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Biomedical subjects

P Zybert

Publications and source records attributed to P Zybert.

At least 19 recordsLinked to original sources
PubMed2001

Knowledge, beliefs, and barriers relevant to colorectal cancer screening in an urban population: a pilot study.

A sample of 115 urban, working-class, predominantly minority men and women was interviewed by telephone to assess knowledge, beliefs, and barriers relevant to colorectal cancer (CRC) and CRC screening. More than half (53.9%) were unable to name a CRC screening test. Misconceptions were common. Dispelling inaccurate beliefs, establishing an individual's preference for fecal occult blood tests or flexible sigmoidoscopy, and helping individuals take a proactive role in the receipt of CRC screening are important goals for health education efforts aimed at increasing rates of CRC screening. Participants' willingness to engage in detailed telephone conversations about CRC and CRC screening was encouraging.

Aged↗
PubMed2001

Calcium intake in preschool children--a study of dietary patterns in a low socioeconomic community.

BACKGROUND: There is a lack of published data on sources and quantity of calcium intake in preschool children. STUDY OBJECTIVES: To assess calcium intake compared with the Dietary Reference Intake (DRI), to identify major food sources of calcium, and to compare dietary patterns of healthy preschool children who do and do not meet the calcium DRI. DESIGN: Cross-sectional study. SETTING: Primary care pediatrics practice at a large urban medical center. SUBJECTS: A group of 228 children aged 44 to 60 months in a low socioeconomic community. METHODS: Diet was assessed using three or four 24-hour recalls administered approximately three months apart to the parents. Nutrient values were computed using a dietary analysis program based on USDA values. RESULTS: Mean daily calcium intake was 852 mg/day (S.D., 271) and 44% reported mean calcium intake less than the DRI of 800 mg/day. Milk consumption accounted for 64.3% and cheese for 6.7% of the daily calcium intake. Multiple linear regression analysis adjusting for age, sex, race, body mass index, and total caloric intake confirmed the main contribution of mainly milk and, to a much lesser extent, cheese consumption, as determinants of calcium intake. All of the children who consumed less than 1.2 servings of milk (288 ml) milk per day reported mean daily calcium intake below the DRI. CONCLUSIONS: Calcium intake below the DRI may be common in preschool children in low socioeconomic communities, and is associated primarily with lower milk intake. These findings indicate the need to promote the consumption of low-fat milk in preschool children.

Bone Density↗
PubMed1999

The effect of health education on the rate of ophthalmic examinations among African Americans with diabetes mellitus.

OBJECTIVES: This study evaluated a multicomponent educational intervention to increase ophthalmic examination rates among African Americans with diabetes. METHODS: A randomized trial was conducted with 280 African Americans with diabetes, enrolled from outpatient departments of 5 medical centers in the New York City metropolitan area, who had not had a dilated retinal examination within 14 months of randomization (65.7% female, mean age = 54.7 years [SD = 12.8 years]). RESULTS: After site differences were controlled, the odds ratio for receiving a retinal examination associated with the intervention was 4.3 (95% confidence interval = 2.4, 7.8). The examination rate pooled across sites was 54.7% in the intervention group and 27.3% in the control group. CONCLUSIONS: The intervention was associated with a rate of ophthalmic examination double the rate achieved with routine medical care.

Adult↗
PubMed1998

Promoting the selection of low-fat milk in elementary school cafeterias in an inner-city Latino community: evaluation of an intervention.

OBJECTIVES: This study examined the effects of a school-based intervention designed to promote the consumption of low-fat white milk at lunchtime in 6 elementary schools in an inner-city, primarily Latino neighborhood. METHODS: A multifaceted intervention based on social marketing techniques was delivered at 3 randomly selected schools. The school was the unit of assignment and analysis; 6902 children were involved in the study. Milk selection and consumption were measured by sampling discarded milk and/or tallying milk carton disappearance at baseline, immediately postintervention, and at 3 to 4 months follow-up. RESULTS: Immediately postintervention, the mean proportion of sampled milk cartons that contained low-fat milk increased in the intervention schools, from 25% to 57%, but remained constant at 28% in the control schools. Differences between intervention and control schools remained significant at 3 to 4 months follow-up. The intervention was not associated with a decrease in overall milk consumption. CONCLUSIONS: A school-based intervention can lead to significant increases in student consumption of low-fat milk.

Animals↗
PubMed1995

Assessment of documented foot examinations for patients with diabetes in inner-city primary care clinics.

BACKGROUND: The established guidelines for a diabetes foot examination include assessing circulatory, skin, and neurological status to detect problems early and reduce the likelihood of amputation. OBJECTIVE: To determine documented adherence with guidelines for foot examinations. SETTING: Four clinics in underserved areas. METHODS: Charts of 350 diabetic patients, identified by billing code, were reviewed for foot examination documentation. A documented foot examination was defined as assessing at least two of the three components of a foot examination. The review determined the periodicity and prevalence of foot examinations, referrals to a podiatrist or vascular surgeon during a 2-year period, and risk factors for foot complications. Stepwise logistic regression was used to determine whether risk factors for foot complications predicted foot examination status. RESULTS: The patients had a mean age and duration of diabetes of 57.7 and 8.8 years, respectively; 86% were black or Hispanic. There was no indication of foot examination or referral for 55.7% of the patients during the 2-year period. Patients with foot care referrals were more likely to have foot examinations by their primary care providers (P = .0001). There was almost a fourfold increase in the odds that patients with diagnosed peripheral vascular disease had foot examinations, with twofold greater odds for each 25-year increase in age. CONCLUSIONS: Populations at risk of diabetic complications are unlikely to have foot examinations in their primary medical care, but having peripheral vascular disease increases the likelihood. Efforts are needed to improve adherence to foot examination guidelines for patients with diabetes from underserved populations.

Ambulatory Care Facilities↗
PubMed1995

The availability of low-fat milk in an inner-city Latino community: implications for nutrition education.

Substitution of low-fat for whole milk is an important strategy for reducing saturated fat consumption, but intake of whole milk remains high among Latinos. To assess whether this is related to the unavailability of low-fat milk, we surveyed 251 grocery stores (bodegas) and 25 supermarkets in a predominantly low-income, urban Latino community. Low-fat milk was available in 73% of bodegas and 96% of supermarkets, but it constituted only 15% of total milk volume in bodegas and 37% of that volume in supermarkets. Since lack of availability was not a major obstacle to increasing low-fat milk consumption, public health nutrition campaigns should focus on increasing consumer demand.

Animals↗
PubMed1994

5-A-DAY: dietary behavior and the fruit and vegetable intake of Latino children.

OBJECTIVES: The purpose of the study was to examine children's intake of fruits and vegetables in relation to the recent national "5-A-DAY" campaign. METHODS: Four 24-hour dietary recalls per child collected from 205 mothers of 4- to 5-year-old urban Latino children were used to analyze average 5-A-DAY fruit and vegetable consumption and examine associations between 5-A-DAY consumption, nutrient intakes, and eating patterns. RESULTS: The reported mean servings per day of fruits and vegetables, as defined by 5-A-DAY criteria, were 1.8 and 1.0, respectively, with only 6.8% (n = 14) of the children averaging five or more servings per day. Fruit juice accounted for 36% of 5-A-DAY servings. There were significant linear trends in intake of vitamins A and C, potassium, iron, cholesterol, protein, and fiber across quintiles of 5-A-DAY intake. There were no differences among quintiles in intake of saturated or total fat or in servings from most non-5-A-DAY food groups. CONCLUSIONS: Latino children's intake of fruits and vegetables falls far short of current recommendations. Fruit juice accounted for a disproportionate amount of 5-A-DAY intake in this population. Sensible 5-A-DAY interventions should take into consideration the existing eating patterns of the target population.

Child, Preschool↗
PubMed1994

The reproducibility of data from a Food Frequency Questionnaire among low-income Latina mothers and their children.

We examined the 3-month and 1-year reproducibility of mothers' and children's dietary intakes of calories and 11 nutrients derived from oral administrations of a food frequency questionnaire to 166 Latina women. One-year correlations generally ranged from 0.40 to 0.55 for both mothers and children. For most nutrients, roughly half the children in the highest (lowest) quartile of intake at baseline were also in the highest (lowest) quartile 1 year later. The food frequency questionnaire has great potential for measuring typical nutrient intakes in these populations.

Child↗
PubMed1994

The rate of increase in blood pressure in children 5 years of age is related to changes in aerobic fitness and body mass index.

OBJECTIVE: To determine whether changes in aerobic fitness and body mass index are related to the age-related rise in blood pressure in healthy preschool children. STUDY DESIGN: Longitudinal analyses of 196 free-living children aged 5 years at baseline who were followed over a mean of 19.7 months. Aerobic fitness was assessed using a treadmill. All measures were obtained on multiple occasions at scheduled visits as part of a longitudinal cohort study. SETTING: An inner-city medical center. OUTCOME MEASURES: Blood pressure was measured using an automated Dinamap device. RESULTS: Mean systolic blood pressure was 95.3 mmHg (SD 8.38) at baseline and increased by 4.46 mmHg per year. Mean diastolic blood pressure was 53.9 mmHg (SD 5.81) at baseline and did not change significantly. Children in the highest quintile of increase in fitness had a significantly smaller increase in systolic blood pressure compared to children in the lowest quintile (2.92 vs 5.10 mmHg/year; P = .03). Children in the lowest quintile of increase in body mass index did not differ significantly in rate of increase in systolic blood pressure compared to children in the highest quintile (3.92 vs 4.96 mmHg/year). In a multiple regression model including baseline systolic blood pressure, fitness, height, body mass index, and other covariates, greater increase in fitness (P = .03) and lesser increase in body mass index (P < .01) were associated with lower rates of increase in systolic blood pressure. In a similar multivariate analysis, an increase in fitness was also associated with a lower rate of increase in diastolic blood pressure (P = .02). CONCLUSION: Young children who increase their aerobic fitness or decrease their body mass index reduce the rate of the age-related increase in blood pressure. These observations may have implications for development of interventions directed at the primary prevention of hypertension.

Age Factors↗
PubMed1994

Assessing changes in nutrient intakes of preschool children: comparison of 24-hour dietary recall and food frequency methods.

Methods for assessing change in the habitual diet of children are essential for diet intervention studies as well as clinical management. Food frequency questionnaires are a potential alternative to recall and record methods, which require multiple days of data collection for stable individual estimates of habitual intake. Over 3 years, we studied 173 children (93% Hispanic; baseline age 44-60 months) in New York City. We obtained dietary data by interviewing the child's mother. We calculated intakes of nine nutrients, expressed as nutrient densities, as the mean of two administrations of the Willett food frequency questionnaire and the mean of three administrations of the 24-hour dietary recall in years 1 and 3. The two methods consistently estimated the direction of change in mean nutrient density of total and polyunsaturated fat, cholesterol, carbohydrate, and potassium. Changes in nutrient density assessed by the two methods correlated poorly (r < or = 0.15) for all nine nutrients. Cross-classification analysis also showed no relation between change assessed by recall and food frequency methods. Lack of between-person variability could not explain the low correlations, as individual changes in nutrient density were large.

Child Nutritional Physiological Phenomena↗
PubMed1993

Relationship of mothers' food choice criteria to food intake of preschool children: identification of family subgroups.

This study investigated the relationship between potential criteria mothers use to select foods for their children, their food knowledge, and food consumption of their children. Participants were 218 predominantly Latino mothers and their 4 to 5-year-old children. Mothers rated 17 foods in terms of 10 food attributes (how tasty specific foods were to their child, whether they were convenient to prepare, etc.). Within-person correlation coefficients were then calculated between these ratings and reported frequency of consumption of these same 17 foods. These correlations were then used in a k-means cluster analysis to identify six distinct subgroups of families, who had different orientations ranging from "high health" to "high taste." Children in the "high health" groups had diets significantly lower in calories, fat, saturated fat, and sucrose and higher in fiber and vitamin A from 24-hour dietary recalls reported by mothers. Mothers' health knowledge was also correlated with nutrient takes of children. These data indicate that families can be segmented according to the importance of beliefs about healthfulness of foods and that this segmentation predicts quality of diet of children. This study suggests that interventions should be designed to increase mothers beliefs in the importance of health in choosing foods. For those mothers whose food choices are dominated by children's tastes, interventions should be directed at how to prepare healthful foods to taste good to children.

Adult↗
PubMed1993

Is there a relationship between dietary fat and stature or growth in children three to five years of age?

STUDY OBJECTIVE: To determine whether a moderately reduced fat diet affects the stature or growth of healthy preschool children. DESIGN: Cohort study with mean of 25 months of follow-up. SETTING: Primary care pediatrics practice at a large urban medical center. SUBJECTS: A predominantly Hispanic group of 215 children aged 3 to 4 years at baseline. MEASUREMENTS AND MAIN RESULTS: The children's diet was assessed using four 24-hour recalls and three Willett semiquantitative food-frequency questionnaires administered to the children's mothers over a 1-year baseline period. Stature was defined in terms of height, weight, and body mass index at baseline. Growth was defined in terms of change during follow-up in height, weight, and body mass index. Total fat provided a mean of 27.1% of caloric intake in the lowest quintile of intake compared with 38.4% in the highest quintile. There were no differences in stature or growth across quintiles of children defined by consumption of total fat, saturated fat, or cholesterol. These findings were consistent across the two methods of diet assessment. Children who consumed a smaller percentage of total calories from fat consumed significantly less total calories, saturated fat, cholesterol, calcium, and phosphorus, as well as more carbohydrates, iron, thiamine, niacin, vitamin A, and vitamin C. CONCLUSIONS: These data support the safety of a moderately reduced fat diet in healthy preschool children. Maintenance of calcium and phosphorus intake should be part of any program of dietary fat reduction. Substitution of low-fat milk for whole milk, rather than elimination of whole milk, is one such strategy.

Body Height↗
PubMed1992

Blood pressure reactivity does not correlate with baseline blood pressure or blood pressure change over time in preschool children.

Few studies have examined the relation of blood pressure reactivity to subsequent change in blood pressure of preschool children. The authors investigated relations between measurement-induced reactivity, exercise reactivity, and change in blood pressure over 16 months among 140 preschool children (46-67 months of age at baseline, 50.7% female, 92.9% Hispanic). Within-session measurement-induced reactivity was defined as the change in blood pressure between the first and the mean of the fourth and fifth readings obtained at each of 11 sessions. Between-session measurement-induced reactivity was defined as the change between mean blood pressure at session 1 and the mean of sessions 2 and 3. Both indices of measurement reactivity displayed poor reproducibility. Exercise reactivity was measured using a treadmill on two occasions and was moderately reproducible. There was no association between measurement and exercise reactivity. The change in systolic blood pressure over time was not associated with any measure of reactivity. The mean diastolic blood pressure did not change over the study period. Neither blood pressure reactivity to measurement nor blood pressure reactivity to exercise appeared to be a useful predictor of change in blood pressure in preschool children during a 16-month period.

Blood Pressure↗
PubMed1992

Consistency of the Willett semiquantitative food frequency questionnaire and 24-hour dietary recalls in estimating nutrient intakes of preschool children.

A study was performed to determine the utility of the Willett semiquantitative food frequency questionnaire for assessing the habitual diets of preschool children. Children (n = 224) were recruited mainly through a New York City hospital-based pediatric practice during 1986-1987. The children's ages at baseline were 44-60 months; 50% were male, and 91% were Hispanic. Over a 12-month period, the Willett food frequency questionnaire was administered twice to each child's parent, and a 24-hour dietary recall was conducted four times. For energy and eight nutrients, group mean intakes derived from food frequency questionnaires were 1.4-1.9 times higher than those from 24-hour recalls. Group mean estimates of nutrient density of total and saturated fat, potassium, and calcium did not differ between the two methods. Correlations between methods for crude nutrient intakes (unadjusted for energy consumption) ranged from 0.16 (polyunsaturated fat in boys) to 0.60 (potassium in girls). Correlations generally decreased when intakes were adjusted for energy consumption. Adjustment for energy intake and residual intraindividual variability yielded correlations of 0.48 for total calories, 0.35 for total fat, and 0.37 for saturated fat. For intake of energy and nine nutrients, of those children classified into the highest quintile by dietary recall, 28.9-40.9% were so classified by the Willett questionnaire, and 48.9-68.9% were classified into the highest two quintiles. When data were expressed as nutrient densities, agreement was high for potassium and calcium and fair for saturated fat, cholesterol, and protein. The moderately low consistency of nutrient intake estimates across dietary assessment methods in this study may be due, in large part, to residual intraindividual variability in both the recall data and the food frequency data.

Child, Preschool↗
PubMed1992

Food sources, dietary behavior, and the saturated fat intake of Latino children.

BACKGROUND: Recent recommendations for Americans aged 2 and older call for a reduction in the average saturated fat intake to less than 10% of calories. METHODS: Using 24-hour dietary recalls collected from mothers of 4- to 7-year-old urban Latino children, we identified foods and dietary behavior patterns that distinguish children with higher and lower mean daily percentages of calories from saturated fat. RESULTS: Compared with children in the lowest quintile of intake, children in the highest quintile consumed more than twice as much saturated fat per day from high-fat milk products (18.5 g vs 7.8 g), mostly from whole milk. They did not consume different kinds of milk or different amounts of milk per eating occasion, but on average they consumed milk more frequently (2.8 vs 1.6 eating occasions per day). Even children in the lowest quintile, on average, exceeded the 10% of calories from saturated fat currently recommended. If low-fat (1% fat) milk had been substituted without other dietary changes, all but the highest two quintiles would have been within the recommended level. CONCLUSIONS: The substitution of low-fat for whole milk appears to be a key strategy for preschool children for achieving recommended levels of saturated fat intake.

Animals↗
PubMed1992

Variability and self-regulation of energy intake in young children in their everyday environment.

Recent data from small numbers of children studied under controlled protocols indicate that intraindividual variation in energy consumption over 24 hours is smaller than variation from eating occasion to eating occasion, implying that children self-regulate their energy consumption. This hypothesis was tested in children living in their everyday environment. Between 1986 and 1989, 24-hour recalls were administered on seven occasions (four times in 1986 through 1987 and three times in 1988 through 1989) to the mothers of 181 preschool children in New York City. Each 24-hour period was divided into six meals or snacks. The coefficient of variation (standard deviation divided by the mean) was calculated for each child for energy consumption at each eating occasion and for the day as a whole. Coefficients of variation for energy consumption at the six eating occasions ranged from 46.5% to 165.8%, compared with 30.3% for the whole day. This coefficient of variation for the observed whole-day energy consumption was significantly less (P < .001) than would be expected if no autoregulation of energy intake (no meal-to-meal correlation) occurred. These findings in children living in their everyday environment are consistent with observations under more controlled study conditions. These data suggest that children who eat less at one meal compensate at another, although the data do not address the issues of longer term energy self-regulation, overall energy balance, or diet quality.

Child Nutritional Physiological Phenomena↗