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Dive into the research topics where Katherine Kaufer Christoffel is active.

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Featured researches published by Katherine Kaufer Christoffel.


Journal of Developmental and Behavioral Pediatrics | 1999

Sleep and behavior problems among preschoolers.

John V. Lavigne; Richard Arend; Diane Rosenbaum; Andy Smith; Marc Weissbluth; Helen J. Binns; Katherine Kaufer Christoffel

This study described the relationship between amount of sleep and behavior problems among preschoolers. Participants were 510 children aged 2 to 5 years who were enrolled through 68 private pediatric practices. Parents reported on the amount of sleep their child obtained at night and in 24-hour periods. With demographic variables controlled, regression models were used to determine whether sleep was associated with behavior problems. The relationship between less sleep at night and the presence of a DSM-III-R psychiatric diagnosis was significant (odds ratio = 1.23, p = .026). Less night sleep (p < .0001) and less sleep in a 24-hour period (p < .004) were associated with increased total behavior problems on the Child Behavior Checklist; less night sleep (p < .0002) and less 24-hour sleep (p < .004) were also associated with more externalizing problems on that measure. Further research is needed to ascertain whether sleep is playing a causal role in the increase of behavior problems.


JAMA Pediatrics | 2011

Effect of Neuromuscular Warm-up on Injuries in Female Soccer and Basketball Athletes in Urban Public High Schools: Cluster Randomized Controlled Trial

Cynthia R. LaBella; Michael R. Huxford; Joe Grissom; Kwang-Youn Kim; Jie Peng; Katherine Kaufer Christoffel

OBJECTIVE To determine the effectiveness of coach-led neuromuscular warm-up on reducing lower extremity (LE) injuries in female athletes in a mixed-ethnicity, predominantly low-income, urban population. DESIGN Cluster randomized controlled trial. SETTING Chicago public high schools. PARTICIPANTS Of 258 coaches invited to participate, 95 (36.8%) enrolled (1558 athletes). Ninety coaches and 1492 athletes completed the study. INTERVENTIONS We randomized schools to intervention and control groups. We trained intervention coaches to implement a 20-minute neuromuscular warm-up. Control coaches used their usual warm-up. MAIN OUTCOME MEASURES Coach compliance was tracked by self-report and direct observation. Coaches reported weekly athlete exposures (AEs) and LE injuries causing a missed practice or game. Research assistants interviewed injured athletes. Injury rates were compared between the control and intervention groups using χ(2) and Fisher exact tests. Significance was set at P < .05. Poisson regression analysis adjusted for clustering and covariates in an athlete subset reporting personal information (n = 855; 57.3%). RESULTS There were 28 023 intervention AEs and 22 925 control AEs. Intervention coaches used prescribed warm-up in 1425 of 1773 practices (80.4%). Intervention athletes had lower rates per 1000 AEs of gradual-onset LE injuries (0.43 vs 1.22, P < .01), acute-onset noncontact LE injuries (0.71 vs 1.61, P < .01), noncontact ankle sprains (0.25 vs 0.74, P = .01), and LE injuries treated surgically (0 vs 0.17, P = .04). Regression analysis showed significant incidence rate ratios for acute-onset noncontact LE injuries (0.33; 95% CI, 0.17-0.61), noncontact ankle sprains (0.38; 95% CI, 0.15-0.98), noncontact knee sprains (0.30; 95% CI, 0.10-0.86), and noncontact anterior cruciate ligament injuries (0.20; 95% CI, 0.04-0.95). CONCLUSION Coach-led neuromuscular warm-up reduces noncontact LE injuries in female high school soccer and basketball athletes from a mixed-ethnicity, predominantly low-income, urban population. TRIAL REGISTRATION CLINICALTRIALS.ORG IDENTIFIER: NCT01092286.


Pediatrics | 2008

Clinicians' description of factors influencing their reporting of suspected child abuse: Report of the child abuse reporting experience study research group

Rise Jones; Emalee G. Flaherty; Helen J. Binns; Lori Lyn Price; Eric J. Slora; Dianna Abney; Donna Harris; Katherine Kaufer Christoffel; Robert D. Sege

OBJECTIVES. Primary care clinicians participating in the Child Abuse Reporting Experience Study did not report all suspected physical child abuse to child protective services. This evaluation of study data seeks (1) to identify factors clinicians weighed when deciding whether to report injuries they suspected might have been caused by child abuse; (2) to describe clinicians’ management strategies for children with injuries from suspected child abuse that were not reported; and (3) to describe how clinicians explained not reporting high-suspicion injuries. METHODS. From the 434 pediatric primary care clinicians who participated in the Child Abuse Reporting Experience Study and who indicated they had provided care for a child with an injury they perceived as suspicious, a subsample of 75 of 81 clinicians completed a telephone interview. Interviewees included 36 clinicians who suspected child abuse but did not report the injury to child protective services (12 with high suspicion and 24 with some suspicion) and 39 who reported the suspicious injury. Interviews were analyzed for major themes and subthemes, including decision-making regarding reporting of suspected physical child abuse to child protective services and alternative management strategies. RESULTS. Four major themes emerged regarding the clinicians’ reporting decisions, that is, familiarity with the family, reference to elements of the case history, use of available resources, and perception of expected outcomes of reporting to child protective services. When they did not report, clinicians planned alternative management strategies, including active or informal case follow-up management. When interviewed, some clinicians modified their original opinion that an injury was likely or very likely caused by abuse, to explain why they did not report to child protective services. CONCLUSIONS. Decisions about reporting to child protective services are guided by injury circumstances and history, knowledge of and experiences with the family, consultation with others, and previous experiences with child protective services.


Journal of Urban Health-bulletin of The New York Academy of Medicine | 2004

Risk factors for overweight in five- to six-year-old Hispanic-American children: a pilot study.

Adolfo J. Ariza; Edwin H. Chen; Helen J. Binns; Katherine Kaufer Christoffel

The objective of this study was to determine the prevalence of and possible risk factors for overweight in a sample of 5- to 6-year-old Hispanic (predominantly Mexican American) children in Chicago, Illinois, to see if overweight is more common in more highly acculturated immigrant families. There were 250 kindergarten students (92% of those eligible) attending two public elementary schools serving primarily Mexican American neighborhoods measured for height and weight. Consenting mothers were interviewed (n=80) and measured (n=38). The interview tool covered demography, acculturation, infant and toddler feeding practices, current cating patterns and food preparation habits, physical activity, and psychosocial family characteristics. Overweight was conservatively defined as weight-for-height at or above the National Center for Health Statistics 95th percentile. The data were used to describe the prevalence of overweight. Overweight and nonoverweight children were compared on all survey variables using appropriate statistical tests, with significance set at .05. There were 23% of the total sample of children (n=250) and 26% of the subsample of children (those whose mothers were interviewed) who were overweight. Analysis limited to children in the subsample explored risk factors. The median score on the Acculturation Scale was 4.0 (range 2.4–10.4) on a scale of 2.4 (entirely not acculturated) to 12 (fully acculturated). There was no significant association between overweight and Acculturation Scale score. Overweight children were more likely than those not overweight to watch television for more than 3 hours during weekend days (48% vs. 22%, P=.03). Overweight children were also more likely to consume sweetened beverages (powdered drinks, soda pop, atole) daily (67% vs. 39%, P=.03). There was a trend indicating that free access to food at home increased the risk of overweight (P=0.06). No other family- or child-level variables were related to overweight. Only 40% of mothers with an overweight child correctly assessed these children as overweight. Approximately one quarter of the children in the study were overweight. Our hypothesis that their obesity was linked to acculturation was not confirmed. Longer hours of child television viewing on weekends and higher levels of sweetened beverage consumption were important behaviors associated with the occurrence of overweight. These data should be considered when designing future studies in this population.


Journal of Developmental and Behavioral Pediatrics | 1996

Infant and toddler feeding patterns and problems : Normative data and a new direction

Nancy R. Reau; Yvonne D. Senturia; Susan A. LeBailly; Katherine Kaufer Christoffel

To fill information gaps, predominantly non-Hispanic white parents in five Chicago-area pediatric offices were surveyed concerning infant (n = 130) and toddler (n = 151) feeding times and behaviors. Feeding time distributions did not differ by age. Percentiles (in minutes) were: 10th, 9.4; 50th, 17.7; and 90th, 29.3. The most common infant problematic feeding behavior (PFB) was “not always hungry at mealtime” (33%). Toddler PFB included “not always hungry at mealtime” (52%), “trying to end meals after a few bites” (42%), “picky eating” (35%), and strong food preferences (33%). Toddler picky eaters ate more slowly (means 23.3 vs 19.7 minutes, p<.04). Toddlers with recalled PFB at 6 and 12 months ate most slowly (mean 37.5 minutes). We conclude that: (1) infants and toddlers who take <30 minutes to feed are slow feeders; (2) reports of behavioral feeding problems are common in toddlers and are related to slow feeding; (3) and these data can guide clinical care and future studies. J Dev Behav Pediatr 17:149–153, 1996. Index terms: behavior, feeding, nutrition.


The Journal of Pediatrics | 1975

Fetal alcohol syndrome in dizygotic twins

Katherine Kaufer Christoffel; Ira S. Salafsky

A pair of fraternal twins with stigmata of the fetal alcohol syndrome are described. Apparently differences in susceptibility to the dysmorphogenic influence of ethanol caused one twin to be more severely affected than the other one. Both infants are growing poorly postnatally, and both are at risk for retarded development. Any evidence of the fetal alcohol syndrome, however, subtle, should be considered a warning of possible future developmental delay.


Journal of the American Academy of Child and Adolescent Psychiatry | 1998

Mental Health Service Use Among Young Children Receiving Pediatric Primary Care

John V. Lavigne; Richard Arend; Diane Rosenbaum; Katherine Kaufer Christoffel; B. S Andrew Burns; B. S Andrew Smith

OBJECTIVE To investigate the factors associated with mental health service use among young children. METHOD Five hundred ten preschool children aged 2 through 5 years were enrolled through 68 primary care physicians, with 388 (76% of the original sample) participating in a second wave of data collection, 12 to 40 months later. Consensus DSM-III-R diagnoses were assigned using best-estimate procedures. The test battery included the Child Behavior Checklist, a developmental evaluation, the Rochester Adaptive Behavior Inventory, and a videotaped play session (preschool children) or structured interviews (older children). At wave 2, mothers completed a survey of mental health services their child had received. RESULTS In logistic regression models, older children, children with a wave 1 DSM-III-R diagnosis, children with more total behavior problems and family conflict, and children receiving a pediatric referral were more likely to receive mental health services. Among children with a DSM-III-R diagnosis, more mental health services were received by children who were older, white, more impaired, experiencing more family conflict, and referred by a pediatrician. CONCLUSIONS Young children with more impairment and family conflict are more likely to enter into treatment. Services among young children of different races with diagnoses are not equally distributed. Pediatric referral is an important predictor of service use.


Journal of the American Academy of Child and Adolescent Psychiatry | 1998

Psychiatric disorders with onset in the preschool years: II. Correlates and predictors of stable case status.

John V. Lavigne; Richard Arend; Diane Rosenbaum; Helen J. Binns; Katherine Kaufer Christoffel; Robert D. Gibbons

OBJECTIVE To examine the correlates and predictors of stability and change in psychiatric disorder occurring among preschool children in a nonpsychiatric, primary care pediatric sample. METHOD Five hundred ten children aged 2 through 5 years were enrolled; 344 participated in a third wave of data collection 42 through 48 months later. Consensus diagnoses were assigned using best-estimate procedures; variables of maternal psychopathology, family climate, and life stresses were the correlates/predictors studied. RESULTS For children who were cases initially, family cohesion predicted diagnostic stability. Among initial noncases, those remaining noncases experienced increased family cohesion; for those who later became cases, family cohesion declined. Negative life events declined when children were consistently noncases. Children who were initially noncases but were cases at the two subsequent waves had the highest levels of maternal negative affect. Predictors at wave 1 for wave 2 cases status included lower socioeconomic status, less family cohesiveness, and greater family inhibition/control. Wave 2 correlates of wave 2 status included older children and negative life events. Wave 2 predictors of wave 3 status included being older, while wave 3 correlates of wave 3 case status included older children and higher maternal negative affect. CONCLUSIONS Family context contributes to the maintenance and onset of problems beginning in the preschool years.


Child Maltreatment | 2006

PEDIATRICIAN CHARACTERISTICS ASSOCIATED WITH CHILD ABUSE IDENTIFICATION AND REPORTING: RESULTS FROM A NATIONAL SURVEY OF PEDIATRICIANS

Emalee G. Flaherty; Robert D. Sege; Lori Lyn Price; Katherine Kaufer Christoffel; David P. Norton; Karen G. O'Connor

Pediatrician experience with child protective services (CPS) and factors associated with identifying and reporting suspected child physical abuse were examined by a survey of members of the American Academy of Pediatrics (AAP). Respondents provided information about their demographics and experience, attitudes and practices with child abuse. They indicated their diagnosis and management of a child in a purposely ambiguous clinical vignette. Pediatricians who had received recent child abuse education were more confident in their ability to identify and manage child abuse. High confidence in ability to manage child abuse and positive attitude about domestic violence screening and value of anticipatory guidance predicted that pediatricians would have high suspicion that the child in the vignette was abused and that they would report the child to CPS. Future efforts to improve medical intervention in child abuse should focus on physician attitudes and experience, as well as cognitive factors.


The Journal of Pediatrics | 1984

Treatment of infantile colic with dicyclominehydrochloride

Marc Weissbluth; Katherine Kaufer Christoffel; A Todd Davis

We performed a prospective, randomized, double-blind, placebo-controlled clinical trial of dicyclomine hydrochloride using specific diagnostic criteria for infantile colic: spells of unexplained irritability, agitation, fussiness or crying lasting greater than or equal to 3 hours/day, occurring greater than or equal to 3 days/week, and continuing for greater than or equal to 3 weeks. Dicyclomine eliminated colic in 15 of 24 (63%) infants, whereas placebo was effective in six of 24 (25%) (corrected X2 = 5.42, P = 0.02). The study also addressed the hypothesis that parental distress caused by infantile colic affects subsequent temperament and sleep patterns. The data fail to document easier temperaments or longer sleep durations at 4 months in infants whose colic ceased during treatment.

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Helen J. Binns

Children's Memorial Hospital

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Diane Rosenbaum

Children's Memorial Hospital

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Mark Donovan

Northwestern University

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Xiaobin Wang

Johns Hopkins University

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Richard Arend

Children's Memorial Hospital

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