Methods To Reduce The Impact Of Intraclass Correlation In Group-Randomized Trials

Murray, David M.; Blitstein, Jonathan

doi:10.1177/0193841x02239019

Cited by 189 publications

(214 citation statements)

References 42 publications

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“…Conventional single-level analytical approach is inadequate to obtain valid statistical results when the ICC is large. Murray and Blitstein (2003) have reported that the school-level ICCs for the majority of health behaviors is less than 0.05 indicating low degree of dependence in observations. Therefore, ICCs were calculated for variables in the model and all were found to be less than 0.05.…”

Section: Discussionmentioning

confidence: 99%

BMI as a moderator of perceived stress and emotional eating in adolescents

et al. 2008

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Emotional eating has often been linked to overweight and/or obesity. Multiple group SEM analyses were conducted using cross-sectional data from 517 minority students in Los Angeles County. Results showed no differences in emotional eating between normal weight and overweight students. Perceived stress was indeed a significant correlate of emotional eating, independent of BMI status, as indicated by the lack of a modifying effect of BMI status. Findings highlight the fact that emotional eating is not an issue only for overweight and obese persons. This study shows that some children in this population at increased risk for obesity and related chronic disease have already incorporated emotional eating as a learned response to stress by the time that they enter adolescence.

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Section: Discussionmentioning

confidence: 99%

BMI as a moderator of perceived stress and emotional eating in adolescents

et al. 2008

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“…Although group randomized designs require larger scale interventions, recent innovations to address problems with intraclass correlations mitigate such problems to a certain degree. 77 Another quantitative approach that is especially well suited for AIAN communities is the multiple baseline design. This adaptation of a research design for singleparticipant and small-N studies involves gathering data across multiple study sites; the intervention is implemented at each site at time-lagged intervals.…”

Section: Culturally Specific Assessment and Intervention Methodsmentioning

confidence: 99%

Balancing Empiricism and Local Cultural Knowledge in the Design of Prevention Research

Fisher

Ball

2005

Journal of Urban Health: Bulletin of the New York Academy of Me

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“…To assess potential confounding, we examined group differences between sociodemographic variables and basic needs at baseline. Because we did not find any meaningful confounding, and per Murray and Blistein's 35 suggested method, we chose covariates (race, marital status, and maternal employment) that reduced the intraclass correlation effect for our regression models. Additionally, for all outcome measures collected after the index visit, we adjusted the models for duration of follow-up time.…”

Section: Sample Size and Statistical Analysismentioning

confidence: 99%

Addressing Social Determinants of Health at Well Child Care Visits: A Cluster RCT

et al. 2015

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OBJECTIVE: To evaluate the effect of a clinic-based screening and referral system (Well Child Care, Evaluation, Community Resources, Advocacy, Referral, Education [WE CARE]) on families' receipt of community-based resources for unmet basic needs. METHODS:We conducted a cluster randomized controlled trial at 8 urban community health centers, recruiting mothers of healthy infants. In the 4 WE CARE clinics, mothers completed a self-report screening instrument that assessed needs for child care, education, employment, food security, household heat, and housing. Providers made referrals for families; staff provided requisite applications and telephoned referred mothers within 1 month. Families at the 4 control community health centers received the usual care. We analyzed the results with generalized mixed-effect models.RESULTS: Three hundred thirty-six mothers were enrolled in the study (168 per arm). The majority of families had household incomes ,$20 000 (57%), and 68% had $2 unmet basic needs. More WE CARE mothers received $1 referral at the index visit (70% vs 8%; adjusted odds ratio [aOR] = 29.6; 95% confidence interval [CI], 14.7-59.6). At the 12-month visit, more WE CARE mothers had enrolled in a new community resource (39% vs 24%; aOR = 2.1; 95% CI, 1.2-3.7). WE CARE mothers had greater odds of being employed (aOR = 44.4; 95% CI, 9.8-201.4). WE CARE children had greater odds of being in child care (aOR = 6.3; 95% CI, 1.5-26.0). WE CARE families had greater odds of receiving fuel assistance (aOR = 11.9; 95% CI, 1.7-82.9) and lower odds of being in a homeless shelter (aOR = 0.2; 95% CI, 0.1-0.9).CONCLUSIONS: Systematically screening and referring for social determinants during well child care can lead to the receipt of more community resources for families. WHAT'S KNOWN ON THIS SUBJECT:Although pediatric professional guidelines emphasize addressing a child' s social environment in the context of well child care, it remains unclear whether screening for unmet basic needs at visits increases low-income families' receipt of community-based resources. WHAT THIS STUDY ADDS:This study demonstrates that systematically screening and referring for social determinants of health during primary care can lead to the receipt of more community resources for families.

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Methods To Reduce The Impact Of Intraclass Correlation In Group-Randomized Trials

Cited by 189 publications

References 42 publications

BMI as a moderator of perceived stress and emotional eating in adolescents

BMI as a moderator of perceived stress and emotional eating in adolescents

Balancing Empiricism and Local Cultural Knowledge in the Design of Prevention Research

Addressing Social Determinants of Health at Well Child Care Visits: A Cluster RCT

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