Michael Weitzman

Lead-contaminated house dust and urban children's blood lead levels.

OBJECTIVES This study assessed the relationship between lead-contaminated house dust and urban childrens blood lead levels. METHODS A random-sample survey was used to identify and enroll 205 children, 12 to 31 months of age, who had resided in the same house since at least 6 months of age. Childrens blood and household dust, water, soil, and paint were analyzed for lead, and interviews were conducted to ascertain risk factors for elevated blood lead (> or = 10 micrograms/dL). RESULTS Childrens mean blood lead level was 7.7 micrograms/dL. In addition to dust lead loading (micrograms of lead per square foot), independent predictors of childrens blood lead were Black race, soil lead levels, ingestion of soil or dirt, lead content and condition of painted surfaces, and water lead levels. For dust lead standards of 5 micrograms/sq ft, 20 micrograms/sq ft, and 40 micrograms/sq ft on noncarpeted floors, the estimated percentages of children having blood lead levels at or above 10 micrograms/dL were 4%, 15%, and 20%, respectively, after adjusting for other significant covariates. CONCLUSIONS Lead-contaminated house dust is a significant contributor to lead intake among urban children who have low-level elevations in blood lead. A substantial proportion of children may have blood lead levels of at least 10 micrograms/dL at dust lead levels considerably lower than current standards.

Do Parenting and the Home Environment, Maternal Depression, Neighborhood, and Chronic Poverty Affect Child Behavioral Problems Differently in Different Racial-Ethnic Groups?

OBJECTIVE. To determine whether the processes through which parenting practices, maternal depression, neighborhood, and chronic poverty affect child behavioral problems are similar or different in minority and nonminority children in the United States. METHODS. Data from 884 white, 538 black, and 404 Latino families with children who were 6 to 9 years of age in the National Longitudinal Survey of Youth were analyzed. The outcome, child behavioral problems, was measured using the Behavior Problems Index externalizing and internalizing subscales. The effects of chronic poverty, neighborhood, maternal depression, and parenting on the outcome were analyzed using multigroup structural equation modeling. RESULTS. Chronic poverty affected child behavioral problems indirectly through the other variables, and parenting practices had direct effects in each racial/ethnic group. The effects of maternal depression were partially mediated through parenting in the white and Latino samples but were direct and unmediated through parenting practices in the black sample. Neighborhood effects were present in the white and black samples but were not significant for the Latino sample. CONCLUSIONS. Chronic poverty, neighborhood, maternal depression, and parenting practices have effects on child behavioral problems in white, black, and Latino children, but the processes and mechanisms through which they exert their effects differ among the groups. The differences may be related to social stratification mechanisms as well as sociocultural differences in family and childrearing practices.

Elevated blood pressure and decreased cognitive function among school-age children and adolescents in the United States

OBJECTIVE To evaluate the relationship between elevated blood pressure (BP) and cognitive test performance in a nationally representative sample of children. Study design The National Health and Nutrition Examination Survey III provides cross-sectional data for children 6 to 16 years, including BP and cognitive test scores. Elevated BP was defined as systolic or diastolic BP >or=90th percentile. Cognitive tests were compared for children with elevated and normal BP. Linear regression was used to evaluate the relation between elevated BP and decreased test scores. RESULTS Among the 5077 children, 3.4% had systolic BP >or=90th percentile and 1.6% diastolic BP >or=90th percentile. Children with elevated systolic BP had lower average scores compared with normotensive children for digit span (7.9 vs 8.7, P=.01), block design (8.6 vs 9.5, P=.03), and mathematics (89.6 vs 93.8, P=.01). Elevated diastolic BP was associated with lower average scores on block design (9.5 vs 11, P=.01). Linear regression showed that elevated systolic BP was independently associated with lower digit span scores (P=.032). CONCLUSION Children with elevation of systolic BP are at risk for central nervous system end-organ damage, as manifested by decreased digit span test scores.

Screening and Counseling Associated With Obesity Diagnosis in a National Survey of Ambulatory Pediatric Visits

Objective. To examine clinician-reported diagnosis of obesity and frequency of blood pressure assessment and diet and exercise counseling during ambulatory visits made by children and adolescents. Methods. The National Ambulatory Medical Care Survey and National Hospital Ambulatory Medical Care Survey 1997 to 2000 were combined for visits to clinicians of 2- to 18-year-olds. Well-child visits (WCVs) were examined for frequencies of obesity diagnosis, blood pressure screening, and diet and exercise counseling in relation to patient and clinician characteristics. Multivariate models examined the relationship of patient and visit characteristics with diet and exercise counseling. Results. Of the 32 930 ambulatory visits made by 2- to 18-year-olds in 1997–2000, obesity was diagnosed at 0.78% of all visits and 0.93% of WCVs. Blood pressure assessment was reported in 61.1% of WCVs with obesity diagnosis compared with 43.9% of WCVs without obesity diagnosis. WCVs with obesity diagnosis had higher diet counseling rates (88.4% vs 35.7%) and higher exercise counseling rates (69.2% vs 18.6%). Diet counseling was reported for 88.4% and exercise counseling was reported for 69.2% of visits with an obesity diagnosis compared with 35.7% and 18.6% during WCVs without a diagnosis of obesity. In multivariate analyses, factors associated with diet counseling at WCVs were diagnosis of obesity (odds ratio [OR]: 12.9; 95% confidence interval [CI]: 3.0–55.3), being seen by pediatricians (OR: 2.5; 95% CI: 1.6–3.9), 2- to 5-year-olds compared with 12- to 18-year-olds (OR: 0.7; 95% CI: 0.5–1.0), and self-pay compared with private insurance visits (OR: 0.6; 95% CI: 0.4–0.9). Associations with exercise counseling were similar to those for diet counseling, but exercise counseling occurred less frequently in visits by black youths compared with white youths (OR: 0.5; 95% CI: 0.3–0.8). Conclusions. Clinicians may overlook obesity during WCVs. Programs to increase obesity diagnosis could improve diet and exercise counseling rates, but even with diagnosis of obesity, significant opportunities for screening and intervention are missed.

The effects of tobacco exposure on children's behavioral and cognitive functioning: - Implications for clinical and public health policy and future research

A growing body of literature indicates that maternal smoking during pregnancy is associated with neurotoxic effects on children. Both animal model studies and human epidemiologic studies demonstrate similar effects in terms of increased activity, decreased attention, and diminished intellectual abilities. Epidemiologic studies also suggest that prenatal tobacco exposure is associated with higher rates of behavior problems and school failure. These findings are explored and their implications for child health policy and practice, and for research, are discussed.

Office prenatal formula advertising and its effect on breast-feeding patterns

Objective To compare the effect of formula company–produced materials about infant feeding to breast-feeding promotion materials without formula advertising on breast-feeding initiation and duration. Methods Five hundred forty-seven pregnant women were randomized to receive either formula company (commercial; n = 277) or specially designed (research; n = 270) educational packs about infant feeding at their first prenatal visit. Feeding method was determined at delivery. Breast-feeding duration of the 294 women who chose to breast-feed was ascertained at 2, 6, 12, and 24 weeks. Survival analyses were used to evaluate continuous outcomes, and χ2 and logistic regression analyses were used to evaluate discrete outcomes. Results Breast-feeding initiation (relative risk [RR] 0.93, 95% confidence interval [CI] 0.61, 1.43) and duration after 2 weeks (hazard ratio 1.19, 95% CI 0.86, 1.64) were not affected. Women in the commercial group were more likely to cease breast-feeding before hospital discharge (RR 5.80, 95% CI 1.25, 54.01) and before 2 weeks (adjusted odds ratio [OR] 1.91, 95% CI 1.02, 3.55). In subgroup analyses, women with uncertain goals for breast-feeding or goals of 12 weeks or less experienced shortened exclusive (hazard ratio 1.53, 95% CI 1.06, 2.21), full (hazard ratio 1.70, 95% CI 1.18, 2.48), and overall (hazard ratio 1.75, 95% CI 1.16, 2.64) breast-feeding duration when exposed to the commercial intervention. Conclusion Although breast-feeding initiation and long-term duration were not affected, exposure to formula promotion materials increased significantly breast-feeding cessation in the first 2 weeks. Additionally, among women with uncertain goals or breast-feeding goals of 12 weeks or less, exclusive, full, and overall breast-feeding duration were shortened. Educational materials about infant feeding should support unequivocally breast-feeding as optimal nutrition for infants; formula promotion products should be eliminated from prenatal settings.

Chronic Illness, Psychosocial Problems, and School Absences: Results of a Survey of One County

The number of days absent from school during the 1979-80 school year for 573 children aged 6-17 years in Berkshire County, Massachusetts was ascertained by parent reporting in a random household survey. Children with a wide range of chronic health impairments were reported as missing more school than their healthy peers (8.7 days vs. 5.8, p < .001). Although there was a trend for children reported as having functional impairments to miss more school than those with chronic conditions without functional impairments (11.0 vs. 8.1), the difference was not statistically significant. Children with a variety of reported psychosocial difficulties missed more school than those without psychosocial difficulties for the sample as a whole and for those with reported chronic conditions. These findings document support for the assumption that children with a wide range of physical and psychological problems miss more school than their healthy peers and illustrate that the etiology of school absences is multifactoral and reflects behavioral as well as purely physical phenomena.

Use of health services by chronically ill and disabled children.

Hospitalization and use of outpatient health care services during a 1-year period by 369 pediatric patients with cystic fibrosis, cerebral palsy, myelodysplasia, or multiple physical handicaps and 456 randomly selected children without congenital conditions from the Cleveland area were examined. Use of hospitalization and outpatient services by the average chronically ill or disabled child was 10 times that of the average comparison child. Physician specialists, occupational and physical therapists, and school nurses were the major outpatient categories used disproportionately by children with chronic illnesses or disabilities. The major share of health care used by children with chronic conditions was attributable to a small subset of children; All hospital care was accounted for by one third of the children, and three quarters of all outpatient care was accounted for by one quarter of that sample. Hospital care was used at similar rates by the four diagnostic groups. However, amount and type of outpatient care varied by diagnosis, level of functional impairment, race, and income. Estimated average expenditure for health services used by the chronically ill or disabled sample was 10 times that of the comparison sample. Relative distribution of estimated expenditures across types of services differed for the two samples as well as among diagnostic categories.

Where do adolescents get their condoms

PURPOSE To determine where adolescents obtain their condoms; the availability and accessibility of condoms; condom availability in relationship to different sexually transmitted disease (STD) rates; and the availability of safer sex information in places where condoms are sold. METHODS We conducted a random digit-dialed telephone survey of 259 14-19-year-old adolescents in Monroe County, New York. Self-reported health services use, knowledge and use of confidential services, and where adolescents obtained or intended to obtain condoms were assessed. Research assistants visited all retail establishments in five areas of similar population size with gonorrhea rates from 887 to 12,427 per 100,000 adolescents to assess how available and accessible condoms were in each store. Perceived access and actual condom availability and accessibility were compared using Chi-square and Students t-tests. RESULTS Trained interviewers dialed 11,800 numbers in 1993, identifying 4449 (40%) households among 11,065 numbers reached successfully. Of these, 393 (8.8%) had eligible adolescents and 259 (66%) completed interviews. Most adolescents reported obtaining, or planning to obtain, condoms in stores rather than from free health care settings. Adolescents who have used condoms more often reported having obtained them without cost than having purchased them. Condoms were available at 101 (83%) of 122 stores identified. All drug stores and 75% of supermarkets sold condoms and displayed them openly. Most small grocery stores also sold condoms (92%), but were less likely to openly display them. No stores displayed or provided safer sex information. Areas with higher STD rates had more stores (p <.01), and more stores that sold condoms (p <.01). There was no difference in condom cost by area. CONCLUSIONS Many adolescents obtain their condoms in retail stores. Condom accessibility varied by store type and area STD rate. Increasing condom visibility in private grocery stores may increase the accessibility of condoms to adolescents in areas with highest STD rates.

Why screen newborns for cocaine: service patterns and social outcomes at age one year

OBJECTIVE To compare baseline characteristics, service provision, and child placement for infants exposed to cocaine in utero based on postnatal screening results. METHODS We studied a retrospective cohort of 40 consecutive drug-exposed, but seemingly healthy term infants who underwent urine drug screening in the newborn nursery of a community hospital. Using clinical and service agency data, two cocaine-exposed cohorts were compared (a) screen-positive at birth (n = 22) versus (b) screen-negative at birth (n = 18). RESULTS Both cocaine-exposed groups had similar infant birth weights, levels of paternal involvement, maternal ages, gravidity, parity, and lengths of gestation. Mothers in both groups had similar histories of prostitution, poor home environment, drug use, and prenatal drug rehabilitation. Mothers of screen-positive infants were more likely than mothers of screen-negative infants to have other children in foster care (27% vs. 6%, p = .07), to have experienced previous interventions by child protective services (CPS) (55% vs. 17%, p < .01), to have had no prenatal care (32% vs. 6%, p = .09), and fewer prenatal visits (4.7 vs. 8.6, p = .02). Compared to screen-negative infants, more screen-positive infants were referred to a high-risk infant tracking program (91% vs. 6%), referred to CPS (100% vs. 33%), placed outside the mothers home (50% vs. 22%), and had their mothers referred to drug rehabilitation (36% vs. 11%), (p < .01 for each). By 1 year of age, support services differed little between exposed cohorts. However, 6 of 22 screen-positive infants were in foster care and 3 were placed for adoption, while only 1 of the 18 screen-negative infants was in foster care and only 1 had been placed for adoption. There were no services available in this community to provide coordinated or comprehensive services or drug treatment specific to the needs of drug using mothers and drug exposed infants. CONCLUSIONS Despite similarities between cocaine-exposed infants cared for in a normal newborn setting (with and without positive urine drug screens at birth), differences in referral services were noted. More striking than these differences was that services for families with drug-exposed infants are inadequate to even meet the needs of those families in our setting deemed to be at highest risk. Neonatal drug screening needs to be paired with effective services.