 58.2% fewer drinks per month than non-pregnant Black women (F = 31.8, p < 0.001) and 64.0% fewer binge occasions (F = 13.8, p < 0.001). Compared to Black women, White women appear to make a 38% greater reduction in drinks per month, and a 33% greater reduction in binge occasions. CONCLUSIONS Non-Hispanic White women appear more likely to reduce drinks per month and binge drinking occasions than non-Hispanic Black women during pregnancy. These findings may help explain disparities in FAS in the United States, though this cross-sectional sample does not permit claims of causation. To better describe the impact of differential drinking reduction on FAS rates, future studies of longitudinal data should be done.

Exploring Health by Reproductive Status: An Epidemiological Analysis of Preconception Health

BACKGROUND Recently published preconception health guidelines promote maternal health, yet adherence to those guidelines has not been documented. We hypothesized that pregnant women engaged in a healthier lifestyle than nonpregnant women, although this may vary by pregnancy intention and birth control method. METHODS We performed secondary analysis of cross-sectional data from the Behavioral Risk Factor Surveillance System (BRFSS) (2002 and 2004 datasets). The data are collected in all 50 states, the District of Columbia, Puerto Rico, the U.S. Virgin Islands, and Guam through a telephone survey of 350,000 adults annually. Subjects were a representative sample of noninstitutionalized, 18-44-year-old, fertile women (n = 66,152). Based on pregnancy risk, women were grouped into one of five categories: pregnant, intending pregnancy (IP), unintended pregnancy high risk (HR), moderate risk (MR), and low risk (LR). Logistic regression was used to estimate adjusted prevalence odds ratios (aPOR) and 95% confidence intervals (CI) for behavioral characteristics using pregnant women as the referent group. RESULTS IP, HR, MR, and LR women were more likely to drink any alcohol (aPOR 10.85, aPOR 8.39, aPOR 11.90, aPOR 11.98, respectively), binge drink (aPOR 7.07, aPOR 6.24, aPOR 7.27, aPOR 7.17, respectively), heavy drink (aPOR 6.90, aPOR 5.67, aPOR 7.48, aPOR 5.89, respectively), and smoke (aPOR 2.89, aPOR 2.69, aPOR 2.40, aPOR 2.09, respectively). Interestingly, IP, HR, MR, and LR women were more likely to engage in leisure activity (aPOR 1.37, aPOR 1.19, aPOR 1.57, aPOR 1.17, respectively). HR, MR, and LR women were less likely to consume folic acid (aPOR 0.14, aPOR 0.21, aPOR 0.29, respectively), whereas women intending a pregnancy were equally likely to consume folic acid (aPOR 0.77 CI 0.30, 2.0), although the response rate for folic acid was low. CONCLUSIONS Preconceptional health goals are not being met. Pregnancy risk, as delineated by contraceptive use, can inform interventions designed to prevent adversely exposed pregnancies.

Surveillance of Preconception Health Indicators in Behavioral Risk Factor Surveillance System: Emerging Trends in the 21st Century

OBJECTIVES This article assesses emerging trends in the 21st century, if any, in preconception health indicators among women of reproductive age. METHODS This is a secondary analysis of cross-sectional data from the Behavioral Risk Factor Surveillance System (BRFSS), 2003-2010. Subjects were a sample of noninstitutionalized, 18-44-year-old, nonpregnant, women in the United States (n=547,177) grouped into two categories, 2003-2006 (n=275,630) and 2007-2010 (n=271,547). Overall crude and adjusted prevalence odds ratios were calculated for preconception indicators before 2006 and after 2006. RESULTS Significant improvements were found for any and heavy alcohol use, smoking, social and emotional support, moderate/vigorous physical activity, and having had an influenza shot in the last year. In contrast, binge drinking, having a medical condition (i.e., diabetes, high blood pressure, asthma, or obesity), and self-reported health significantly worsened. No change was found for mental distress, HIV testing, and having a routine checkup. CONCLUSIONS As the 21st century unfolds, emerging trends suggest that we need to focus on educating women, providers, and public health advocates about improved health before pregnancy, especially for women with chronic conditions and those who binge drink alcohol.

Differences in pregnancy planning between women aged 18–44, with and without diabetes: Behavioral risk factor surveillance system analysis

AIM Assess differences in pregnancy planning and behavioral risk factors among women of reproductive age, by diabetes status. METHODS A secondary analysis of cross-sectional data from the Behavioral Risk Factor Surveillance System (2002 and 2004) was conducted. Subjects were 18-44-year-old, non-pregnant, fertile women, grouped into two categories: non-diabetes (n=57,436), and diabetes (n=2929). Multivariable logistic regression was used to estimate adjusted prevalence odds ratios and 95% confidence intervals. RESULTS Approximately 93% of women of reproductive age with or without diabetes are not intending a pregnancy, and yet among them, women with diabetes are 22% more likely not to use any birth control at all. Women with diabetes are 3.4 times more likely to be obese, 1.4 times more likely to be overweight, 35% less likely to drink any alcohol, and 27% less likely to binge drink alcohol, than women without diabetes. There were no differences in risk factors between women with diabetes that were and were not intending a pregnancy. CONCLUSIONS Birth control nonuse for women with diabetes not intending a pregnancy and lack of behavioral change for women with diabetes intending a pregnancy, combined with an increasing prevalence in diabetes, will likely result in significant economic and social tolls on society.

Residential characteristics and household risk factors and respiratory diseases in Chinese women: the Seven Northeast Cities (SNEC) study.

BACKGROUND Few studies have assessed the impact of residential home characteristics and home environmental risk factors on respiratory diseases in Chinese women. Therefore, this study sought to determine the association between residential home features, domestic pets, home renovation and other indoor environmental risk factors with respiratory health outcomes of Chinese women. METHODS This cross-sectional study included a study sample of 30,780 Chinese women aged 23 to 49 from 25 districts of seven cities in Liaoning Province, Northeast China. Information on respiratory health, residential characteristics, and indoor air pollution sources was obtained by a standard questionnaire from the American Thoracic Society. Multivariable logistic regression was used to estimate prevalence odds ratios (POR) and 95% confidence interval (95%CI). RESULTS The odds of respiratory diseases were higher for those who lived near the main road, or near ambient air pollution sources. Pet-keeping was associated with increased odds of chronic bronchitis (POR=1.40; 95%CI: 1.09-1.81) and doctor-diagnosed asthma (POR=2.07; 95%CI: 1.18-3.64). Additionally, humidifier use was associated with increased odds of chronic bronchitis (POR=1.44; 95%CI: 1.07-1.94). Home renovation in recent 2 years was associated with increased likelihood of allergic rhinitis (POR=1.39; 95%CI 1.17-1.64). CONCLUSION Home renovation and residential home environmental risk factors were associated with an increased likelihood of respiratory morbidity among Chinese women.

Effects of in utero and Postnatal Exposure to Secondhand Smoke on Lung Function by Gender and Asthma Status: The Seven Northeastern Cities (SNEC) Study

Background: Little information exists on whether gender or asthma status modifies the effects of secondhand smoke (SHS) exposure on lung function. Objective: To evaluate whether gender or asthma status modifies the association of SHS exposure with lung function. Methods: A total of 6,740 children (average 11.6 years) were recruited from 24 districts of 7 cities in northeast China in 2012. SHS exposure included exposure to environmental and maternal smoking both in utero and during early childhood (postnatal). Lung function was measured using electronic spirometers. Two-step regressions were used to analyze the association between SHS and lung function. Results: In utero and postnatal exposure to SHS was independently associated with decreased lung function in both genders; however, this association was greater among males. For example, when exposed to maternal smoking during pregnancy, the adjusted odds ratio (aOR) for decreased forced vital capacity (FVC) was 6.46 (95% confidence interval [CI]: 2.58-16.17) among males, while only 2.16 (95% CI: 0.96-4.88) among females. More positive associations between SHS exposure and decreased lung function were detected among nonasthmatic compared with asthmatic children. Nonasthmatics had significantly larger deficits from in utero exposure to maternal smoking, which concerned decreased lung FVC function (aOR = 2.58, 95% CI: 1.28-5.21) and decreased lung forced expiratory volume in 1 s (FEV1) function (aOR = 2.32, 95% CI: 1.01-5.33). A similar pattern was also observed for the associations between SHS exposure and continuous pulmonary function test measurements. Conclusions: SHS exposure was associated with decreased lung function. Males and nonasthmatics seem to be more susceptible than their respective counterparts.

Preconception wellness: differences in health by immigrant status.

Disparities in health between immigrant and non-immigrant pregnant women in the United States is well documented, but few have documented disparities before pregnancy. Using the National Health and Nutrition Examination Survey (1999–2006), we examined the health of reproductive-aged women (8,095), sorted by immigrant and pregnancy pregnant US-born (P-US), pregnant foreign-born (P-FB), non-pregnant US-born (NP-US), and non-pregnant foreignborn (NP-FB). P-US women were 5.2 times more likely to report illicit drug use than P-FB women. NP-US women were 3.7 times more likely to report illicit drugs use, 45% less likely to have a normal BMI, 2.0 times more likely to binge drink, 7.6 times more likely to smoke, 1.6 times more likely to engage in moderate physical activity, and 1.7 times more likely to use birth control than NP-FB women. The lower prevalence of numerous destructive health behaviors among preconceptional immigrant women is an important finding.

Very Low Birth Weight and Perinatal Periods of Risk: Disparities in St. Louis

Objective. Very low birth weight (VLBW) is a significant issue in St. Louis, Missouri. Our study evaluated risk factors associated with VLBW in this predominantly urban community. Methods. From 2000 to 2009, birth and fetal death certificates were evaluated (n = 160, 189), and mortality rates were calculated for perinatal periods of risk. The Kitagawa method was used to explore fetoinfant mortality rates (FIMR) in terms of birth weight distribution and birthweight specific mortality. Multivariable logistic regression was used to assess the magnitude of association of selected risk factors with VLBW. Results. VLBW contributes to 50% of the excess FIMR in St. Louis City and County. The highest proportion of VLBW can be attributed to black maternal race (40.6%) in St. Louis City, inadequate prenatal care (19.8%), and gestational hypertension (12.0%) among black women. Medicaid was found to have a protective effect for VLBW among black women (population attributable risk (PAR) = −14.5). Discussion. Interventions targeting the health of women before and during conception may be most successful at reducing the disparities in VLBW in this population. Interventions geared towards smoking cessation and improvements in Medicaid and prenatal care access for black mothers and St. Louis City residents can greatly reduce VLBW rates.