May A Beydoun1, Marie T Fanelli-Kuczmarski2, Danielle Shaked3, Greg A Dore4, Hind A Beydoun5, Ola S Rostant4, Michele K Evans4, Alan B Zonderman4. 1. Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIH, Intramural Research Program, Baltimore, MD; baydounm@mail.nih.gov. 2. Department of Health, Nutrition and Exercise Sciences, University of Delaware, Newark, DE; 3. Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIH, Intramural Research Program, Baltimore, MD; Department of Psychology, University of Maryland, Baltimore County, Catonsville, MD; and. 4. Laboratory of Epidemiology and Population Sciences, National Institute on Aging, NIH, Intramural Research Program, Baltimore, MD; 5. Graduate Program in Public Health, Eastern Virginia Medical School, Norfolk, VA.
Abstract
BACKGROUND: Temporality between socioeconomic status (SES), depressive symptoms (DS), dietary quality (DQ), and central adiposity (CA) is underexplored. OBJECTIVES: Alternative pathways linking SES to DQ, DS, and CA were tested and models compared, stratified by race and sex. METHODS: With the use of data from the Healthy Aging in Neighborhoods of Diversity across the Life Span (baseline age: 30-64 y; 2 visits; mean follow-up: 4.9 y), 12 structural equation models (SM) were conducted and compared. Time-dependent factors included the Center for Epidemiologic Studies-Depression [CES-D total score, baseline or visit 1 (v1), follow-up or visit 2 (v2), mean across visits (m), and annual rate of change (Δ)], 2010 Healthy Eating Index (HEI) (same notation), and central adiposity principal components' analysis score of waist circumference and trunk fat (kg) (Adipcent) (same notation). Sample sizes were white women (WW, n = 236), white men (WM, n = 159), African American women (AAW, n = 395), and African American men (AAM, n = 274), and a multigroup analysis within the SM framework was also conducted. RESULTS: In the best-fitting model, overall, ∼31% of the total effect of SES→Adipcent(v2) (α ± SE: -0.10 ± 0.03, P < 0.05) was mediated through a combination of CES-D(v1) and ΔHEI. Two dominant pathways contributed to the indirect effect: SES→(-)CES-D(v1)→(+)Adipcent(v2) (-0.015) and SES→(+) ΔHEI→(-)Adipcent(v2) (-0.017), with a total indirect effect of -0.031 (P < 0.05). In a second best-fitting model, SES independently predicted Adipcent(v1, -0.069), ΔHEI(+0.037) and CES-D(v2, -2.70) (P < 0.05), with Adipcent(v1) marginally predicting ΔHEI(-0.014) and CES-D(v2, +0.67) (P < 0.10). These findings were indicative of DS's and CA's marginally significant bidirectional association (P < 0.10). Although best-fit-selected models were consistent across race × sex categories, path coefficients differed significantly between groups. Specifically, SES→Adipcent[v1(+0.11), v2(+0.14)] was positive among AAM (P < 0.05), and the overall positive association of Adipcent(v1)→CES-D(v2) was specific to AAW (+0.97, P < 0.10). CONCLUSIONS: Despite consistent model fit, pathways linking SES to DQ, DS, and CA differed markedly among the race × sex groups. Our findings can inform the potential effectiveness of various mental health and dietary interventions.
BACKGROUND: Temporality between socioeconomic status (SES), depressive symptoms (DS), dietary quality (DQ), and central adiposity (CA) is underexplored. OBJECTIVES: Alternative pathways linking SES to DQ, DS, and CA were tested and models compared, stratified by race and sex. METHODS: With the use of data from the Healthy Aging in Neighborhoods of Diversity across the Life Span (baseline age: 30-64 y; 2 visits; mean follow-up: 4.9 y), 12 structural equation models (SM) were conducted and compared. Time-dependent factors included the Center for Epidemiologic Studies-Depression [CES-D total score, baseline or visit 1 (v1), follow-up or visit 2 (v2), mean across visits (m), and annual rate of change (Δ)], 2010 Healthy Eating Index (HEI) (same notation), and central adiposity principal components' analysis score of waist circumference and trunk fat (kg) (Adipcent) (same notation). Sample sizes were white women (WW, n = 236), white men (WM, n = 159), African American women (AAW, n = 395), and African American men (AAM, n = 274), and a multigroup analysis within the SM framework was also conducted. RESULTS: In the best-fitting model, overall, ∼31% of the total effect of SES→Adipcent(v2) (α ± SE: -0.10 ± 0.03, P < 0.05) was mediated through a combination of CES-D(v1) and ΔHEI. Two dominant pathways contributed to the indirect effect: SES→(-)CES-D(v1)→(+)Adipcent(v2) (-0.015) and SES→(+) ΔHEI→(-)Adipcent(v2) (-0.017), with a total indirect effect of -0.031 (P < 0.05). In a second best-fitting model, SES independently predicted Adipcent(v1, -0.069), ΔHEI(+0.037) and CES-D(v2, -2.70) (P < 0.05), with Adipcent(v1) marginally predicting ΔHEI(-0.014) and CES-D(v2, +0.67) (P < 0.10). These findings were indicative of DS's and CA's marginally significant bidirectional association (P < 0.10). Although best-fit-selected models were consistent across race × sex categories, path coefficients differed significantly between groups. Specifically, SES→Adipcent[v1(+0.11), v2(+0.14)] was positive among AAM (P < 0.05), and the overall positive association of Adipcent(v1)→CES-D(v2) was specific to AAW (+0.97, P < 0.10). CONCLUSIONS: Despite consistent model fit, pathways linking SES to DQ, DS, and CA differed markedly among the race × sex groups. Our findings can inform the potential effectiveness of various mental health and dietary interventions.
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