Care delivery and compensation system changes: a case study of organizational readiness within a large dental care practice organization in the United States.

BACKGROUND: Dental care delivery systems in the United States are consolidating and large practice organizations are becoming more common. At the same time, greater accountability for addressing disparities in access to care is being demanded when public funds are used to pay for care. As change occurs within these new practice structures, attempts to implement change in the delivery system may be hampered by failure to understand the organizational climate or fail to prepare employees to accommodate new goals or processes. Studies of organizational behavior within oral health care are sparse and have not addressed consolidation of current delivery systems. The objective of this case study was to assess organizational readiness for implementing change in a large dental care organization consisting of staff model clinics and affiliated dental practices and test associations of readiness with workforce characteristics and work environment. METHODS: A dental care organization implemented a multifaceted quality improvement program, called PREDICT, in which community-based mobile and clinic-based dental services were integrated and the team compensated based in part on meeting performance targets. Dental care providers and supporting staff members (N = 181) were surveyed before program implementation and organizational readiness for implementing change (ORIC) was assessed by two 5-point scales: change commitment and efficacy. RESULTS: Providers and staff demonstrated high organizational readiness for change. Median change commitment was 3.8 (Interquartile range [IQR]: 3.3-4.3) and change efficacy was 3.8 (IQR: 3.0-4.2). In the adjusted regression model, change commitment was associated with organizational climate, support for methods to arrest tooth decay and was inversely related to office chaos. Change efficacy was associated with organizational climate, support for the company's mission and was inversely related to burnout. Each unit increase in the organizational climate scale predicted 0.45 and 0.8-unit increases in change commitment and change efficacy. CONCLUSIONS: The survey identified positive readiness for change and highlighted weaknesses that are important cautions for this organization and others initiating change. Future studies will examine how organizational readiness to change, workforce characteristics and work environment influenced successful implementation within this organization.

Observed child and parent toothbrushing behaviors and child oral health.

BACKGROUND: Parent-led toothbrushing effectively reduces early childhood caries. Research on the strategies that parents use to promote this behavior is, however, lacking. AIM: To examine associations between parent-child toothbrushing interactions and child oral health using a newly developed measure, the Toothbrushing Observation System (TBOS). DESIGN: One hundred children ages 18-60 months and their parents were video-recorded during toothbrushing interactions. Using these recordings, six raters coded parent and child behaviors and the duration of toothbrushing. We examined the reliability of the coding system and associations between observed parent and child behaviors and three indices of oral health: caries, gingival health, and history of dental procedures requiring general anesthesia. RESULTS: Reliabilities were moderate to strong for TBOS child and parent scores. Parent TBOS scores and longer duration of parent-led toothbrushing were associated with fewer decayed, missing or filled tooth surfaces and lower incidence of gingivitis and procedures requiring general anesthesia. Associations between child TBOS scores and dental outcomes were modest, suggesting the relative importance of parent versus child behaviors at this early age. CONCLUSIONS: Parents' child behavior management skills and the duration of parent-led toothbrushing were associated with better child oral health. These findings suggest that parenting skills are an important target for future behavioral oral health interventions.

Treatment fidelity of brief motivational interviewing and health education in a randomized clinical trial to promote dental attendance of low-income mothers and children: Community-Based Intergenerational Oral Health Study "Baby Smiles".

BACKGROUND: Fidelity assessments are integral to intervention research but few published trials report these processes in detail. We included plans for fidelity monitoring in the design of a community-based intervention trial. METHODS: The study design was a randomized clinical trial of an intervention provided to low-income women to increase utilization of dental care during pregnancy (mother) or the postpartum (child) period. Group assignment followed a 2 × 2 factorial design in which participants were randomly assigned to receive either brief Motivational Interviewing (MI) or Health Education (HE) during pregnancy (prenatal) and then randomly reassigned to one of these groups for the postpartum intervention. The study setting was four county health departments in rural Oregon State, USA. Counseling was standardized using a step-by-step manual. Counselors were trained to criteria prior to delivering the intervention and fidelity monitoring continued throughout the implementation period based on audio recordings of counselor-participant sessions. The Yale Adherence and Competence Scale (YACS), modified for this study, was used to code the audio recordings of the counselors' delivery of both the MI and HE interventions. Using Interclass Correlation Coefficients totaling the occurrences of specific MI counseling behaviors, ICC for prenatal was .93, for postpartum the ICC was .75. Participants provided a second source of fidelity data. As a second source of fidelity data, the participants completed the Feedback Questionnaire that included ratings of their satisfaction with the counselors at the completion of the prenatal and post-partum interventions. RESULTS: Coding indicated counselor adherence to MI protocol and variation among counselors in the use of MI skills in the MI condition. Almost no MI behaviors were found in the HE condition. Differences in the length of time to deliver intervention were found; as expected, the HE intervention took less time. There were no differences between the overall participants' satisfaction ratings of the HE and MI sessions by individual counselor or overall (p > .05). CONCLUSIONS: Trial design, protocol specification, training, and continuous supervision led to a high degree of treatment fidelity for the counseling interventions in this randomized clinical trial and will increase confidence in the interpretation of the trial findings.

Health-related quality of life in children with intestinal failure.

OBJECTIVES: Survival of infants with intestinal failure (IF) has increased in the past decade; however, data on their health-related quality of life (HRQOL) are lacking. We hypothesized that HRQOL would be lower among children with IF compared with that of healthy children. METHODS: We performed a cross-sectional study of the HRQOL of children enrolled in the outpatient intestinal rehabilitation program at Seattle Children's Hospital using the PedsQL 4.0 Generic Core Scales parent proxy-report and the Family Impact Module questionnaires. Parents were asked 2 open-ended questions pertaining to the suitability and completeness of the PedsQL to assess their and their child's HRQOL. RESULTS: Parents of 23 children with IF completed the questionnaires. Compared with norms for healthy children, parents reported significantly lower total PedsQL scores for children ages 1 to 2 years (mean difference -13.16, 95% confidence interval [CI] -21.86 to -4.46; P = 0.003) and 2 to 6 years (mean difference -15.57, 95% CI -22.66 to -8.48; P < 0.001). Scores were also lower for children younger than 1 year (mean difference -6.43, 95% CI -13.93 to 1.07), although this test was not statistically significant. No measured demographic or clinical characteristics were associated with HRQOL. The majority of parents (65%) said the PedsQL failed to address important effects of IF on children and their families. CONCLUSIONS: Children with IF and their parents have a decreased HRQOL compared with healthy children as measured by the PedsQL survey. A disease-specific module or separate HRQOL questionnaire is needed for a more comprehensive assessment of HRQOL in children with IF.

Receipt of preventive oral health care by U.S. children: a population-based study of the 2005-2008 medical expenditure panel surveys.

This study provides estimates of the annual use of preventive oral health care by U.S. children ages 6 months-17 years. We estimated the annual use of preventive oral health care with data from the Medical Expenditure Panel Survey for the years 2005 through 2008 (n = 18,218). Additionally, we tested associations between use of preventive oral health care and predisposing factors, enabling factors and health need within three age groups: young children, school-age children and youth. Overall, 21 % of the sample was reported to have received preventive oral health care in the prior year. More school-age children received preventive care than did young children or youth regardless of gender, race/ethnicity, health status, residence, or family size. Among the youngest children, low parental education and lack of health insurance were associated with lower odds of receiving preventive care. School-age children of racial and ethnic minority groups had a higher odds of receiving preventive care than did non-Hispanic Whites. Youth with special health care needs were less likely to receive care than their peers. Within each age group, use of preventive care increased significantly from 2005 to 2008. In the U.S. there has been an increase in use of pediatric preventive dental care. Continued effort is needed to achieve primary prevention. Outreach and education should include all parents and especially parents with low levels of education, parents of children with special health care needs and those without health insurance.

County-level characteristics as predictors of dentists' ECC counseling in the USA: a survey study.

BACKGROUND: Transmission of Streptococcus mutans from mother-to-child can lead to Early Childhood Caries. A previous study identified characteristics and beliefs of general dentists about counseling pregnant women to reduce risk of infection and Early Childhood Caries. This study extends those findings with an analysis of county level factors. METHODS: In 2006, we surveyed 732 general dentists in Oregon, USA about dental care for pregnant women. Survey items asked about individual and practice characteristics. In the present study we matched those data to county level factors and used multinomial logistic regression to test the effects of the factors (i.e., dentist to population ratio, percentage of female dentists, percentage of females of childbearing age, and percentage of individuals living in poverty) on counseling behavior. RESULTS: County level factors were unrelated to counseling behavior when the models controlled for dentists' individual attitudes, beliefs, and practice level characteristics. The adjusted odds ratios for no counseling of pregnant patients (versus 100 percent counseling) were 1.1 (95% CI .8-1.7), 1.0 (1.0-1.1), 1.2 (.9-1.5), and 1.1 (1.0-1.2) for dentist/population ratio, percent female dentists, percent females of childbearing age, and percent in poverty, respectively Similar results were obtained when dentists who counseled some patients were compared to those counseling 100 percent of patients. CONCLUSIONS: Community level factors do not appear to impact the individual counseling behavior of general dentists in Oregon, USA regarding the risk of maternal transmission of Early Childhood Caries.

Design of a community-based intergenerational oral health study: "Baby Smiles".

BACKGROUND: Rural, low-income pregnant women and their children are at high risk for poor oral health and have low utilization rates of dental care. The Baby Smiles study was designed to increase low-income pregnant women's utilization of dental care, increase young children's dental care utilization, and improve home oral health care practices. METHODS/DESIGN: Baby Smiles was a five-year, four-site randomized intervention trial with a 2 × 2 factorial design. Four hundred participants were randomly assigned to one of four treatment arms in which they received either brief Motivational Interviewing (MI) or health education (HE) delivered during pregnancy and after the baby was born. In the prenatal study phase, the interventions were designed to encourage dental utilization during pregnancy. After childbirth, the focus was to utilize dental care for the infant by age one. The two primary outcome measures were dental utilization during pregnancy or up to two months postpartum for the mother, and preventive dental utilization by 18 months of age for the child. Medicaid claims data will be used to assess the primary outcomes. Questionnaires were administered at enrollment and 3, 9 and 18 months postpartum (study end) to assess mediating and moderating factors. DISCUSSION: This trial can help define the most effective way to provide one-on-one counseling to pregnant women and new mothers regarding visits to the dentist during pregnancy and after the child is born. It supports previous work demonstrating the potential of reducing mother-to-child transmission of Streptococcus mutans and the initiation of dental caries prevention in early childhood. TRIAL REGISTRATION: ClinicalTrials.gov Identifier NCT01120041.

Oral health need and access to dental services: evidence from the National Survey of Children's Health, 2007.

This study examines associations between parents' report of their children's oral health and receipt of a dental visit for preventive care. We conducted a cross-sectional analysis of oral health status and receipt of a preventive dental visit among US children and youth, ages 1-17 years, using data from the 2007 National Survey of Children's Health (n = 86,764). Survey-weighted logistic regression was used to estimate associations between perceived oral health status and receipt of a preventive dental health visit in the prior 12 months. Overall, 78 % of children and youth received at least one preventive dental health visit in the prior year. Among the youngest children, lower oral health status was associated with higher odds of receiving a preventive dental visit; among older children, lower oral health status was associated with lower odds of receiving a dental visit for preventive care. Use of preventive dental health care is below national target goals. Younger children in worse oral health are more likely, and older youth less likely, to receive preventive dental care. Public health efforts to educate parents to seek early and ongoing preventive oral health care, rather than services in response to problems, may yield oral health benefits later in childhood and over the life course.

Our community in focus: the use of photovoice for youth-driven substance abuse assessment and health promotion.

The successful development and implementation of prevention curricula requires seeking strategies that combine the strengths of researchers and community members. Because young people are considered to be the experts in their own lives, it is important to determine effective ways to engage them in substance abuse assessment and prevention initiatives. The community-based participatory action research methodology of photovoice is one way to engage youth in assessment of this public health issue. "Our Community in Focus" was a project that used the photovoice methodology to engage high school youth in a community-based assessment of adolescent substance use and abuse. Through the photovoice method, youth were able to reflect their community's strengths and concerns with regards to adolescent substance abuse, as they took photographs to answer the question "What contributes to adolescents' decisions to use or not to use alcohol and other drugs?" The youth and the community were highly receptive to the project and its methodology, and photographs taken by photovoice participants presented a compelling argument for action.

Beyond word recognition: understanding pediatric oral health literacy.

PURPOSE: Parental oral health literacy is proposed to be an indicator of children's oral health. The purpose of this study was to test if word recognition, commonly used to assess health literacy, is an adequate measure of pediatric oral health literacy. This study evaluated 3 aspects of oral health literacy and parent-reported child oral health. METHODS: A 3-part pediatric oral health literacy inventory was created to assess parents' word recognition, vocabulary knowledge, and comprehension of 35 terms used in pediatric dentistry. The inventory was administered to 45 English-speaking parents of children enrolled in Head Start. RESULTS: Parents' ability to read dental terms was not associated with vocabulary knowledge (r=0.29, P<.06) or comprehension (r=0.28, P>.06) of the terms. Vocabulary knowledge was strongly associated with comprehension (r=0.80, P<.001). Parent-reported child oral health status was not associated with word recognition, vocabulary knowledge, or comprehension; however parents reporting either excellent or fair/poor ratings had higher scores on all components of the inventory. CONCLUSIONS: Word recognition is an inadequate indicator of comprehension of pediatric oral health concepts; pediatric oral health literacy is a multifaceted construct. Parents with adequate reading ability may have difficulty understanding oral health information.

Pediatric vaccination and vaccine-preventable disease acquisition: associations with care by complementary and alternative medicine providers.

This study investigated provider-based complementary/alternative medicine use and its association with receipt of recommended vaccinations by children aged 1-2 years and with acquisition of vaccine-preventable disease by children aged 1-17 years. Results were based on logistic regression analysis of insurance claims for pediatric enrollees covered by two insurance companies in Washington State during 2000-2003. Primary exposures were use of chiropractic, naturopathy, acupuncture, or massage practitioner services by pediatric enrollees or members of their immediate families. Outcomes included receipt by children aged 1-2 years of four vaccine combinations (or their component vaccines) covering seven diseases, and acquisition of vaccine-preventable diseases by enrollees aged 1-17 years. Children were significantly less likely to receive each of the four recommended vaccinations if they saw a naturopathic physician. Children who saw chiropractors were significantly less likely to receive each of three of the recommended vaccinations. Children aged 1-17 years were significantly more likely to be diagnosed with a vaccine-preventable disease if they received naturopathic care. Use of provider-based complementary/alternative medicine by other family members was not independently associated with early childhood vaccination status or disease acquisition. Pediatric use of complementary/alternative medicine in Washington State was significantly associated with reduced adherence to recommended pediatric vaccination schedules and with acquisition of vaccine-preventable disease. Interventions enlisting the participation of complementary/alternative medicine providers in immunization awareness and promotional activities could improve adherence rates and assist in efforts to improve public health.

Estimating determinants of dentist productivity: new evidence.

OBJECTIVE: Productivity (output per unit of input) is a major driver of dental service capacity. This study uses 2006-2007 data to update available knowledge on dentist productivity. METHODS: In 2006-2007, the authors surveyed 1,604 Oregon general dentists regarding-hours worked, practice size, payment and patient mix, prices, dentist visits, and dentist characteristics. Effects of practice inputs and other independent variables on productivity were estimated by multiple regression and path analysis. RESULTS: The survey response rate was 55.2 percent. Dentists responding to the productivity-related questions were similar to dentists in the overall sampling frame and nationwide. Visits per week are significantly positively related to dentist hours worked, number of assistants, hygienists, and number of operatories. Dentist ownership status, years of experience, and percentage of Medicaid patients are significantly positively related to practice output. The contributions of dentist chairside time and assistants to additional output are smaller for owners, but the number of additional dentist visits enabled by more hygienists is larger for owners. CONCLUSION: As in earlier studies of dental productivity, the key determinant of dentist output is the dentist's own chairside time. The incremental contributions of dentist time, auxiliaries, and operatories to production of dentist visits have not changed substantially over the past three decades. Future studies should focus on ultimate measures of output--oral health--and should develop more precise measures of the practice's actual utilization of auxiliaries and their skill and use of technology.

Behavioral determinants of brushing young children's teeth: implications for anticipatory guidance.

PURPOSE: The purposes of this study were to identify parents' motivation, support, and barriers to twice daily tooth-brushing of infants and preschool-age children and to discover new approaches to encourage this important health behavior. METHODS: Qualitative interviews were conducted with 44 rural parents about tooth-brushing habits and experiences. RESULTS: Forty of 44 parents reported that they had begun to brush their child's teeth; 24 (55%) reported brushing twice a day or more. Parents who brushed twice a day, vs less often, were more likely to describe specific skills to overcome barriers; they expressed high self-efficacy and held high self-standards for brushing. Parents who brushed their children's teeth less than twice daily were more likely to: hold false beliefs about the benefits of twice daily tooth-brushing; report little normative pressure or social support for the behavior; have lower self-standards; describe more external constraints; and offer fewer ideas to overcome barriers. CONCLUSIONS: The findings support an integrative framework in which barriers and support for parents' twice daily brushing of their young children's teeth are multiple and vary among individuals. Knowledge of behavioral determinants specific to individual parents could strengthen anticipatory guidance and recommendations about at-home oral hygiene of young children.

Parents' Satisfaction with Silver Diamine Fluoride Treatment of Carious Lesions in Children.

Purpose: Current national evidence-based recommendations for treatment of carious lesions include the use of 38 percent silver diamine fluoride (SDF). The purpose of this study was to learn parents' opinions of esthetic changes to their children's teeth following treatment with SDF.
Methods: Three-hundred nineteen parents who had previously consented to SDF for caries arrest or caries prevention were asked if their child received SDF, if they noticed changes because of SDF, and how "bothered" they were by the changes.
Results: Two-hundred ten parents reported their child received SDF in the past 12 months, of whom 76 percent were confirmed by Codes on Dental Procedures and Nomenclature (CDT): 115 children received SDF for caries arrest and 45 received topical fluoride (SDF) for prevention. Of all 210 who reported SDF, 30 percent described discoloration of their child's teeth or gingiva. On a scale of zero (not bothered at all by changes due to SDF) to 10 (very bothered), parents' average rating was 1.2 ipoints; the average within the caries arrest group was 1.7.
Conclusion: Dental treatment requires a shared decision between parents and professionals, and follow-up regarding new procedures is warranted. In this study, treatment with SDF was well accepted by most parents.

Providing dental care to pregnant patients: a survey of Oregon general dentists.

BACKGROUND: A growing number of studies and reports indicate preventive, routine and emergency dental procedures can be provided safely to pregnant patients to alleviate dental problems and promote oral health of mothers and children. METHODS: In 2006 and 2007, the authors conducted a survey of 1,604 general dentists in Oregon. The survey asked dentists about their attitudes, beliefs and practices regarding dental care for pregnant patients. The authors compared the responses with 2006 guidelines from a New York State Department of Health expert panel. RESULTS: The response rate was 55.2 percent. Most respondents (91.7 percent) agreed that dental treatment should be part of prenatal care. Two-thirds of respondents (67.7 percent) were interested in receiving continuing dental education (CDE) regarding the care of pregnant patients. Comparisons of self-reported knowledge and practice with the aforementioned guidelines revealed several points of difference; the greatest regarded obtaining full-mouth radiographs, providing nitrous oxide, administering long-acting anesthetic injections and use of over-the-counter pain medications. CONCLUSIONS: Dentists need pregnancy-specific education to provide up-to-date preventive and curative care to pregnant patients. The results of the study identified specific skills and misinformation that could be addressed through CDE. CLINICAL IMPLICATIONS: Comprehensive dental care provided during pregnancy is needed to ensure the oral health of all women at risk of experiencing pregnancy-specific problems, as well as the prevention of early childhood caries.

Beyond access: the role of family and community in children's oral health.

Children's health outcomes result from the complex interaction of biological determinants with sociocultural, family, and community variables. Dental professionals' efforts to reduce oral health disparities often focus on improving access to dental care. However, this strategy alone cannot eliminate health disparities. Rising rates of early childhood caries create an urgent need to study family and community factors in oral health. Using Los Angeles as a multicultural laboratory for understanding health disparities, the Santa Fe Group convened an experiential conference to consider models of ensuring child and family health within communities. This article summarizes key conference themes and insights regarding 1) children's needs and societal priorities; 2) the science of child health determinants; 3) the rapidly changing demographics of the United States; and 4) the importance of communities that support children and families. Conference participants concluded that to eliminate children's oral health disparities we must change paradigms to promote health, integrate oral health into other health and social programs, and empower communities. Oral health advocates have a key role in ensuring oral health is integrated into policy for children. Dental schools have a leadership role to play in expanding community partnerships and providing education in health determinants. Participants recommended replicating this experiential conference in other venues.

Ethics Rounds: Death After Pediatric Dental Anesthesia: An Avoidable Tragedy?

Early childhood caries (ECC) is the single most common chronic childhood disease. In the treatment of ECC, children are often given moderate sedation or general anesthesia. An estimated 100 000 to 250 000 pediatric dental sedations are performed annually in the United States. The most common medications are benzodiazepines, opioids, local anesthetics, and nitrous oxide. All are associated with serious adverse events, including hypoxemia, respiratory depression, airway obstruction, and death. There is no mandated reporting of adverse events or deaths, so we don't know how often these occur. In this article, we present a case of a death after dental anesthesia and ask experts to speculate on how to improve the quality and safety of both the prevention and treatment of ECC.

Everybody Brush! Consumer Satisfaction with a Tooth Decay Prevention Program.

INTRODUCTION: Twice-daily caregiver-supervised toothbrushing with fluoridated toothpaste is an effective and widely recommended strategy to prevent tooth decay in children. Qualitative research suggests that low-income caregivers know the recommendation but would benefit from toothbrushing supplies and advice about how to introduce this health behavior especially as the child becomes older and asserts autonomy to do it "myself." Our objective is to assess consumer satisfaction with the evidence-based theory-informed campaign and usefulness of materials that were home delivered. The focus of the evaluation was families with children <36 months of age because of the high incidence of disease in this population. METHODS: A dental care organization designed and implemented Everybody Brush! in three counties of Central Oregon. Participants were families of Medicaid-insured children <21 years of age. Participants were randomly assigned to one of the three study groups: test (supplies, voice/printed messages, telephone support), active (supplies), and a waitlist control. Program materials were in English and Spanish. Caregivers of children <36 months were interviewed at the beginning and end of the program. RESULTS: A total of 83,148 toothbrushing kits were mailed to 21,743 families. In addition, 93,766 printed messages and 110,367 recorded messages were sent to half of the families. Caregivers were highly satisfied. On a global rating scale from 0 to 10 (worst to best program possible), they rated the program 9.5 on average (median: 10, SD 0.9). On a scale from 0 to 10 (not at all to very useful), mean ratings for usefulness of the toothbrushing supplies was 9.5 (SD = 1.5), for the printed postcard messages was 7.2 (SD 3.6), and for the voice telephone messages was 6.5 (SD 3.9). DISCUSSION: A dental care organization carried out a complex community intervention designed to address excess tooth decay among low-income children. Caregivers were highly satisfied with the Everybody Brush! program and toothbrushing supplies were considered the most useful, followed by printed messages. Voice telephone messages were rated least useful. Further evaluation of the impact of the program on toothbrushing behavior and dental-care utilization is underway.

Healthy steps in an integrated delivery system: child and parent outcomes at 30 months.

OBJECTIVE: To test the effects of the Healthy Steps for Young Children program (HS) (which supports parents managing children's developmental and behavioral issues)-with and without a prenatal component-on child health and development, parenting practices, and parental well-being. DESIGN: A concurrent comparison with clinic-level assignment to intervention or usual care status. Nested in the intervention arm, a randomized trial compared HS with and without a prenatal component. SETTING: Five primary care clinics in an integrated delivery system in the Pacific Northwest. PARTICIPANTS: A consecutive sample of 439 pregnant women (80% of eligible) were enrolled. Follow-up data were obtained for 78% when the child was 30 months old. Intervention Families in intervention clinics received HS services, including developmental and behavioral advice and risk factor screening. In addition, those randomized to prenatal services received 3 home visits during pregnancy. MAIN OUTCOME MEASURES: Assessed by telephone interview in the 3 domains of child health and development, parenting practices, and parental well-being. RESULTS: Intervention was associated with positive outcomes in timely well-child care, immunization rates, breastfeeding, television viewing, injury prevention, and discipline strategies. Prenatal initiation of services was associated with larger expressive vocabularies at age 24 months. Mothers who received the intervention reported more depressive symptoms, but there was no increase in the proportion with clinically significant depression. CONCLUSIONS: For members of an integrated delivery system, the HS intervention was associated with positive effects on children's health and parenting practices. There was little evidence of any additional benefit of HS services initiated during the prenatal period.

Birth outcomes among urban African-American women: a multilevel analysis of the role of racial residential segregation.

Residential segregation is a common aspect of the urban experiences of African-Americans in the United States (US), yet few studies have considered how segregation might influence perinatal health. Here, we develop a conceptual model of relationships between segregation and birth outcomes and test the implications of the model in a sample of 434,376 singleton births to African-American women living in 225 US Metropolitan Statistical Areas (MSAs). Data from the National Center for Health Statistics 2002 birth files were linked to data from the 2000 US Census and two distinct measures of segregation: an index of isolation (the probability that an African-American resident will encounter another African-American resident in any random neighborhood encounter) and an index of clustering (the extent to which African-Americans live in contiguous neighborhoods). Using multilevel regression models, controlling for individual- and MSA-level socioeconomic status and other covariates, we found higher isolation was associated with lower birthweight, higher rates of prematurity and higher rates of fetal growth restriction. In contrast, higher clustering was associated with more optimal outcomes. We propose that isolation reflects factors associated with segregation that are deleterious to health including poor neighborhood quality, persistent discrimination and the intra-group diffusion of harmful health behaviors. Associations with clustering may reflect factors associated with segregation that are health-promoting such as African-American political power empowerment, social support and cohesion. Declines in isolation could represent positive steps toward improving birth outcomes among African-American infants while aspects of racial contiguity appear to be mitigating or indeed beneficial. Segregation is a complex multidimensional construct with both deleterious and protective influences on birth outcomes, depending on the dimensions under consideration. Further research to understand racial/ethnic and economic health disparities could benefit from a focus on the contributory role of neighborhood attributes associated with the dimensions segregation and other social geographies.