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Social inequalities in perceived health and the use of health services in a southern European urban area.

People of lower social class have worse health and less access to health services and preventive care. This article describes social class inequalities in health status and use of services, both curative and preventive, in Barcelona, in a country with a national health service. The cross-sectional study uses information from the 1992 Barcelona Health Interview Survey. Social class was designated using an adaptation of the British Registrar General classification. The study variables measured health status, health services utilization, and preventive practices. Bivariate and multivariate analyses were used. Some 88 percent of men in social class I and 81 percent in class V had very good or good perceived health status. For women these figures were 85.2 and 57.6 percent, respectively. Chronic illness increased with lower social class. There were no social class differences in the frequency of physician visits during the two weeks prior to the interview among people with poor perceived health. Some 60.7 percent of women aged over 29 in social class I had periodic cervical smears, but only 32 percent of those in class V; the corresponding figures for mammography were 37.8 and 11.3 percent. The national health service has advantages in terms of access to health services, but more knowledge about the quality of these services is required. The study findings are sufficient to defend the undertaking of equitable health policies, especially in providing access to preventive care for the entire population.

Adolescent↗

Associations between BMI, social strata and the estimated energy content of foods.

OBJECTIVE: Many studies have shown that the prevalence of obesity is greater in lower social classes. The reasons for this effect however are unclear. Since there is also a link between education and social class, and an association between education and prevalence of obesity, one hypothesis is that lack of education about energy contents of foods may contribute to the effects of social class on obesity. SUBJECTS: We tested the hypothesis that knowledge of food energy contents is associated with differences in body mass index (BMI) in a sample of 346 people of both genders, aged between 18 and 45 y, of variable body mass index and drawn from different social strata. RESULTS: Estimates of food energy contents were on average well correlated with the actual energy contents, but individual estimates were very poor in all subpopulations of this sample. We found that subjects of different BMIs did not differentially estimate the energy contents of foods high in carbohydrate, but low in fat and protein (fruit and bread). However, foods that contained high fat contents, independent of the other macronutrients present, were generally perceived to have significantly lower energy contents by obese people than nonobese subjects (although this was not observed for all high-fat foods). Overall, this difference interacted with social class, such that the difference between the BMI groups was exaggerated in the lower social stratum but abolished in the higher social class. Binary logistic regressions revealed that the probability of being obese (BMI>30 kg/m2) in the lower social class group was significantly negatively associated with the estimated food energy content of most high-fat foods. Such an association was not found in the higher social class group. In the lower social class group, overall food knowledge appeared superior in the leaner subject group (BMI<30 kg/m2), but obese subjects were actually better at estimating the energy contents of snacks and alcoholic beverages. The leaner group significantly overestimated the energy contents of these items. CONCLUSION: Differences between individuals in estimates of food energy contents may contribute to the development of obesity in lower social strata. Whether this is driven by a protective effect in lean subjects of overestimating the energy contents of certain foods (snacks and alcoholic beverages) or a susceptibility in the obese because they underestimate the energy contents of other foods is not certain. Knowing which of these alternatives is true is important and may help design public health education programmes directed at these people to help alleviate the obesity epidemic.

Adolescent↗

Stratification and smoking: a search for class-based smoking lifestyles.

This study looked for evidence of distinctive smoking lifestyles among social classes. Data on smoking attitudes and behaviors were collected via interviews of a representative sample of residents of a major western Canadian city. Four indicators of social class position (based on two approaches to conceptualizing social class) were employed. Regardless of the indicator of class used, few attitudinal or behavioral differences between social classes were found. The results suggest that the multi-faceted approach to smoking prevention in Canada has fostered a general climate of opinion which is antagonistic to smoking. Sociological factors which can lead to misperceptions of the extent of social class differences in smoking are discussed.

Adolescent↗

Cognitive ability and occupational status in a British cohort.

The relation between individual trait differences, social mobility and social structure is central to social biology. Because genetic variance underlies phenotypic variance in some of these traits, for example IQ, several mechanisms determine the population variance. Polygenic inheritance is the basic mechanism. Social mobility and assortative partner choice distribute the trait variance within generations. This feedback circle is constrained by sociological conditions at several levels of analysis. Fundamental to this theory of social assortment is the relation between social-biological traits and social class on the one hand, and these traits and social mobility on the other hand. The focus here is on the relation between social class, social mobility and cognitive ability. The National Child Development Study is drawn upon, including the last follow-up (1999-2000). By approaching this relationship through various methods, both social-biological and sociological aspects of this research question can be assessed.

Achievement↗

Time trends in socioeconomic differences in incidence rates of cancers of gastro-intestinal tract in Finland.

BACKGROUND: The magnitude of socioeconomic differences in health varies between societies, and over time within a given society. We studied the association between social class and incidence of cancers of the gastro-intestinal tract over time in a large cohort in Finland. METHODS: We studied social class variation among 45-69 year-old Finns during 1971-95 in incidence of cancers of the gastro-intestinal tract by means of a computerized record linkage of the Finnish Cancer Registry and the 1970 Population Census, which included social class data. RESULTS: There were 2.3 million individuals in the cohort under follow-up, with 1622 cases of cancer of the esophagus, 8069 stomach (non-cardia), 1116 cardia, 408 small intestine, 6361 colon, 5274 rectum, 1616 liver, 1756 gallbladder, and 5084 pancreas during 1971-1995. Cancers of the esophagus, stomach, cardia, gallbladder and pancreas were most common among persons belonging to a low social class. Cancers of the small intestine in males only, colon in both genders, and rectum in females were most common in the higher social classes. Incidence of stomach cancer decreased and incidence of colon cancer increased over time in both genders in all social classes, and the large differences between social classes remained unchanged over time. Incidence rates of cardia cancer did not change substantially over time. CONCLUSION: There is a large variation in incidence of cancer of the gastrointestinal tract by social class in Finland. Although much of the observed social class differences probably could be explained by known etiological factors such as diet, physical exercise, alcohol consumption, smoking and exogenous hormone use, part of the variation is apparently attributable to largely unknown factors.

Aged↗

A two-year longitudinal study of dietary intake in relation to the growth of 405 English children initially aged 11-12 years.

This report is of a two-year longitudinal study of dietary intake and growth in height and weight of 405 children, initially aged 11-12 years. Between 1979 and 1981 they each recorded their food intake on five occasions for three consecutive days using a diet diary with a 20 min private interview on the fourth day. Computerized food tables were used. Social class was recorded. The usual differences in height, weight and growth increments between the social classes were found. There were no significant differences in nutrient intake between social classes. Within a social class there were few statistically significant correlations between energy or protein intake and height or weight increments. It was concluded that a very high reliability of food intake measurements would be required in order to relate diet to growth and many other factors (e.g. energy expenditure, body composition and puberty) may also mask any such relationship. Social class alone would seem an inadequate means of allowing for such factors.

Body Height↗

Studies on the prevalence and epidemiology of urinary stone disease in men in Leeds.

A postal survey among 2% of men in Leeds showed that the prevalence of urinary stone disease is 3.8%. The prevalence of upper urinary tract and spontaneously passed stones increases progressively from 0.7% in social class 5 to 5.0% in social class 1 but that of bladder stones (0.7% in the group as a whole) is independent of social class. There is an initial peak of upper urinary tract and spontaneously passed stones commencing at age 20 and having a projected prevalence at age 90 of 5.7% and a second peak of bladder stones, commencing about age 50, with a projected prevalence of 1.9%. The prevalence of stone disease increases according to the order: single less than divorced/separated less than married less than widowed men. A family history of stones tends to be higher amongst relatives of stone-formers than amongst the corresponding relatives of control subjects, the male/female ratio being 2:1. The occurrence of urinary stones is significantly associated with that of gallstones, high blood pressure, backache, arthritis and gout but not with that of peptic ulcer, diabetes, thyroid disease or bronchitis.

Adult↗

Use of butter and cheese in 10 European countries: a case of contrasting educational differences.

BACKGROUND: This paper aims to analyse socioeconomic variation in the use of cheese and butter in Europe by reviewing existing dietary surveys. It explores whether socioeconomic differences in the intake of these foods follow a similar pattern in all countries. METHODS: An overview of available studies on socioeconomic differences in food habits in Europe over the period 1985-1997 was performed. Twenty studies from 10 countries included information on cheese and butter. A simple directional vote-counting method was used to register the association between educational level and consumption of cheese and butter (animal fat) for each study. FAO's food balance sheets were used to classify the countries according to consumption trends of these foodstuffs. RESULTS: In all countries higher social classes used more cheese than lower classes. The results for butter were less consistent. In the Nordic countries higher social classes used less butter than lower ones. In the other countries an opposite pattern or no differences could be observed. However, in countries where the use of both butter and animal fats could be analysed, animal fats were used more by the lower social classes. CONCLUSIONS: Higher and lower socioeconomic groups have different sources of saturated fats. Higher social classes use more cheese whereas lower social classes use more butter or animal fats. This can be observed especially in countries where the consumption of cheese is increasing and that of butter decreasing. Higher social classes prefer modern foods, lower classes traditional foods.

Butter↗

[Changes in smoking habits in a Danish population from 1983 to 1988].

Changes in smoking habits are described for 2,986 danes aged 30, 40, 50 and 60 examined in 1983 as part of the MONICA survey and reexamined five years later. In this period the prevalence declined by 8.1% for men and 5.9% for women. Smoking was related to social class, with an increasing proportion of smokers with decreasing social class. In 1988 the social differences had increased for females. The prevalence of cessation was 17.6% for males and 17.2% for females. The highest proportion of cessation was found among 60 year-old males. The average consumption of tobacco in the group of smokers increased over the period, the increment was higher the younger the person. The prevalence of heavy smokers (20 grams or more daily) increased especially in younger persons. The proportion of young heavy smokers was highest in the lowest social class. By logistic regression a low tobacco consumption was the most important factor associated with cessation. In addition, high social class was associated with cessation for women.

Adolescent↗

Social inequalities in male mortality amenable to medical intervention in British Columbia.

The objective of this study is to examine the rates of mortality among different social classes and socioeconomic groups of British Columbian males from causes of death amenable to medical intervention. We examined the rates of avoidable mortality from the causes of death published by Charlton, excluding causes of death restricted to women as well as perinatal deaths. For the purposes of our study, we determined a population at risk using 20% samples of occupational data for men from the 1981, 1986 and 1991 censuses conducted by Statistics Canada. For the analysis of mortality by social class, individuals were divided into five social class levels based on occupation using an adaptation of the UK Registrar General's Social Class Scale. In addition, three levels of socioeconomic analysis were performed using the Blishen Index classification system. Once individuals were assigned to a social class in each classification system, the death rates from each amenable cause was calculated and standardized to the total population. For almost every cause of death examined, the rate of mortality was higher in individuals of lower social and socioeconomic classes than in individuals of the upper social and socioeconomic classes. These results were consistent regardless of the social class component, education, occupation, or income was being measured. The mortality gradient was most notable in deaths due to hypertensive heart disease, tuberculosis, asthma and pneumonia and bronchitis. Due to the fact that these causes of death were observed to be consistently higher in the lower social classes, we feel that specific measures aimed at improving survival from these conditions in lower social classes could help to amend the social class disparity.

Adolescent↗

Socioeconomic position in childhood and cardiovascular risk factors in older Spanish people.

OBJECTIVE: To investigate the association between childhood social class and the prevalence of cardiovascular risk factors in the elderly. METHODS: Cross-sectional study of 4009 subjects representative of the Spanish non-institutionalized population aged >or =60 years, for whom information was available on father's occupation. We estimated the prevalence of hypertension, obesity, diabetes mellitus, physical inactivity, smoking, and alcohol intake. RESULTS: Belonging to a working social class in childhood is associated with increased hypertension, having ever smoked, and heavy alcohol intake, independent of adult social class in men. No association was found between social class in childhood and the other cardiovascular risk factors in men. Belonging to a working social class in childhood is associated with increased general obesity, abdominal obesity, diabetes mellitus, and physical inactivity in women, but the size of the association for abdominal obesity and diabetes mellitus decreases and the statistical significance disappears after adjusting for adult social class. The highest smoking prevalence was observed in women who were in social class I in childhood and the lowest in women who were in social class IV. CONCLUSIONS: The results of this study show increased prevalence of some cardiovascular risk factors in men who belong to a working social class in childhood, but they do not support the existing evidence about an association between adverse social circumstances in childhood and increased prevalence of cardiovascular risk factors in later life in women.

Aged↗

Obesity in relation to socioeconomic status. A population study of women in Göteborg, Sweden.

In a population sample of 1462 middle-aged women socioeconomic data were studied in relation to obesity, assessed by a body weight index. Education, annual income, and social class were negatively correlated with weight index (WI). Husband's social class was a stronger determinant of obesity in the woman than her own class. Age of husband and number of children were significantly correlated with WI. There was also a weak correlation between being single and WI. Sick leave was not correlated to WI. Pension was correlated to WI when adjusted for age, but not when allowance was also made for social class. Age, husband's social class, education, husband's income, and number of children were independent predictors of WI among the married women. In the single women, age and own income were independent predictors of WI but not number of children, education or own social class.

Adult↗

Early ear problems and developmental problems at school age.

Retrospective history of middle ear disease was compared with developmental diagnosis in 507 consecutively referred school-age children. History of major ear problems was positively associated with discrepancies between the performance and verbal IQ on the WISC-R. History of major ear problems was positively associated with the presence of articulation disorders for children in the low social class, hyperactivity in the middle social class, and language problems in the high social class. A history of significant middle ear disease in early childhood should raise concerns for articulation difficulties and possible language problems in children presenting to clinicians with school problems.

Adolescent↗

Social inequality and environmentally-related diseases in Germany: review of empirical results.

A literature search was conducted aiming at all empirical studies from Germany till mid 1997 containing data on the association between environmentally-related diseases and the socio-economic status (education, occupation, income, social class) and/or on the association between the exposure to harmful substances and the socio-economic status. With respect to the exposures, a clear picture becomes visible: the concentration of harmful substances in the ambient air as well as indoors is considerably higher with regard to the lower social class as compared with the higher social class. This applies to children as well as to adults and to West Germany as well as to East Germany. However, with respect to environmentally-related diseases, no such clear picture becomes visible. For example, several studies indicate that allergies, atopic eczema and croup occur less frequently in the lower social class than in the higher social class. Malignant tumours (lung cancer, kidney cancer or bladder cancer), however, seem to occur more frequently in the lower social class than in the higher social class. Environmental-epidemiological studies should increasingly integrate socio-epidemiological study approaches and explicitly present their results.

Adolescent↗

Advice from the obstetrician and other sources: do they affect women's breast feeding practices? A study among different Jewish groups in Jerusalem.

Breast feeding practices and the sources of advice that influenced them were studied in a sample of 276 women from North East Jerusalem. They were followed-up for 4 1/2 months and interviewed on 4 occasions during that period. It was found that 89.7% started breast feeding after parturition, 62.4% were breast feeding by 6 weeks, 40.3% were breast feeding after 3 months and 27.3% were still breast feeding by 4 1/2 months postpartum. Obstetrician's advice given at the 6 weeks postpartum examination was significantly associated with duration of breast feeding (P = 0.001). Other sources of guidance were not significantly related to duration of breast feeding when controlling for social class. Analysis of variance indicated that women of higher social classes breast fed more and for a longer period of time. There was no difference in the pattern of attendance at the obstetrician's examination by social class, although a very small proportion of women belonging to the lower social classes reported getting advice on breast feeding during that visit. There was a strong relation between advice of the obstetrician and percentage of women breast feeding 4 1/2 months postpartum. Country of origin of the women also affected breast feeding practices. Women of Western origin breast fed more and longer than women of Asian or North African origin. This might be explained by social movements that attempt a return to more natural life styles which are prominent in Western societies. The differential relationship between advice of obstetrician and women belonging to different social classes is discussed and key elements in the relation between obstetrician's advice and women's breast feeding practices are considered.

Breast Feeding↗

Social inequalities in health related behaviours in Barcelona.

OBJECTIVE: This study describes social class inequalities in health related behaviours (tobacco and alcohol consumption, physical activity) among a sample of general population over 14 years old in Barcelona. DESIGN: Cross sectional study (Barcelona Health Interview Survey). SETTING: Barcelona city (Spain). PARTICIPANTS: A representative stratified sample of the non-institutionalised population resident in Barcelona was obtained. This study refers to the 4171 respondents aged over 14. DATA: Social class was obtained from a Spanish adaptation of the British Registrar General classification. In addition, sociodemographic variables such as family structure and employment status were used. As health related behaviours tobacco consumption, alcohol consumption, usual physical activity and leisure time physical activity were analysed. Age adjusted percentages were compared by social class. Multivariate analysis was performed using logistic regression models. MAIN RESULTS: Women in the upper social classes were more likely to smoke, the adjusted odds ratio (OR) for social class V in reference to social class I was 0.36 (95% confidence intervals (95%CI): 0.19, 0.67), while the opposite occurred among men although it was not statistically significant in multivariate analysis. Smoking cessation was more likely among men in the higher classes (OR for class V 0.41, 95%CI: 0.18, 0.90). Excessive alcohol consumption among men showed no differences between classes, while among women it was greater in the upper classes. Engaging in usual physical activity classified as "light or none" in men decreased with lowering social class (OR class IVa: 0.55 and OR class IVb: 0.47). Women of social classes IV and V were less likely to have two or more health risk behaviours (OR for class V 0.33, 95% CI: 0.18, 0.62). CONCLUSION: Health damaging behaviours are differentially distributed among social classes in Barcelona. Health policies should take into account these inequalities.

Adolescent↗

Health inequalities in early adulthood: a comparison of young men and women in Britain and Finland.

Several studies have recently reported that social class differences in ill-health during adolescence are almost non-existent or invisible. The aims of this comparative study of two different welfare states are first, to compare whether the relationship between social class and health is similar among young men and women at different age groups in these two welfare states; second, to examine at what age social class differences in self-reported health and illness among young adults emerge in these two countries; and third, to find out whether class of origin (i.e. parental social class) or class of destination (i.e. individual's achieved social class) have greater explanatory power in studies of health among young adults. We used comparable nationally representative interview surveys from Britain and Finland. The British data is derived from the General Household Survey for 1988 and 1989, and the Finnish data from the 1986 Level of Living Survey. We analysed five year age groups between 16 and 39 years in Britain (N = 16,626) and 15 and 39 years in Finland (N = 5950). Two health indicators (limiting long-standing illness and self-assessed health), and several indicators for social class were compared. The best discriminator of differences in ill-health among young adults both in Finland and Britain was education. Social class differences by own occupation (achieved class) emerged soon after the age of 20 among men and women in both countries and strengthened with increasing age. There was a weaker but consistent association with class of origin in both countries. Housing tenure is strongly associated with young adults' health in Britain but not Finland.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗

Social inequalities in low birth weight: timing of effects and selective mobility.

The risk of giving birth to a low birth weight baby is known to be associated with poor material circumstances during the mother's own childhood. In addition to this long-term effect, an association is also apparent of low birth weight with the mother's current social class, measured in terms of her husband's occupation. At least two interpretations of this are possible: a true short-term effect, and/or selective social mobility (upward or downward). According to the latter hypothesis, social class at marriage reflects the operation of selective social processes such that taller and better educated women tend to marry men of higher social class: because both attributes are negatively associated with the risk of low birth weight, a short-term effect is mimicked. This paper investigates the strength of this effect, using data from a longitudinal study, the National Child Development Study. The possibility is also explored that the social class gradients at different ages are not independent: for example that a beneficial socio-economic environment in early life can compensate for hardship later on, in terms of the risk of low birth weight, and vice versa. A social class gradient was observed in the proportion of low birth weight deliveries, both at the time of the respondent's own birth and at the time of her marriage. Depending on the assumption made concerning the relationship of height with low birth weight, selective mobility for height explained 10.7% or 16.3% of the apparent short-term gradient in low birth weight. Selective mobility for educational level did not have any effect. Further analyses suggested that having belonged to a higher social class either in early childhood or at marriage had a beneficial effect, notwithstanding the direction of any mobility experienced. The social class of the woman's father when she was 16 was not associated with the low birth weight rate, and upward mobility during the respondent's childhood appeared to carry an increased risk.

Body Height↗