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J Burema

Publications and source records attributed to J Burema.

At least 37 records · Page 2Linked to original sources
PubMed1994

Family resemblance in energy, fat, and cholesterol intake: a study among three generations of women.

BACKGROUND: Transfer of nutrition habits within the family may contribute to the establishment of a high-fat diet. Several studies show a significant correlation in nutrient intake between parents and children living in the same household. This study describes family resemblances in nutrient intake among adult women living apart. METHODS: Family resemblance in fat intake was assessed in three generations of adult women by means of a short food-frequency questionnaire. Data were collected on 291 maternally related family members (97 young adult women, their mothers, and their grandmothers). RESULTS: Weak correlations (0.13-0.27) were found between nutrient intake of the younger and middle generation. Correlations between the middle and older generation (-0.03-0.29) and between the younger and older generation (-0.03-0.33) tended to be lower. CONCLUSIONS: This study shows that family resemblance in nutrient intake is weak for adult women living apart. There seems to be more impact of middle-aged mother's eating habits on the fat intake of their adult daughters than of elderly women's eating habits on their middle-aged daughters.

Adult↗
PubMed1993

Perimenopausal increase in serum cholesterol: a 10-year longitudinal study.

The relative contribution of menopause to the age-related increase in serum total cholesterol concentration in women is not exactly known. Cross-sectional studies suggest a considerable contribution of menopause, whereas in short-term longitudinal studies, only a small increase was observed around menopause. In a 10-year follow-up study (1979-1989), serum total cholesterol concentration and dietary intake were measured annually in 167 healthy perimenopausal women (initially aged 49-56 years) who lived in the mixed rural/industrial community of Ede, the Netherlands. The longitudinal design enabled us to study the "natural course" of serum total cholesterol concentration and the influence of dietary fat intake during and after cessation of ovulation. For data analysis, three menopausal cohorts were created based on years relative to menopause: 2 years before ("perimenopausal"), 2 years after ("early postmenopausal"), and 6 years after ("late postmenopausal"). In each cohort, the analysis was conducted on data from 4 years of follow-up. The results show that from 2 years before to 6 years after menopause, serum total cholesterol concentration increased on average by at least 1.1 mmol/liter (19%). Thereafter, only a minor increase was observed. The rise was significantly lower in women who increased their intake of polyunsaturated fatty acids as compared with women who reduced their intake during that period. It is concluded that cessation of ovulation appears to be associated with a major increase of 19% in serum total cholesterol concentration during an 8-year period around menopause. This increase may be reduced by increasing the intake of polyunsaturated fatty acids.

Cholesterol↗
PubMed1993

Relative and biomarker-based validity of a food-frequency questionnaire estimating intake of fats and cholesterol.

The relative validity of a 104-item food-frequency method to assess intakes of fats and cholesterol was tested against the dietary history of 191 men and women. Pearson correlation coefficients ranged from 0.38 for linoleic acid (% of energy) to 0.83 for energy intake, with 0.78 and 0.75 for the intakes of total fat and saturated fatty acids, respectively. Mean intakes were overestimated by the food-frequency questionnaire relative to the dietary history by 5% for energy and monounsaturated fatty acids (% of energy) and up to 30% for linoleic acid intake. Linoleic acid concentrations in erythrocytes and adipose tissue were used as biomarkers of intake. The correlation of the linoleic acid intake according to the food-frequency questionnaire with linoleic acid in erythrocytes and adipose tissue was 0.44 and 0.28, respectively, and the dietary history gave similar values. The food-frequency questionnaire gives results similar to those from the dietary history and is thus considered appropriate for classifying subjects according to their fat intake.

Adult↗
PubMed1992

Habitual dietary calcium intake and blood pressure change around the menopause: a longitudinal study.

In a 10-year follow-up study, blood pressure and dietary intake were measured annually in 167 healthy perimenopausal normotensive women. Their initial ages ranged between 49 and 56 years and habitual calcium intake between 560 and 2580 mg/day (mean 1110 mg/day); they lived in the mixed rural/industrial community of Ede, the Netherlands. The longitudinal design provided an opportunity to study the 'natural history' of blood pressure and the effect of dietary calcium during and after the period of ovarian failure. For data analysis, person-time experience was divided into three menopausal periods. Based on years relative to menopause three menopausal cohorts were created starting 2 years before, 2 years after and 6 years after menopause, each was followed for 4 years. Changes in systolic (SBP) and diastolic blood pressure (DBP) during the menopausal periods were adjusted for change in body mass index and other relevant variables in multiple regression analysis. An average decline in SBP of 6 mm Hg was observed in the period of 2 years before menopause to 6 years after menopause, and an increase of almost 5 mm Hg in the period between 6 and 10 years after menopause. A significant change in DBP was not observed. Neither changes in, nor the absolute level of, calcium intake showed any relevant association with blood pressure change. Ovarian failure seems to reverse temporarily the increase in blood pressure due to aging. The results do not suggest that a habitual calcium intake exceeding 800-1000 mg/day (the current Recommended Daily Allowance for adults) is effective in preventing hypertension during the peri- and postmenopausal period.

Blood Pressure↗
PubMed1992

Relations between occupation, smoking, lung function, and incidence and mortality of chronic non-specific lung disease: the Zutphen Study.

Information gathered in the "Zutphen study", the Dutch contribution to the Seven Countries Study was used for the present study. Follow up data from 1965 to 1 July 1985 were used. During this follow up, the morbidity state of the participants was verified at regular intervals. In 1965 lung function was measured by spirometry and the vital capacity (VC) and forced expiratory volume in one second (FEV1) were available. A complete set of data was available for 668 men. The occurrence of chronic non-specific lung disease (CNSLD) at a specific time was coded by one physician, using strict criteria. Information about the cause of death was obtained and coded by one physician in 1985. Occupation was coded and a distinction between blue and white collar workers was made. For the analysis of the relation between age, lung function, smoking habits, and occupational state with CNSLD incidence and mortality, proportional hazard models were used. Blue collar workers had a significantly raised risk for incidence of CNSLD only. The hazard ratio for blue v white collar workers with CNSLD mortality was 1.4 but not statistically significant. It was concluded that occupation is clearly related to incidence of CNSLD. There were indications that occupation is related to mortality from CNSLD. A reduced FEV1 was a strong predictor of both CNSLD incidence and mortality. It is noteworthy that small differences in age and height standardised lung function were significantly related to incidence of CNSLD, mortality from CNSLD, and total mortality. Although these differences in lung function have no direct clinical importance for the individual subject, they indicate a raised morbidity and mortality risk for the population.

Age Factors↗
PubMed1992

Nutrients and contaminants in human milk from mothers on macrobiotic and omnivorous diets.

The effect of alternative dietary habits and prolonged lactation on the nutrient and contaminant concentrations in human milk was studied. The study sample consisted of mothers on macrobiotic diets, containing little or no diary products and meat, at 2-3 months postpartum (n = 9) and 9-13 months postpartum (n = 12), and mothers on omnivorous diets at 2-3 months postpartum (n = 10). Protein and zinc concentrations in breast-milk from macrobiotic mothers decreased with stage of lactation. After adjustment for stage of lactation, milk from macrobiotic mothers contained less calcium, magnesium and saturated fatty acids C15:0-C20:0, and more polyunsaturated fatty acids. Observed tendencies for lower protein and fat and higher lactose concentrations in the macrobiotic group were not statistically significant. Concentrations of vitamin B12, HCB and polychlorinated biphenyls (PCB 118, PCB 138, PCB 153 and PCB 180) were lower in the macrobiotic group. After adjustment for confounding variables, meat and fish consumption, but not dairy products, contributed to vitamin B12 concentrations. Meat and diary products strongly contributed to breast-milk concentrations of dieldrin and PCBs, fish to PCB 118, and smoking to DDT and dieldrin. Our findings suggest that breast-milk contamination could be reduced by abstinence from smoking and a moderate intake of animal products. However, risk of nutritional deficiencies rules out complete avoidance of meat, fish or diary products. Quantitative research on the effects of a reduced consumption of animal products, as well as smoking, on breast-milk contamination is warranted.

Adult↗
PubMed1990

Variability in transepidermal water loss of the skin: evaluation of a method to assess susceptibility to contact dermatitis in epidemiological studies.

Transepidermal water loss (TEWL) has been suggested to be a measure which can be used to identify subjects at risk for the development of contact dermatitis. Transepidermal water loss is high when the barrier function of the skin is impaired. It is assumed that subjects with a high TEWL have skin which is more permeable to substances causing contact dermatitis. The inter-individual and intra-individual variability of simultaneous TEWL measurements and TEWL measurements over a period of three weeks were estimated in healthy individuals. The intra-individual coefficient of variation (CV) of simultaneous measurements was 13.5%. The intra-individual coefficient of variation of the measurements on consecutive days was somewhat higher (15.1%). The intra-individual coefficients of variation were low compared to the inter-individual coefficients of variation. The results indicate that transepidermal water loss is a stable personal characteristic, which can be studied as a risk factor in epidemiologic studies on contact dermatitis.

Adult↗
PubMed1990

Occupational exposure and 25-year incidence rate of non-specific lung disease: the Zutphen Study.

Information gathered in the Zutphen Study, the Dutch contribution to the Seven Countries Study that started in the 1960s, was used for the present study. In 1960 878 men participated in the physical examination and they were followed for 25 years until 1 July 1985. During this follow-up, their morbidity status was verified regularly. With this information the occurrence of chronic non-specific lung disease (CNSLD) at a specific time was coded by one physician, using strict criteria. The CNSLD diagnosis was based on the following criteria: episodes of respiratory symptoms such as regular cough and phlegm for longer than three months or episodes of wheezing and shortness of breath reported to the survey physician, or: diagnosis of CNSLD, including chronic bronchitis or emphysema by a clinical specialist. Occupation in 1960 was coded and used to generate specific occupational exposures with a Job Exposure Matrix. Because the exact time of diagnosis of CNSLD was known, incidence densities could be calculated. For 804 men a complete set of data was available. A Poisson regression analysis was used to analyse the relationships between the incidence density and independent variables like age, calendar period, occupation and specific occupational exposures. Blue collar workers had a significantly elevated incidence density ratio (IDR) compared to white collar workers (1.82, 95% confidence limits (CL): 1.35, 2.46). Subgroups of blue collar workers, wood and paper workers, textile workers, and tailors, construction workers and transport workers had significantly elevated IDRs also. Of the specific exposures heavy metals, mineral dust and adhesives had a significantly elevated IDR.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1989

Nutritional status of infants aged 4 to 18 months on macrobiotic diets and matched omnivorous control infants: a population-based mixed-longitudinal study. II. Growth and psychomotor development.

A mixed-longitudinal study was carried out in the 1985 Dutch birth cohort of macrobiotic infants aged 4-18 months (n = 53) and 57 omnivorous control infants matched for month of birth, sex, parity, educational level of the father and the residential area. Study methods included regular anthropometric measurements and a psychomotor testing. Reported birth weight was 180 g lower in the macrobiotic group than in the control group and was positively associated with maternal weight increase during pregnancy. Between 4 and 18 months of age, mean values for all anthropometric parameters were considerably lower in the macrobiotic infants. From birth to 4 months, weight gain was less in macrobiotic infants, and from 6 months the rate of growth in weight and length decreased further, reaching its lowest value between 8 and 14 months of age. A similar pattern was also observed for other anthropometric parameters. Between 8 and 14 months, arm circumference showed an absolute decrease. During this period, increase in arm muscle mass in the macrobiotic group was only half of that in the control group. From 14 months of age, growth stabilized parallel to the 10th percentile of the Dutch references. Gross motor and language development were also slower in the macrobiotic infants. The paediatrician observed major wasting of skin and muscles in 30 per cent of them. The growth rate for weight and arm circumference was independently associated with the energy intake and the protein content of the macrobiotic diet. Growth in length was positively associated with protein content of the diet, but not with energy intake.

Anthropometry↗
PubMed1988

Calcium supplementation: effect on blood pressure and urinary mineral excretion in normotensive male lactoovovegetarians and omnivores.

After an initial 4-wk period, 36 healthy male subjects aged 19-28 y (14 lactoovovegetarians and 22 omnivores) were given a supplement to their usual diet of 27.9 mmol calcium/d for 5 wk. During this period 22 blood pressure measurements were taken and 30 24-h urine specimens and 15 24-h dietary records were obtained. Base-line blood pressures did not differ significantly between vegetarians and omnivores (118.3/59.3 and 119.5/60.7, respectively). At the end of the supplementation period there was a decrease in diastolic blood pressure of 1.4 mm Hg (p less than 0.10) and an unexpected increase in systolic blood pressure of 2.1 mm Hg (p less than 0.01) in the omnivores. Although not significant, the same trends were observed in the vegetarians. In both groups Ca and magnesium excretions increased significantly and phosphorus excretion decreased significantly. Blood pressure of normotensive subjects with high basal Ca intake may not be sensitive to Ca supplementation.

Adult↗
PubMed1988

Weak associations in nutritional epidemiology: the importance of replication of observations on individuals.

Day-to-day variation within an individual's dietary intake may obscure associations between diet and disease. We calculated the extent of misclassification of subjects by dietary polyunsaturated to saturated fatty acid (P/S) ratio for 1, 3, 7 and 19 survey days per person. In 59 young women diet was estimated 19 times over a period of two and a half years by a 24-hour recall method. The dietary P/S ratio was compared with the P/S ratio in adipose tissue biopsies, which was used as the reference. The proportion of subjects properly classified increased with the number of survey days. Between three and seven recalls appeared to be most cost effective. The effect of misclassification on the observed odds ratio in a case-control study was calculated for a hypothetical distribution of exposure for cases and controls.

Adipose Tissue↗
PubMed1988

Do children on macrobiotic diets show catch-up growth? A population-based cross-sectional study in children aged 0-8 years.

Children who are fed alternative and especially macrobiotic diets have been reported to be smaller and weigh less than their peers fed omnivorous diets. To answer the questions: at what age does growth in children on macrobiotic diets slow down, and is there any return to standards later in childhood, a cross-sectional anthropometric study was performed in the Dutch macrobiotic child population aged 0-8 years (n = 243). Addresses were obtained from macrobiotic organizations and from families already participating in the study. Food habits were checked by a structured food frequency questionnaire. Anthropometric measurements included weight, height, mid-upper arm circumference and triceps and subscapular skinfolds. For each sex, age curves were constructed in comparison to standards. For selected age intervals, standard deviation scores (SDS) were tested for differences from the reference after accounting for confounding variables in a multiple regression model. Reported birth weight was 150 g lower than the Dutch reference; birth weight was positively associated with the consumption frequency of dairy products and fish. During the first 6-8 months of life, SDS were not different from the standard except for arm circumference and skinfolds. From 6-8 months onwards, growth stagnation occurred in both sexes, but was most marked in girls. A minimum level of 1 to 1.5 SD below the P50 of the reference was reached by the age of 18 months. Between 2 and 4 years a partial return towards the P50 occurred for arm circumference and, in boys only, for weight and skinfolds, but not for height. SDS of weight, height and arm circumference were higher in children from families with regular consumption of dairy products than in children from families avoiding dairy products.

Anthropometry↗
PubMed1988

Multiple overnight urine collections may be used for estimating the excretion of electrolytes and creatinine.

We studied the excretion of sodium, potassium, calcium, magnesium, and creatinine in overnight and 24-h urines collected over a period of seven consecutive days from 28 Dutch boys, ages eight and nine years. The correlation coefficients for the relation between true mean overnight and true mean 24-h excretion ranged between 0.94 and 1.00 for sodium, calcium, magnesium, and creatinine and was equal to 0.61 for potassium. Generally the within-person coefficients of variation for overnight excretions (range, 33-52%) were greater than for 24-h excretions (range 16-35%). We conclude that overnight collections may replace 24-h collections in the case of young boys, but that generally more overnight than 24-h urine specimens are required to achieve a similar degree of precision. The exact number of urine specimens required varies with the aims of the study.

Calcium↗
PubMed1988

Changes in body mass index in young adults in relation to number of life events experienced.

As part of an extensive longitudinal study, the effect of experiencing few or many life events on the development of the body mass index (BMI = weight/height2) over periods of 1 year and 2 years was examined in 350 men and 395 women, 20-35 years of age. Body weight was measured and a life event questionnaire referring to the preceding 6 months was completed every 6 months from spring 1981 through spring 1984. The change in BMI of subjects who experienced few or many life events was compared with the change in BMI of subjects who experienced an intermediate number of life events (the intermediate group). During the first year of follow-up, several subgroups of men and women who experienced many life events showed a gain in body mass. In several subgroups of men who experienced few life events a comparable effect occurred. After another year of follow-up this gain in body mass had disappeared in almost all subgroups. In the subgroup of men that tried to reduce their body weight by dieting during the follow-up period, the gain in body mass following few or many life events seemed to be permanent. In conclusion, the gain in body mass that may occur following the experience of many life events in women, seems to be effectively counterbalanced by regulatory mechanisms. In men, however, the experience of few or many life events may play a part in the aetiology of overweight.

Adult↗
PubMed1987

Assessment of intra-abdominal and subcutaneous abdominal fat: relation between anthropometry and computed tomography.

The ability to distinguish between intra-abdominal and subcutaneous abdominal fat may be important in epidemiologic and clinical research. In this study anthropometric measurements were taken from 71 men and 34 women presenting for routine computed tomography (CT). Areas of abdominal fat were calculated from CT scans made at the level of the L4 vertebra. The amounts of intra-abdominal and subcutaneous abdominal fat could be accurately predicted from several circumferences, skinfold measurements, body mass index, and age (R2 ranged from 0.79 to 0.84). In addition, it was found that the area of intra-abdominal fat on the CT scan was related to the waist:hip circumference ratio (r = 0.75 in men, r = 0.55 in women) and to the waist:thigh circumference ratio (r = 0.55 in men, r = 0.70 in women). The correlations of the circumference ratios with the areas of subcutaneous fat were invariably lower.

Abdomen↗