Uriyoán Colón-Ramos

Evaluation of Three Short Dietary Instruments to Assess Fruit and Vegetable Intake: The National Cancer Institute's Food Attitudes and Behaviors Survey

BACKGROUND Fruit and vegetable (F/V) intake assessment tools that are valid, reliable, brief, and easy to administer and code are vital to the field of public health nutrition. OBJECTIVE To evaluate three short F/V intake screeners (ie, a 2-item serving tool, a 2-item cup tool, and a 16-item F/V intake screener) among adults using multiple 24-hour dietary recalls (24-hour recalls) as the reference instrument and evaluate test-retest reliability of the screeners across a 2- to 3-week time period. DESIGN Validity and reliability study. PARTICIPANTS/SETTING Two hundred forty-four adults for the validity study and 335 adults for test-retest reliability. STATISTICAL ANALYSES PERFORMED Median values for F/V intakes were calculated for the screeners and 24-hour recalls. The Wilcoxon signed rank test was used to compare screeners with the 24-hour recalls. Deattenuated Pearson correlations were reported for validity and intraclass correlation coefficient used for reliability. RESULTS The estimated median daily servings/cups of F/V for the 2-item serving screener was lower, for the 2-item cup screener was equivalent for men but higher for women, and for the 16-item F/V intake screener were about the same when compared with 24-hour recall values. The deattenuated correlations comparing the 24-hour recalls with the screeners were positive but weak for the 2-item serving screener, and were positive and moderate in strength for the 2-item cup and 16-item F/V intake screeners. The test-retest intraclass correlation coefficients were all positive and fairly strong for all of the screeners. CONCLUSIONS Although dietary screeners offer a more cost-effective, less burdensome way to obtain gross estimates to rank individuals with regard to F/V intake, these methods are not recommended for assessing precise intake levels.

ResearchOriginal ResearchEvaluation of Three Short Dietary Instruments to Assess Fruit and Vegetable Intake: The National Cancer Institute's Food Attitudes and Behaviors Survey

BACKGROUND Fruit and vegetable (F/V) intake assessment tools that are valid, reliable, brief, and easy to administer and code are vital to the field of public health nutrition. OBJECTIVE To evaluate three short F/V intake screeners (ie, a 2-item serving tool, a 2-item cup tool, and a 16-item F/V intake screener) among adults using multiple 24-hour dietary recalls (24-hour recalls) as the reference instrument and evaluate test-retest reliability of the screeners across a 2- to 3-week time period. DESIGN Validity and reliability study. PARTICIPANTS/SETTING Two hundred forty-four adults for the validity study and 335 adults for test-retest reliability. STATISTICAL ANALYSES PERFORMED Median values for F/V intakes were calculated for the screeners and 24-hour recalls. The Wilcoxon signed rank test was used to compare screeners with the 24-hour recalls. Deattenuated Pearson correlations were reported for validity and intraclass correlation coefficient used for reliability. RESULTS The estimated median daily servings/cups of F/V for the 2-item serving screener was lower, for the 2-item cup screener was equivalent for men but higher for women, and for the 16-item F/V intake screener were about the same when compared with 24-hour recall values. The deattenuated correlations comparing the 24-hour recalls with the screeners were positive but weak for the 2-item serving screener, and were positive and moderate in strength for the 2-item cup and 16-item F/V intake screeners. The test-retest intraclass correlation coefficients were all positive and fairly strong for all of the screeners. CONCLUSIONS Although dietary screeners offer a more cost-effective, less burdensome way to obtain gross estimates to rank individuals with regard to F/V intake, these methods are not recommended for assessing precise intake levels.

Differences in Fruit and Vegetable Intake among Hispanic Subgroups in California: Results from the 2005 California Health Interview Survey

OBJECTIVE To compare total fruit and vegetable intake in cup equivalents and its individual components among Hispanic subgroups in California. METHODS Data are from the adult portion of the 2005 California Health Interview Survey. Hispanic/Latino subjects (n=7,954) were grouped into six subcategories (Mexican, Central American, Caribbean, Spanish American, South American, and >1 group). Total fruit and vegetable intake in cup equivalents was estimated from frequency responses about seven food categories. Both t test and chi(2) test were used to assess differences in sociodemographic characteristics across Hispanic subgroups. Multivariate linear regressions using SUDAAN software (Survey Data Analysis, version 9.0.1, 2005, Research Triangle Institute, Research Triangle Park, NC) were conducted to obtain means of total fruit and vegetable intake in cup equivalents and its components by Hispanic subgroups controlling for confounders. RESULTS Hispanic subgroups did not differ in their intake of total fruit and vegetable intake in cup equivalents (mean 3.4 c and 2.9 c for men and women, respectively). Small but significant differences (P<0.01) were found across Hispanic subgroups in individual fruit and vegetable components (green salad [women only], cooked dried beans and nonfried white potatoes) after adjusting for potential sociodemographic and acculturation confounders. CONCLUSIONS Fruit and vegetable intake by Hispanic respondents did not meet the national recommendation, although their reported intake is higher compared to other race/ethnicity groups. The public health message remains the same: Increase fruit and vegetable intake. Examination of intake for subgroups of Hispanics may enhance the utility of dietary information for surveillance, program and message design, and intervention and evaluation.

Poverty, Food Insecurity, and Obesity: A Conceptual Framework for Research, Practice, and Policy

Alarming trends in obesity and food insecurity in the United States have raised public health concerns and efforts to understand and address these potentially related public health problems. Although much research has been done to discern whether food insecurity is causally related to the obesity epidemic, the evidence to date is mixed. To address a pressing need for greater conceptual clarity regarding these urgent public health problems, our article summarizes findings from research examining the association between obesity and food insecurity in the United States and describes a conceptual framework to characterize the factors that may fuel a cycle of mutual influence among obesity, food insecurity, and their shared mechanisms and health-related outcomes.

Socio-economic status and health awareness are associated with choice of cooking oil in Costa Rica

OBJECTIVE To examine the socio-economic and lifestyle determinants of cooking oil choice in Costa Rica during the last decade (1994-2004). DESIGN Cross-sectional study. Subjects (total n = 2274) belonged to the control population of a large case-control study; they were recruited yearly. Data about type of oil used for cooking, dietary intake, socio-economic and demographic characteristics were collected. SETTING A dietitian visited all subjects and conducted the interviews at their homes; all subjects lived in the Costa Rican central valley region. SUBJECTS Adult, free-living, rural and urban Costa Ricans with no history of myocardial infarction and physical or mental disability. RESULTS The odds of choosing soybean over palm oil increased significantly each year (P < 0.05) and was determined by high socio-economic status (SES) and variables that suggest health awareness (self-reported history of hypertension, high cholesterol, multivitamin use and intake of green leafy vegetables). The odds of choosing other unsaturated oils, namely corn and sunflower, over soybean oil also increased yearly (P < 0.05) and was associated with the same two factors (high SES and health awareness). Palm oil users remained in the lowest SES tertile and were more likely to live in rural areas. Across all SES tertiles, high health awareness determined the odds of choosing other unsaturated oils over palm oil, and soybean oil (P < 0.05). CONCLUSION These data show that, in addition to SES, health awareness is associated with the selection of unsaturated oils over palm oil in a developing country undergoing transition. These data should be considered when targeting nutrition messages and policies that promote better dietary choices.

Practicing What They Preach : Health Behaviors of Those Who Provide Health Advice to Extensive Social Networks

As a way of identifying a conduit to disseminate health information, this study aims to explore health behaviors and attitudes of a unique group of extensively socially-networked individuals who regularly are asked for their health advice. Respondents from a population-based consumer opinion panel (n = 2,639) were categorized as “extensively socially-networked” (75+ friends and acquaintances, and almost daily giving friends advice on general issues) vs. “non-networked.” The networked respondents were further divided into “health-networked” (regularly asked for health advice) versus “only-socially-networked” groups (asked for general advice, not health). Chi-square analyses, ANOVA tests, and multivariate regressions controlling for sociodemographic variables compared health behaviors and attitudes between groups. Results indicated that health-networked individuals reported more positive health behaviors (e.g., fruit and vegetable consumption) and attitudes than only-socially-networked and non-networked individuals. Future research is warranted to elucidate how providing health advice to a large network contributes to the positive health of health-networked individuals. Exploratory analyses revealed that doctors and health/fitness magazines were main sources of health and nutrition information for health-networked respondents. Through their advice and word-of-mouth, health-networked individuals have the potential to influence the health information of large groups of people and, therefore, may serve as valuable change agents to disseminate health and nutrition information.

Barriers to and Suggestions for a Healthful, Active Lifestyle as Perceived by Rural and Urban Costa Rican Adolescents

OBJECTIVE To assess the perceptions of rural and urban Costa Rican adolescents regarding which barriers and motivators affect their adoption of an active lifestyle. DESIGN Data were collected in focus group discussions. PARTICIPANTS 108 male and female adolescents aged 12 to 18 from the 7th to 11th grades. SETTING Two urban and 1 rural high school in San José, Costa Rica. PHENOMENA OF INTEREST Active lifestyle; barriers and motivators for active life. ANALYSIS Data were reviewed for emerging themes, and themes were coded using content analysis procedures. RESULTS Major barriers: (a) physical education curriculum was focused on competitive sports; (b) lack of facilities in the school and community environments; (c) family did not provide good role models and reinforced the socially expected gender roles. Key motivators: (a) changed the physical education curriculum to focus on leisure and recreational activities; (b) increased the availability of facilities both in the school and in the community; and (c) provided a strong social support network. CONCLUSIONS AND IMPLICATIONS The school, community, and family environments are potential targets for physical activity interventions for adolescents. Future studies should explore in depth the influence of adolescent socialization patterns (particularly for females) in the establishment of an active lifestyle.

Impact of WHO recommendations to eliminate industrial trans-fatty acids from the food supply in Latin America and the Caribbean

BACKGROUND The World Health Organization (WHO) has deemed that there is enough evidence to recommend the elimination of industrially produced trans-fatty acids (TFA) from the food supply. This article evaluates government-led public health strategies in countries in Latin America and the Caribbean (LAC), and factors perceived to affect following WHOs recommendation to eliminate industrially produced TFA. METHODS Descriptive, prospective multiple case studies integrated data from open-ended questionnaires to representatives of ministries of health, and systematic review of internal and publicly available documents in 13 LAC countries. FINDINGS Overall, government efforts to follow WHO recommendations have not been well co-ordinated throughout the region. Evidence for this includes the lack of standardization of TFA definitions. For example, some countries exclude naturally occurring TFA from the definitions, whereas others leave the option open to their inclusion. As a consequence, the criteria for trans-free nutrient claims and labelling requirements are inconsistent across the region. Government-led strategies varied from banning or limiting TFA content in the food supply to voluntary labelling of TFA. The identified challenges to the implementation of policies to reduce TFA include the shortage of information on TFA content of diets and foods, consumer unawareness of TFA and lack of monitoring and surveillance. The identified enabling factors were intersectoral collaboration with industry, mandatory labelling regulation and international and national visibility of the topic, which facilitated reduction of TFA content. INTERPRETATION A co-ordinated effort is required to achieve virtual elimination of all TFA in the region, as recommended by WHO. Standardization of the definition of TFA across the region would facilitate regulation, consumer education efforts and monitoring and surveillance efforts. Simultaneously, countries need to determine their level of exposure to TFA through the implementation of small surveys to assess blood TFA levels using blood spots, and the evaluation of TFA in fat sources that are commonly used.

Association between Dietary Patterns during Pregnancy and Birth Size Measures in a Diverse Population in Southern US

Despite increased interest in promoting nutrition during pregnancy, the association between maternal dietary patterns and birth outcomes has been equivocal. We examined maternal dietary patterns during pregnancy as a determinant of offspring’s birth weight-for-length (WLZ), weight-for-age (WAZ), length-for-age (LAZ), and head circumference (HCZ) Z-scores in Southern United States (n = 1151). Maternal diet during pregnancy was assessed by seven dietary patterns. Multivariable linear regression models described the association of WLZ, WAZ, LAZ, and HCZ with diet patterns controlling for other maternal and child characteristics. In bivariate analyses, WAZ and HCZ were significantly lower for processed and processed-Southern compared to healthy dietary patterns, whereas LAZ was significantly higher for these patterns. In the multivariate models, mothers who consumed a healthy-processed dietary pattern had children with significantly higher HCZ compared to the ones who consumed a healthy dietary pattern (HCZ β: 0.36; p = 0.019). No other dietary pattern was significantly associated with any of the birth outcomes. Instead, the major outcome determinants were: African American race, pre-pregnancy BMI, and gestational weight gain. These findings justify further investigation about socio-environmental and genetic factors related to race and birth outcomes in this population.

The association between fruit and vegetable intake, knowledge of the recommendations, and health information seeking within adults in the U.S. mainland and in Puerto Rico.

Health information correlates of fruit and vegetable intake and of knowledge of the fruit and vegetable recommendations were examined using bivariate and multivariate regressions with data from the 2007–2008 U.S. National Cancer Institutes Health Information National Trends Survey in the United States and in Puerto Rico. Residents from Puerto Rico had the lowest reported fruit and vegetable intake and the lowest knowledge of the recommended servings of fruits and vegetables to maintain good health, compared with U.S. Hispanics, non-Hispanic Whites, and Blacks. Sixty-seven percent of Puerto Rican residents and 62% of U.S. Hispanics reported never seeking information on health or medical topics. In multivariate analysis, those who never sought information on health or medical topics reported significantly lower fruit and vegetable intake (coefficient = −0.24; 95% CI [−0.38, −0.09]), and were less likely to know the fruit and vegetable recommendations (OR = 0.32; 95% CI [0.20, 0.52]), compared with those who obtained information from their health care providers. Health promotion initiatives in the United States and Puerto Rico have invested in mass media campaigns to increase consumption of and knowledge about fruit and vegetables, but populations with the lowest intake are less likely to seek information. Strategies must be multipronged to address institutional, economic, and behavioral constraints of populations who do not seek out health information from any sources.