Socio-economic position and height in early adulthood

Do the short die young? Evidence from a large sample of deceased Polish adults

Body height is associated with various socioeconomic and health-related outcomes. Despite numerous studies, the relationship between stature and longevity remains uncertain. This study explores the association between self-reported height and lifespan. Data from 848,860 adults who died between 2004 and 2008 in Poland were collected. After excluding a small proportion of records due to missing data or errors, we examined records for 848,387 individuals (483,281 men, age range: 20–110 years; 365,106 women, age range: 20–112 years). Height was expressed as standardized residual variance derived from linear regression in order to eliminate the variance of year of birth on height. After the elimination of the cohort effect, five height classes were designated using centiles: very short, short, medium, tall and very tall. The differences between sexes and among classes were evaluated with two-way ANOVA and post hoc Tukey’s test. The effect size was assessed using partial eta squared (η2). Pearson’s r coefficients of correlation were calculated. The effect of sex on lifespan was nearly 17 times stronger than the effect of height. No correlation between height and lifespan was found. In conclusion, these findings do not support the hypothesis that taller people have a longevity advantage. We offer tentative explanations for the obtained results.

The dark triad, love components, and attachment styles in romantic relationship experiencing during young adulthood

The aim of this research was to clarify the nature of experiencing relationships in connection with the dark aspects of personality—Dark Triad. The study was conducted on a sample of 293 young adults (M_age = 22.9, SD = 3.4), 53.6% of females and 46.4% of males. The Slovak version of Short Dark Triad—SD3, the Slovak version of The Sternberg Triangular Love Scale (STLS) and the Slovak version of Experience in Close relationship—Revised were administered. The model of complex relationships of the Dark triad, components of love and attachment style explained 83% of the variation of the attachment style in a close relationship. The Dark triad had a direct negative effect on the love components and a direct positive effect on the attachment style in a close relationship. The components of love had a direct negative effect on the attachment style in a close relationship. In the model, gender differences were found.

Do blind people share the tall-man stereotype?

The stereotype of a tall man has been reported in numerous studies. High stature is commonly associated with advantages such as leadership skills, wealth, intelligence or social status, and actual differences between the short and the tall men were indeed found for these traits, mainly in favor of the tall men. It is not certain, however, whether the height-related effects are biologically determined or if they result from socially-driven mechanisms. In this study we wanted to explore whether congenitally blind individuals, who are unable to perceive other people’s stature through the most salient, visual channel, share the positive, height-related stereotype. Thirty-four congenitally blind and forty-three sighted men and women rated four positive characteristics of a tall or a short man. It was found that none of the traits assigned to the tall man by the sighted people was assigned to this person by the blind individuals. In the congenitally blind group, no differences between the assessments of the tall and the short man were revealed. We discuss our findings in the context of social perception and stereotypes research.

Developmental Trajectories of Bottle-Feeding During Infancy and Their Association with Weight Gain

OBJECTIVE

To describe patterns of bottle-feeding across the first year postpartum and explore whether bottle-feeding trajectories are differentially associated with infant weight gain.

METHOD

Data came from 1291 mothers who participated in the Infant Feeding Practices Study 2. Mothers completed a prenatal questionnaire and monthly surveys of infant feeding and growth between birth and 12 months. Group-based trajectory mixture modeling was used to describe developmental trajectories of bottle-feeding intensities across the first year. Growth curve modeling was used to explore associations between bottle-feeding intensity trajectory group membership and weight-for-age z-score (WAZ) trajectories from birth to 12 months.

RESULTS

Four qualitatively distinct trajectories of bottle-feeding were identified: (1) High-Stable: ∼100% of feeds from bottles across infancy; (2) Rapid-Increase: <30% of feeds from bottles during the neonatal assessment, increasing to ∼100% by 6 months; (3) Gradual-Increase: <10% of feeds from bottles during the neonatal assessment, gradually increasing to ∼100% by 12 months; and (4) Low-Stable: <5% of feeds from bottles across the majority of infancy. Bottle-feeding groups had significantly different WAZ trajectories across infancy; by 12 months, the High-Stable and Rapid-Increase groups had significantly higher WAZs compared with the Gradual-Increase and Low-Stable groups (p < .001). The association between bottle-feeding group membership and WAZ trajectories was not confounded by sociodemographic characteristics or the extent to which infants received breast milk.

CONCLUSION

High-intensity bottle use during early infancy may place infants at higher risk for excess weight gain. Supports and policies that help mothers delay high-intensity bottle use until later infancy are warranted.

Tonsillectomy, adenoidectomy and adenotonsillectomy rates in school-aged children: Relative contributions of socio-demographic and clinical features

OBJECTIVES

The present study sought to investigate the frequencies of tonsillectomy, adenoidectomy and both adenotonsillectomy (T&A) among 6-12 years old children. In addition, we tried to find out the predictors associated with these previous upper respiratory tract (URT) surgeries.

METHODS

This cross-sectional study consisted of 1900 children educated in 3 different elementary schools in Ankara, Turkey. Data about demographics and health conditions were obtained from survey questionnaires completed by parents.

RESULTS

Of the 1900 children, 15 children (0.8%) previously underwent tonsillectomy, 43 children (2.3%) had adenoidectomy and 80 children (4.2%) had T&A surgical histories. Multiple logistic regression analysis revealed that older students compared to younger ones [odds ratio (OR) = 1.15, p = 0.011], and those who had parent-reported apnea compared to subjects without apnea were more likely to have URT surgery histories [OR = 2.34, p = 0.001]. Those children with surgery histories were more likely to have fathers with a higher educational level [medium level: OR = 2.07, p = 0.012; high level: OR = 2.79, p = 0.001 vs. low level) and the subjects had greater BMI percentiles [overweight: OR = 1.71, p = 0.036; obesity: OR = 2.32, p = 0.003 vs. healthy weight]. Children who had 1-2 URT infections per year [OR = 0.47, p = 0.019] had less probability of URT surgery histories, whereas those children with AOM ≥ 3 times per year [OR = 2.52, p = 0.003] had more probability of URT surgery history.

CONCLUSIONS

We conclude that a reasonable explanation for higher rates of URT surgery among children with a high level of paternal education may originate from their awareness about URT associated diseases and possibly due to the ease of access to health care services.

Socioeconomic differences in childhood length/height trajectories in a middle-income country: a cohort study

BACKGROUND

Socioeconomic disadvantage is associated with shorter adult stature. Few studies have examined socioeconomic differences in stature from birth to childhood and the mechanisms involved, particularly in middle-income former Soviet settings.

METHODS

The sample included 12,463 Belarusian children (73% of the original cohort) born in 1996-1997, with up to 14 stature measurements from birth to 7 years. Linear spline multi-level models with 3 knots at 3, 12 and 34 months were used to analyse birth length and growth velocity during four age-periods by parental educational achievement (up to secondary school, advanced secondary/partial university, completed university) and occupation (manual, non-manual).

RESULTS

Girls born to the most (versus least) educated mothers were 0.43 cm (95% confidence interval (CI): 0.28, 0.58) longer at birth; for boys, the corresponding difference was 0.30 cm (95% CI: 0.15, 0.46). Similarly, children of the most educated mothers grew faster from birth-3 months and 12-34 months (p-values for trend ≤ 0.08), such that, by age 7 years, girls with the most (versus least) educated mothers were 1.92 cm (95% CI: 1.47, 2.36) taller; after controlling for urban/rural and East/West area of residence, this difference remained at 1.86 cm (95% CI: 1.42, 2.31), but after additionally controlling for mid-parental height, attenuated to 1.10 cm (95% CI: 0.69, 1.52). Among boys, these differences were 1.95 cm (95% CI: 1.53, 2.37), 1.89 cm (95% CI: 1.47, 2.31) and 1.16 cm (95% CI: 0.77, 1.55), respectively. Additionally controlling for breastfeeding, maternal smoking and older siblings did not substantively alter these findings. There was no evidence that the association of maternal educational attainment with growth differed in girls compared to boys (p for interaction = 0.45). Results were similar for those born to the most (versus least) educated fathers, or who had a parent with a non-manual (versus manual) occupation.

CONCLUSIONS

In Belarus, a middle-income former Soviet country, socioeconomic differences in offspring growth commence in the pre-natal period and generate up to approximately 2 cm difference in height at age 7 years. These associations are partly explained by genetic or other factors influencing parental stature.

TRIAL REGISTRATION

Current Controlled Trials: NCT01352247 assigned 9 Sept 2005; ClinicalTrials.gov. Identifier: NCT01561612 received 20 Mar 2012.

Height preferences in humans may not be universal: evidence from the Datoga people of Tanzania

Many studies in Western societies have shown that women prefer relatively taller men as potential partners, whereas men prefer women who are slightly shorter than themselves. Here, we discuss possible limitations of previous results within the context of the stimuli used (i.e., differences in the perceived body size of female silhouettes). Our results show that, at least in a Polish sample (N=231), modified stimuli did not essentially change the observed male-taller preferences. In contrast, we report height preferences in a traditional ethnic group, the Datoga people from Tanzania (N=107), in which men and women preferred extreme sexual dimorphism in stature (SDS) sets (i.e., men and women chose women much taller or much shorter than themselves). Thus, our data do not accord with the suggestion of a universal preference for taller men, but rather suggests that height preferences may be influenced by cultural, environmental, and ecological conditions.

Effects of socioeconomic change from birth to early adulthood on height and overweight

BACKGROUND

In this work we explored the association of height and overweight with change in socioeconomic position between birth and 19 years of age.

METHODS

A birth cohort has been followed-up in Pelotas, Brazil, since 1982. All 5914 hospital births were enrolled in the study just after delivery. In 2001, 27% of the cohort subjects were sought, and 1031 (69% of the survivors) were interviewed. Weight and height were obtained for women; men had been examined 6 months earlier. Information on family income in 1982 and 2001 was used to classify the sample into tertiles, the lowest classified as 'poor' and the other two as 'non-poor'. Four trajectories resulted: always poor, never poor, poor at birth/non-poor at 19, and non-poor at birth/poor at 19-which were compared in terms of mean height and prevalence of overweight.

RESULTS

Height showed a similar behaviour for men and women, with the never poor presenting the highest mean, followed by those who were non-poor at birth and later became poor. Those who were poor at birth, regardless of later status, were shortest. Overweight was approximately twice as common among men who were never poor in relation to the others. Among women, those who were always poor presented the highest prevalence of overweight. In this case, social determination seems to be complex and may involve aspects of lifestyle and behaviour acting differently for each gender.

CONCLUSION

Socioeconomic trajectories affected both height and overweight, the effect on the latter being different for each gender.

Genetic and environmental correlations between bone phenotypes and anthropometric indices in Chinese

Height, weight, bone mineral density (BMD), and bone size are all influenced by genetic and environmental factors as well as interactions between them. Height and weight are often used in population studies to adjust the bone phenotypes. However, it is still unknown what proportion of genetic and environmental variability is shared between these anthropometric characteristics and the bone phenotypes. The genetic and environmental correlations between the bone phenotypes and anthropometric indices in Chinese subjects were studied by bivariate quantitative genetic analysis on a sample of 931 healthy subjects from 292 Chinese nuclear families aged from 19 to 79 years. BMD and bone size at the lumbar spine (L1-L4) and the hip of all subjects were measured by dual-energy X-ray absorptiometry. We found significant genetic correlations between weight and spine BMD, hip BMD, spine bone size and hip bone size, which were 0.50 (P<0.01), 0.45 (P<0.01), 0.36 (P=0.02), and 0.38 (P<0.01), respectively. Likewise, significant genetic correlations between height and spine BMD, spine bone size, and hip bone size were 0.30 (P=0.02), 0.54 (P<0.01), and 0.58 (P<0.01), respectively. The environmental correlations were found to be significant only between height and spine bone size (P<0.001) and weight and hip BMD (P=0.02). These results suggest the probability that the same genetic and environmental factors contribute to these different phenotypes. Moreover, when a candidate gene or genomic region is responsible for the variation of both bone phenotypes and anthropometric indices, its true genetic effect on the bone phenotypes may be lost after one has adjusted the phenotypic values with weight and height as random environmental factors. It may have implications for population studies of candidate genes that underlie the complex bone phenotypes and for the development of strategies for therapeutic application.

Effects of otorhinolaryngological diseases and socioeconomic status on school performance: a survey study

OBJECTIVE

The aim of the present study was to investigate the effects of otorhinolaryngological (ORL) diseases and socioeconomic status (SES) on school performance.

METHODS

This study was conducted in three primary schools located in Düzce. Of three schools, two schools (group A) are located in the suburb area of the city and students had a low SES. The other one (group B) is in the center of the city and students had a high SES. A total of 1282 (urban 609 and rural 673) students attending to these three schools were examined considering the ORL diseases. SES of the students were evaluated according to the mean monthly income within the family, educational level of parents and occupation, presence of conflict within the family, and smoking habits. School performance of the children is ranged between 1 and 5. School success of students were evaluated by asking their educators.

RESULTS

The mean (S.D.) age was 9.15 (1.48) years (range, 7-12). The students in group B were observed as more successful than that of group A. A major finding in this study is that the incidence of ORL diseases in the rural school is high and it was found that when ORL diseases increased, the mean school success grade of the students decreased in group B. The otological diseases were found to have an effect on school performance more than the other ORL diseases independently of SES. When we analyzed the effect of SES on school performance, we found that the students' school grade level in group A was low.

CONCLUSIONS

ORL diseases are more commonly detected in the primary schools with lower socioeconomic level than the other and we found that the effects of ORL diseases and SES on school performance in group B was low.