Biomedical subjects

Katri Räikkönen

Publications and source records attributed to Katri Räikkönen.

15 recordsLinked to original sources

PubMed2006

Tryptophan hydroxylase 1 gene (TPH1) moderates the influence of social support on depressive symptoms in adults.

BACKGROUND: Tryptophan hydroxylases (TPHs) are involved in the biosynthesis of serotonin and are therefore candidate genes for psychiatric disorders, including depression. We examined whether the common 218 A > C and 779 A > C polymorphisms in the tryptophan hydroxylase 1 gene (TPH1) moderated the association between perceived social support and sub-clinical depressive symptoms in adults. METHODS: The subjects were a randomly selected subsample (n=341) of individuals participating in the Cardiovascular Risk in Young Finns study, who had data on social support on one assessment time and depressive symptoms on two assessment times. Social support was assessed on the Perceived Social Support Scale Revised (PSSS-R) and depressive symptoms on a modified version of the Beck's Depression Inventory (BDI). RESULTS: We found that low social support predicted depressive symptoms more strongly in individuals carrying A alleles of the TPH1 than in others. The interaction effect was observed in a cross-sectional analysis and when predicting depressive symptoms over a four-year period. LIMITATIONS: We did not have data on TPH2, which has recently been identified as the primary TPH isomorphism affecting serotonin synthesis in the brain. CONCLUSIONS: TPH1 gene may be involved in the development of depressive symptoms by moderating the impact of depressogenic social influences.

Adult↗

PubMed2006

Continuity of temperament from infancy to middle childhood.

Continuity of temperament from 6 months (the IBQ) to 5.5 years (the CBQ) was explored in Finnish children (n=231) within the theoretical framework deviced by Rothbart. Activity level, smiling and laughter, distress to limitations and fear showed significant differential homotypic and heterotypic continuity, while soothability and duration of orienting showed significant differential heterotypic continuity. On the level of latent superconstructs, infant positive and negative affectivity accounted for 4.6, 22.3, and 6.0% of the variance in childhood extraversion, effortful control and negative affectivity, respectively. Infant and childhood temperament clustered into profile types named "resilient", "undercontrolled", and "overcontrolled" mirroring ipsative continuity. These findings give empirical credence to Rothbart's theory by replicating and extending previous findings in significant ways.

Child, Preschool↗

PubMed2006

Fetal programming of temperamental negative affectivity among children born healthy at term.

The fetal programming hypothesis suggests that an adverse in utero environment, reflected in small body size at birth, has life-long effects on different physiological systems that may affect both health and behavior. We explored whether fetal growth was associated with biologically based temperamental outcomes (negative affectivity scales, the CBQ) among 5(1/2)-year-old children (n = 416) born healthy at term (gestational weeks 37-42). In line with the hypotheses, small body size at birth (thinness measured by ponderal index, kg/m(3)) was related to increased negative affectivity and its subscales: anger-, discomfort-, and sadness-proneness in childhood. Longer length at birth was predictive of higher levels of child anger- and sadness-proneness. Length of gestation moderated the associations of weight and length at birth with negative affectivity. The results suggest that the biological basis of temperament may be subjected to antenatal environmental influences, and that the mechanisms, proposed to be related to fetal glucocorticoid environment, may operate even within the normal range of term birth.

Affect↗

PubMed2006

Depressive vulnerability in parents and their 5-year-old child's temperament: a family system perspective.

The actor-partner interdependence model was used to test whether one parent's depressive vulnerability (self-criticism and dependency) was associated with the same parent's own (an intraparental association) and the other parent's (a cross-parental association) ratings of their 5-year-old child's temperament (536 parents, 268 dyads). The more vulnerable the parents were, the more the children showed negative affectivity and lack of effortful control. Significant interactions with the parent's gender and between the spouses' depressive vulnerabilities were found, highlighting the fact that child outcomes are dependent on family processes. All associations were independent of maternal and paternal depressive symptoms. The influence of personality-based depressive traits on child temperamental outcomes and effective parenting is discussed with reference to between-dyad family dynamics.

Child of Impaired Parents↗

PubMed2006

Socioeconomic status in childhood and adulthood: associations with dispositional optimism and pessimism over a 21-year follow-up.

We examined whether dispositional optimism and pessimism (overall LOT-R and optimism and pessimism component scores) of 694 adults aged 24 and 27 were associated with socioeconomic status (SES) measured concurrently and in childhood at ages 3 and 6. SES measures included education, occupational status and unemployment, and income. Concurrent adulthood SES was associated with the overall LOT-R and optimism and the pessimism component scores. Childhood family SES predicted overall LOT-R and pessimism component scores, even after controlling statistically for the adulthood SES. Social mobility between SES of family of origin and current SES also influenced the scores. The current findings suggest that the foundation of dispositional optimism and pessimism is related to early SES of the family.

Adult↗

PubMed2005

Do gestational age and weight for gestational age predict concordance in parental perceptions of infant temperament?

OBJECTIVE: To study whether infant weight for gestational age, and gestational age predict mother- and father-rated infant temperament (IBQ) at 6 months. METHODS: The sample comprised of family units with both biological parents and infants born at term (n = 152). Data on weight and gestational age were collected form obstetric database. RESULTS: Infants born small for gestational age (SGA) (weight < 10th percentile for gestational age) were rated by both parents as significantly more fearful and negatively reactive compared to infants born appropriate for gestational age (AGA). Infants born SGA defined by using the lowest 15th or 20th percentile groups did not differ from AGA group in temperament. The weekly continuum of gestational age predicted differences in parental ratings of infant temperamental attentiveness. CONCLUSIONS: The predictive significance of infant weight for gestational age and gestational age for behavioral outcomes appear true also for infants born at term. Concordance in parental perceptions of an infant born SGA emphasizes the clinical significance of the findings.

Adult↗

PubMed2005

Novelty seeking: interaction between parental alcohol use and dopamine D4 receptor gene exon III polymorphism over 17 years.

Recent meta-analyses have questioned the association between the dopamine receptor D4 (DRD4) gene polymorphism and the temperament trait of novelty seeking, and proposed an interaction between the polymorphism and other factors. We wanted to test whether parental alcohol use during childhood moderated the effect of an offspring dopamine receptor gene (DRD4) polymorphism on the temperament trait of novelty seeking in adulthood. A population-based sample of children and adolescents (n=2149) and their parents was examined in 1980 and 1983 on parental alcohol use and rearing practices. In 1997, study participants completed the Temperament and Character Inventory for the novelty-seeking temperament trait, and a subsample (n=150) was genotyped for the DRD4 exon III polymorphism. For the participants with the father, but not the mother, reporting more frequent alcohol consumption or drunkenness in examinations 17 and/or 14 years before the novelty-seeking assessment, an association between the short (two- or five-repeat) alleles of the DRD4 gene and extremely high novelty-seeking scores was observed. When the father reported less frequent alcohol consumption or drunkenness, the genotype was not associated with novelty seeking. The association remained after controlling for sex, age, and maternal child-rearing. These results provide preliminary information on gene-environment interaction on the temperament trait of novelty seeking and may partly explain the heterogeneity of findings concerning the association between DRD4 polymorphisms and novelty seeking.

Alcoholic Intoxication↗

PubMed2004

Sweet babies: chocolate consumption during pregnancy and infant temperament at six months.

BACKGROUND: Chocolate contains several biologically active components potentially having behavioral and psychological consequences. AIMS: We tested whether chocolate consumption and stress experiences during pregnancy predict mother-rated infant temperament at 6 months. DESIGN AND SUBJECTS: Prenatal frequency of chocolate consumption and intensity of psychological stress experience of the mothers, and temperament characteristics of the infants 6 months postpartum were evaluated in 305 consecutive, healthy mother-infant dyads. RESULTS: Mothers who reported daily consumption of chocolate rated more positively the temperament of their infants at 6 months. Maternal prenatal stress predicted more negatively tuned ratings of the infant temperament, particularly among those who reported never/seldom chocolate consumption. However, this effect was not observed among the mothers reporting weekly or daily chocolate consumption. CONCLUSIONS: In addition to producing subjective feelings of psychological well being, chocolate may have effects at multiple environmental and psychological levels.

Adult↗

PubMed2004

Does nondipping of blood pressure at night reflect a trait of blunted cardiovascular responses to daily activities?

BACKGROUND: Individuals who fail to show a decline in blood pressure (BP) when asleep or at night (labeled nocturnal nondippers) are at elevated risk for hypertension and associated target-organ damage. PURPOSE: We tested whether the well-established changes in BP exhibited in response to daily activities are also blunted in nocturnal nondippers. METHODS: Cross-sectional study of 41 women and 56 men, aged 27 to 71 years, residing in Benin, Nigeria, enrolled in a health survey of civil servants. Ambulatory 24-hr BP monitoring was performed with concurrent diary recordings of physical activity level, posture, location, state of mental activity, interpersonal interaction, and mood obtained during the waking hours. RESULTS: Nocturnal nondippers exhibited smaller cardiovascular responses to changes in posture (from lying to sitting or to standing, ps <.02), location (from home to work or to driving/riding in a car, ps <.02), mental activity (from relaxed to active, p =.02), and mood (from feeling mellow to feeling elated-happy, p =.05) than did dippers. Statistical controls for posture substantially reduced the effects of nondipping status on responses to other daily activities and mood. Lack of systolic BP responsiveness to postural changes during the day is a strong predictor of nondipping status. CONCLUSIONS: Nondipping at night appears to extend to decreased cardiovascular responses to changes in activities during daytime hours.

Activities of Daily Living↗

PubMed2003

Test-retest reliability of auditory ERP components in healthy 6-year-old children.

One prerequisite of using auditory event-related brain potentials (ERP) in developmental and clinical research is to determine their reliability. We examined the individual stability and test-retest reliability of the ERP responses elicited by repetitive, slightly deviant, and novel sounds over 3 months in healthy 6-year-old children. When broken down to 20 ms intervals, the standard-stimulus ERP responses shared > 77%, the deviant-stimulus responses 17-31%, and the novel-stimulus responses > 33% of the individual variation over the two testing sessions; the mean amplitude differences (novel/deviant-standard) did not change significantly between sessions. The sufficiently high individual stability of the ERP responses support the utility of these measurements for studying the effects of novel sounds in this age group.

Acoustic Stimulation↗

PubMed2003

Hostility predicts metabolic syndrome risk factors in children and adolescents.

The authors tested in 134 African American and European American children whether hostility measured at study entry predicted the metabolic syndrome risk factors an average of 3 years later. Hostility was measured with the Cook-Medley Hostility Scale (W. W. Cook & D. M. Medley, 1954) and with ratings of Potential for Hostility from interview responses. Metabolic syndrome was based on having at least 2 of the following risk factors above the 75th percentile of scores for their age, race, and gender group: body mass index, insulin resistance index, ratio of triglycerides to high-density lipoprotein cholesterol, and mean arterial blood pressure. Children who exhibited high hostility scores at baseline were likely to exhibit the metabolic syndrome at the follow-up. The results highlight the potential importance of early prevention and intervention of behavioral risk factors for cardiovascular disease.

Adolescent↗

PubMed2003

It is never too late: change in physical activity fosters change in cardiovascular risk factors in middle-aged women.

The purpose of the study was to determine the effect of physical activity, particularly change in physical activity over time, on cardiovascular risk factors in women. The 520 women in this analysis are part of an ongoing epidemiologic investigation of the effects of menopause on risk for cardiovascular disease; the investigation spans almost 20 years. The findings show that on average, physically active women have healthier risk factor profiles over time, and that as women change their activity level, their risk factor profiles change as well. Thus, for middle-aged women going through the menopausal transition, it is never too late to reduce their cardiovascular risk by increasing their activity level.

Adult↗

PubMed2003

Maternal perceptions and adolescent self-esteem: a six-year longitudinal study.

A six-year longitudinal study investigated the development of self-esteem in relation to mother's child-rearing attitudes, role satisfaction, and perceived temperament of the child. Participants were two age cohorts of girls and boys from the Cardiovascular Risk in Young Finns study, being 6 (n = 416) and 9 years old (n = 408) at the beginning of the study (baseline). Scores regarding mother's hostile child-rearing attitudes, mother's low role satisfaction, and maternal perceptions of child's difficult temperament (high activity, negative emotionality, and low cooperativeness) were obtained at baseline and three years later. Self-esteem was measured by self-reports six years later, at the ages of 12 and 15. The results indicated considerable gender differences. Among girls nearly all childhood variables individually predicted self-esteem, whereas among boys the associations were less evident. Additionally, perceived difficult temperament at baseline predicted hostile child-rearing attitudes at first follow-up, which further predicted low self-esteem among girls only.

Adolescent↗

PubMed2002

The relationship between psychological risk attributes and the metabolic syndrome in healthy women: antecedent or consequence?

The metabolic syndrome is an important risk factor for major chronic diseases in women. A key component of the syndrome, central adiposity, is correlated with psychological risk factors associated with coronary artery disease in prior epidemiological studies. We evaluated if psychological risk factors predicted the metabolic syndrome and if the metabolic syndrome predicted psychological distress. A population-based cohort of 425 women who were middle-aged, and pre-, peri-, and postmenopausal was followed for an average 7.4 years. Psychological risk factors, including depression, anxiety, tension, current perceived stress, and anger, and biological components of the metabolic syndrome, including glucose, triglycerides, high-density lipoprotein (HDL)-cholesterol, waist circumference, and blood pressure (BP) were measured at baseline and at examinations 1 to 8 years postmenopause. Women were classified according to the National Heart, Lung, and Blood Institute (NHLBI) criteria for metabolic syndrome. Women who exhibited high levels of depression, tension, and anger at baseline, and increased in anger during the follow-up had elevated risk for developing the metabolic syndrome during follow-up, P <.04. The metabolic syndrome at baseline, in turn, predicted increasing anger and anxiety 7.4 years later, P <.001. Psychological risk factors affect the development of the metabolic syndrome. The association between anger and the metabolic syndrome is reciprocal. Reduction in the level of psychological distress may prevent the development of the metabolic syndrome in women.

Adult↗

PubMedDate not supplied

Optimistic attitudes protect against progression of carotid atherosclerosis in healthy middle-aged women.

OBJECTIVE: Optimistic people report a higher quality of life, engage in more active coping and adopt more health-promoting behaviors than people low in optimism, ie, pessimism. We evaluated whether pessimists are more likely to show progression in carotid disease than optimists. METHODS: A total of 209 middle-aged healthy premenopausal women enrolled in an epidemiological study of cardiovascular risk factors and had carotid scans 10.4 years and 13.5 years later when they were at least 5 years postmenopausal. Women completed the Life Orientation Test (LOT), a measure of pessimistic and optimistic attitudes, at study entry and at the time of the first carotid scan. Analyses evaluated the association of LOT scores and change in carotid intima medial thickness (IMT) across 3 years. RESULTS: Multiple linear regression analyses showed that the higher the pessimism scores at study entry, the greater the increase in mean IMT (beta = 0.17, p <.007). A comparison of those in the lowest quartile of LOT scores (most optimistic) with those in the other three quartiles showed that the most optimistic group had less progression than the remaining more pessimistic women (mean percent increase = 1.3 and 6.0 for mean IMT, F = 15.4, p <.001). Women who were chronically optimistic at study entry and at the first carotid scan (bottom quartiles at both times) had less progression in mean IMT than did those who were chronically pessimistic (top quartiles at both times). CONCLUSIONS: Optimistic women are less likely to show progression of carotid disease in mid-life than are pessimists.

Age Factors↗