Large-scale ensemble averaging of ambulatory impedance cardiograms

Impedance cardiography has been used increasingly to measure human physiological responses to emotional and mentally engaging stimuli. The validity of large-scale ensemble averaging of ambulatory impedance cardiograms was evaluated for preejection period (PEP), interbeat interval, and dZ/dt_(min) amplitude. We tested whether the average of “classical” 60-sec ensemble averages across periods with fixed activity, posture, physical load, social situation, and location could be accurately estimated from a single large-scale ensemble average spanning these entire periods. Impedance and electrocardiograms were recorded for about 24-h from 21 subjects. Recordings were scored by seven raters, using both methods for each subject. Good agreement (average intraclass correlation coefficient was .91) between both ensemble averaging methods was found for all three cardiac function measures. The results indicate that for unambiguous ambulatory impedance cardiograms, large-scale ensemble averaging is valid, which makes measuring prolonged changes in cardiac sympathetic activity by measuring ambulatory PEP feasible even in large epidemiological samples.     

Timing of Stressful Life Events Affects Stability and Change of Neuroticism

Neuroticism is a predictor of many health problems. To study the determinants of within‐subject change in neuroticism, three hypotheses were tested: (i) subjects who experienced stressful life events (SLEs) show an increase in neuroticism; (ii) high baseline neuroticism moderated this effect; and (iii) recent SLEs had a greater impact on neuroticism than distant SLEs. Data came from the Finnish Twin Cohort. Neuroticism data were collected in 1975 and 1981 and SLEs data in 1981 (n = 21 085). By entering baseline neuroticism as a predictor for neuroticism at follow‐up, the outcome measure was change in neuroticism. Changes in neuroticism were predicted from SLE indices or their interaction with baseline neuroticism. Timing of SLEs was taken into account by distinguishing recent from distant SLEs. To control for confounding by shared genes and environments, both within‐twin pair and between‐twin pair effects were tested for monozygotic and dizygotic twin pairs separately. Neuroticism's six‐year stability was high (r = .58, p < .001). Exposure to SLEs modestly increased neuroticism (βs > .55, ps < .001), unconfounded by shared genes. This effect was not moderated by high baseline neuroticism. Recent SLEs (.09 < βs < .15) had more impact than distant SLEs (.03 < βs < .11; ps < .01). In conclusion, the findings strongly supported a model of environmentally driven SLEs causing dynamic fluctuations around a person's set point of neuroticism. Copyright © 2013 John Wiley & Sons, Ltd.     

Exploring consumers' health meaning categories: towards a health consumption meaning model

• Health marketplace offers a lucrative business for many companies. However, there is a gap in consumer research in understanding what health as a target of consumption really means to consumers. The subtleties and multiplicity of meanings rural and urban (both younger and older) consumers attach to health in their everyday lives are empirically explored in this article. Findings of a focus group interview‐based interpretive analysis are reported. It was found that meanings consumers associate with health are profound and multi‐faceted (identification of several health‐meaning categories) with some evidence for age‐ and area‐of‐ residency‐related health‐meaning differences. The article is concluded by advancing theory‐building in consumer research in the form of developing a tentative framework model that can be used to analyze health consumption meanings.

Copyright © 2006 John Wiley & Sons, Ltd.     

Impulsivity as a predictor of newly-diagnosed peptic ulcer disease: A prospective cohort study

We examined the role of impulsivity in the development of peptic ulcer disease (PUD). The subjects were initially healthy 4636 hospital employees aged 19–62 who responded to a questionnaire on personality, health habits, mental health, and PUD in 1998 and 2000. We used multivariate logistic analyses to determine the relationship between impulsivity and newly-diagnosed PUD among those employees who did not have PUD at baseline. Impulsivity was assessed with the Karolinska Scale of Personality. High level of impulsivity was associated with increased 2-year incidence of doctor-diagnosed PUD after adjustment of age, gender, education and shift work (odds ratio = 2.42, 95% confidence interval = 1.21–4.82). Additional adjustment for the effects of smoking, alcohol consumption, BMI, physical activity, minor psychiatric morbidity and diagnosed depression and other psychiatric disease had little effect on this relationship. The present study suggests that impulsivity may be a risk factor for the development of PUD.     

Association of pupil vandalism, bullying and truancy with teachers' absence due to illness: a multilevel analysis

The aim of this study was to examine whether vandalism, bullying, and truancy among pupils at school are associated with absence due to illness among teachers. Data on such problem behaviour of 17,033 pupils in 90 schools were linked to absence records of 2364 teachers. Pupil reported vandalism and bullying at the school-level were associated with teachers' short-term (1- to 3-day) absences. Cumulative exposure to various forms of pupils' problem behaviour was associated with even higher rates of short-term absences among teachers. No association was found between pupils' problem behaviour and teachers' long-term (>3-day) absences. In conclusion, there seems to be a link between pupils' problem behaviour and teachers' short-term absence due to illness. Further work should determine whether problem behaviour is a cause or a consequence of absences or whether the association is noncausal.     

Disparity in occupational training and career planning between contingent and permanent employees

In modern work life, a common structure of staffing comprises a core of permanent employees and a fluctuating number of contingent workers. We examined the degree to which participation in occupational training and career planning differed between these two groups. The study cohort comprised 5127 hospital employees (96% full time), of whom 4211 were permanent, 677 had a contingent contract, and 239 were contingent at baseline but got a permanent job during the 4-year follow-up period. Results show that contingent employees participated less in occupational training and career planning than permanent employees. The difference remained significant even after 6 years' employment in the hospital. Those contingent employees who became permanently employed did not differ from the permanent employees in occupational training and career planning. These trends in human resource allocation support the human capital theory. They also point to an unintended mechanism potentially increasing inequalities in the workforce, arising from the different human capital investments depending on the employment status.     

Personality as a moderator in the relations between perceptions of organizational justice and sickness absence

This longitudinal study examined whether hostility and neuroticism moderated the effect of organizational justice perceptions on short-term sickness absence among 506 male and 3570 female hospital employees. Organizational justice perceptions were assessed using a questionnaire on procedural and relational justice. Self-certified sickness absence records at baseline and during the two-year follow-up were derived from employers’ registers. Hierarchical moderated Poisson regression models suggest that low procedural justice perceptions related to increased sickness absence more in hostile men than in other male employees. Low relational justice perceptions were a greater risk for sickness absence for male employees with higher neuroticism than for their colleagues with lower neuroticism.     

Impulsivity as a predictor of smoking and alcohol consumption

This prospective study examined the relationships between impulsivity, smoking and alcohol use in a large non-clinical sample of 601 men and 4832 women working in 12 Finnish hospitals. Data on impulsivity, smoking and alcohol consumption were collected by two questionnaires with a two-year interval. At baseline, impulsivity was associated with smoking and alcohol use. After controlling for baseline smoking, impulsivity predicted increased number of cigarettes smoked per day in women (p=0.08), but not in men. After controlling for alcohol use at baseline, impulsivity predicted increased alcohol consumption similarly in both genders (p<0.01). Higher impulsivity was also associated with increased likelihood of taking up smoking or becoming a heavy drinker (p<0.05). This evidence suggests that impulsivity contributes to increasing health risk behaviours.     

Structural couplings between individual development and the epigenesis of family relations in schizophrenia: An eight-year follow-up

The aim of this research was to study individual development along with the epigenesis of family relations in an eight-year follow-up of schizophrenia. The five epigenetic phases described by Wynne are attachment/caregiving, communicating, joint problemsolving, mutuality, and intimacy. Results showed that the critical level of epigenesis was the communicating level; its resolution was statistically significantly connected to good prognosis concerning individual parameters. The mother-child dyad was usually epigenetically the most developed dyad in the family. We think this study gives a new paradigm for understanding connecting interconnections between individual and family dynamics in schizophrenia and valuable information for planning the integrated and need-specific treatment of schizophrenia and evaluating the course and prognosis of schizophrenia.This study was carried out at the Clinic of Psychiatry of the University of Turku, Finland, and financially supported by the Academy of Finland. The head of the project was Professor Yrjö O. Alanen. We have also been in cooperation with and received valuable constructive criticism from Professor Lyman C. Wynne, whose theoretical model we applied in this study. Ms. Birgitta Nolvi's secretarial work was greatly appreciated.