Sexual and reproductive health among primary and secondary school pupils in Mwanza, Tanzania: need for intervention

A cross-sectional questionnaire survey was conducted among 892 randomly selected pupils, aged 12 and above, attending 18 primary schools (PS) and five secondary schools (SS) in four communities of Mwanza Region in Tanzania. The goals were to assess the level of knowledge adolescents have about sexual and reproductive health (SRH), to assess the magnitude of SRH problems and to help design appropriate interventions. Median age of respondents was 15 years (range 12-20 years) and 14 years (range 12-19 years) for PS boys and girls, respectively, and 19 years (range 16-24 years) and 17 years (range 14-19 years) for SS boys and girls. Eighty per cent of PS boys and 68% of PS girls were already sexually active; the corresponding figures were 89% for SS boys and 48% for SS girls. Vaginal sex was the most common first sexual act reported by SS pupils, but 40% of PS pupils reported orogenital sex and 9% of PS pupils reported anal sex as their first sexual act. Almost half of PS girls have had sex with adults, including teachers and relatives. 'Forced sex' was reported by nearly half of PS and SS girls. Fourteen per cent of PS girls had already been pregnant, and over half of these pregnancies ended in illegally induced abortions. Despite a rather high (30%) lifetime rate of condom use, 33% and 25% of PS boys and girls, respectively, reported past experience of sexually transmitted diseases (STDs). STD rates were lower among SS pupils who had a better knowledge of STDs/HIV and fertility issues and reported higher condom use. The survey demonstrated the great vulnerability of school-going adolescents of Mwanza Region to consequences of sexual intercourse. The response should urgently come in the from of comprehensive adolescent SRH programmes.     

Parenting practices as predictors of substance use, delinquency, and aggression among urban minority youth: Moderating effects of family structure and gender.

This study examined how parenting factors were associated with adolescent problem behaviors among urban minority youth and to what extent these relationships were moderated by family structure and gender. 228 6th grade students reported how often they use alcohol, smoke cigarettes, or engage in aggressive or delinquent behaviors; a parent or guardian reported their monitoring and other parenting practices. Findings indicated that boys and those from single-parent families engaged in the highest rates of problem behavior. More parental monitoring was associated with less delinquency overall, as well as less drinking in boys only. Eating family dinners together was associated with less aggression overall, as well as less delinquency in youth from single-parent families and in girls. Unsupervised time at home alone was associated with more smoking for girls only. Implications for prevention interventions are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Age and sex differences in health habits and beliefs of schoolchildren.

Surveyed 1,981 boys and 1,952 girls in Grades 3–12 about health habits and beliefs, including smoking and eating habits, perceptions of exercise, weight, and parental involvement in health. Factors that emerged were smoking habits, family discussion of health, family thinking about health, nutritional habits, and health locus of control. Girls generally reported healthier food habits than did boys. However, adolescent girls reported more cigarette smoking than did adolescent boys. Also, boys consistently reported higher levels of exercise. There were also changes in habits and belief with age; trends that emerged in junior high school continued through high school. Adolescence also seems to be a transitional time for health habits, as suggested by personal experimentation and individual variation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Shifts of visual spatial attention modulate a steady-state visual evoked potential

An uncertain relation between health and angry/hostile behaviour exists in the literature on adolescents. With data from a pilot study, one possible reason for this is explored: health measures such as blood pressure as well as angry/hostile behaviours may change with, or depend upon physical maturity, body size and body fatness. The sample consists of 60 African-, Hispanic-, and Anglo-American adolescents (15 to 16 years of age) drawn from a public school in Houston, TX. Using resting diastolic blood pressure as a model, in a sex stratified analysis, the following conclusions were reached: Physical maturity in girls and body height in boys were related to ethnicity in the sample and were confounders of the blood pressure and anger relationship. In girls secretive anger ('anger-in') and hostility were associated with increased body fat; expressive anger ('anger-out') in boys is associated with increased conicity (central body fat distribution) (p < 0.01). These associations were independent of height and physical maturity. Hostility was not significantly related to diastolic blood pressure in boys after adjusting for height and conicity. 'Anger-in' was significantly and positively related to diastolic blood pressure in girls (p < 0.01). This relationship was strongly mediated by per cent body fat, because the association of 'anger-in' and blood pressure was no longer statistically significant when the model included body fat. The results suggest that measures of physical maturity and more refined measures of body fat and body fat distribution should be considered in studies attempting to link adolescent blood pressure with anger expression.     

Gender differences in solution of algebraic word problems containing irrelevant information.

In the 1st experiment, 219 boys and 217 girls in 10th grade classified algebraic word problems in terms of whether the problems contained missing, sufficient, or irrelevant information for solution. Among students with similar levels of general mathematical ability, girls were less likely than boys to identify missing or irrelevant information within problems. More girls than boys perceived irrelevant information within the text of a problem as being necessary for solution. In the 2nd experiment, 11th-grade girls (n?=?234), who were as able as boys (n?=?287) to solve algebraic word problems containing sufficient information, had lower solution rates than did boys on problems containing irrelevant information. On the latter problems, the girls more often incorporated the irrelevant information into their attempted solution than did the boys. The results point to differences between boys and girls in knowledge of problem structure. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Ossification of the sesamoid bone at the base of the first finger in Czech boys and girls

Ossification of the sesamoid bone of the first finger was studied in left hand-and-wrist X-rays of 296 Czech boys and 272 girls 9 to 15 years old using data collected between 1962 and 1966. The logit and the YES or NO methods were used in treating the data. A sesamoid bone, clearly visible to the naked eye, was considered as positive and when it was not yet visible, as negative. The sesamoid bone was developed in 50 per cent of boys at the age of 13.6 years and in 50 per cent of girls at the age of 11.2 years. This stage preceded the age at onset of menarche in Czech girls by 1.9 years. Boys showed a greater variability (SD = 1.4) than girls (SD = 0.8). Both sexes with clearly visible (ossified) sesamoid bones in their first fingers showed to be, on the average, taller and heavier in comparison with the Czech standard and with those boys and girls of corresponding ages without the sesamoid bone. In contrast to the still continuing secular trend in stature in Czech youths, the age of menarche remained in the last cca 30 years unchanged. In view of the close link between bone age and onset of menarche which remained unchanged for the past 30 years, we may consider our finding as still applicable to present-day adolescents.     

Lifestyle factors fail to explain the variation in plasma leptin concentrations in women

The underlying causes of 35 children with primary congenital hypothyroidism at the Children's Hospital were studied. There were 21 girls and 14 boys. Serum T4 and TSH level, 24 hours 131I uptake, and technetium-99m thyroid scintigraphy were performed after discontinuation of synthetic thyroid hormone for 4-6 weeks. Athyrosis was the most common cause and accounted for forty-three per cent of the patients. Twenty per cent of the patients had thyroid hypoplasia. Ectopic thyroid was found in thirty-three per cent of the patients. Only a patient whose diagnosis was organification defect had slightly enlarged thyroid gland, high retention of 131I and positive perchlorate discharge test. Onset of symptoms before 9 months of age may be helpful for distinguishing between lingual thyroid and the others. Serum T4 level less than 2 micrograms/dL was observed to be more common in athyrosis and lingual thyroid groups than thyroid hypoplasia group.     

Substrate binding mutants of the higher plant ADP-glucose pyrophosphorylase

Relationships between perceived parental acceptance and adolescent self-competence were examined in 214 sixth- and seventh-grade students by both adolescent and parental gender. Results indicated that for boys, paternal but not maternal, acceptance significantly predicted self-competence, while the opposite pattern was found for girls. In addition, self-worth significantly predicted maternal and paternal acceptance for both boys and girls. The consistency of these findings with current models of human development is discussed, along with their implications for research.     

A longitudinal study of preschool children's (homo sapiens) sex segregation.

In this 2-year longitudinal study, we hypothesized that sex of the human child (Homo sapiens), differences in physical activity, and time of the year would interact to influence preschool children's sex segregation. We also hypothesized that activity would differentially relate to peer rejection for boys and girls. Consistent with the first hypothesis, high-activity girls started off as the most integrated group but became more segregated with time, whereas high-activity boys remained the most segregated group across the duration of the study. The second hypothesis was also supported: For girls only, activity was significantly related to peer rejection during Year 1 only, the time when high-activity girls also interacted frequently with boys. Results are discussed in terms of sexual selection theory and gender boundary violations. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Sex, temperament, and family context: How the interaction of early factors differentially predict adolescent alcohol use and are mediated by proximal adolescent factors.

Adolescent alcohol use is common and has serious immediate and long-term ramifications. While concurrent individual and context factors are robustly associated with adolescent alcohol use, the influence of early childhood factors, particularly in interaction with child sex, are less clear. Using a prospective community sample of 362 (190 girls), this study investigated sex differences in the joint influence of distal childhood and proximal adolescent factors on Grade 10 alcohol use. All risk factors and two-way early individual-by-context interactions, and interactions of each of these with child sex, were entered into the initial regression. Significant sex interactions prompted the use of separate models for girls and boys. In addition to the identification of early (family socioeconomic status, authoritative parenting style) and proximal adolescent (mental health symptoms, deviant friends) risk factors for both girls and boys, results highlighted important sex differences. In particular, girls with higher alcohol consumption at Grade 10 were distinguished by the interaction of early temperamental disinhibition and exposure to parental stress; boys with higher alcohol consumption at Grade 10 were distinguished primarily by early temperamental negative affect. Results have implications for the timing and type of interventions offered to adolescents. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Clinical epidemiology of childhood abdominal migraine in an urban general practice

The present study examined the epidemiology of abdominal migraine among 1104 children registered with a general practice. There was a similar prevalence of recurrent abdominal pain as in other studies (8.4 per cent). The prevalence of headache was higher among children with recurrent abdominal pain and significantly so among girls. Migrainous headache was not significantly more prevalent in children with recurrent abdominal pain. The prevalence of abdominal migraine with and without migrainous headache was 0.7 and 1.7 per cent, respectively. The peak prevalence of abdominal migraine without migrainous headache was between five and seven years for both sexes. When associated with migrainous headache, it peaked at five to seven years in girls and seven to nine years in boys. The syndrome was associated with travel sickness and was more common among girls and those with a maternal history of migraine. Many children were photo- and phonophobic during an attack.     

Différences entre adolescents et adolescentes à quatre taches de visualisation spatiale.

Compared the performance of 64 adolescent boys and 42 adolescent girls (aged 15–17 yrs) on 4 visual-spatial skills tasks. The administrative conditions of these computerized tasks are highly standardized. Three of these tasks, Spatial Visualization, Perception and Spatial Relations, are taken from the Computerized Aptitude Test for adolescents and adults, whereas the 4th task is an adaptation for adolescents of the Puzzle subtest of the Computerized Aptitude Test for infants. The dependent variables are the average success scores and the speed of execution scores derived from latency times in a group of the best scores for each of the 4 tasks. The results show that the adolescent boys are more successful at the Spatial Visualization and Spatial Relations tasks. On the whole, the boys and the girls showed a comparable speed of success, except in the Spatial Relations subtest, where the girls were much faster. The observed differences are interpreted as reflecting the better strategies adopted by the boys to solve mental rotation tasks. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Aggression in adolescent girls: Implications for policy, prevention, and treatment.

This review of literature focuses on aggression and adolescent girls. Official crime statistics from Statistics Canada show an increase in violent offenses by girls. This statistic has created considerable interest in a heretofore largely ignored area of childhood maladjustment. Differences regarding the development and expression of aggression with girls in contrast to boys is provided. The authors argue that, in the context of what is acknowledged to be a limited literature, there are important themes for human service-providers and policy-makers to consider in examining assessment, treatment, and prevention strategies for aggressive adolescent girls. Finally, an orientation towards furthering a research agenda in the area of aggression with adolescent girls is provided. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Time orientation in male and female juvenile delinquents.

"This paper represents an attempt to relate findings obtained from three independent studies. Using a story completion technique to assess time orientation in imaginal processes, no difference was found between adolescent delinquent boys and adolescent delinquent girls. The measures of time orientation… were practically identical with findings… in a previous study of adolescent delinquent boys. Moreover, time orientation in the… delinquents was very similar to time orientation evidenced by much younger emotionally disturbed boys and normal boys." The delinquent children were found to be more present-oriented than nondelinquent adolescent boys. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Youth suicide in Norway, 1990-1992: a comparison between children and adolescents completing suicide and age- and gender-matched controls

In Norway 1990-1992, the suicide rate was 18.6 per 100,000 individuals per year for boys 15-19 years old and 6.3 for girls, and for 10-14 year olds the rate was 2.7 for boys and 0.5 for girls. Comparison of all completed suicides (N = 129) with gender- and age-matched control subjects identified depression (OR = 19.9; CI = 11.2, 35.5), disruptive disorders (OR = 6.0; CI = 3.1, 11.4), and previous suicidal behavior (OR = 3.4, CI = 2.0, 5.6) as main risk factors. Of the suicide completers, 74% had mental disorders. Suicidal intent was previously expressed by 48%, but few (24%) had received treatment, despite well-developed health services. A history of disruptive disorders (17%) and substance abuse (10%) were less frequently found than in previous studies, but binge drinking may contribute to the adolescent suicide rate.     

Physical aggression toward boys and girls in families characterized by the battering of women.

Forty-eight families (mothers and children) participated in a study on physical aggression toward boys and girls in households characterized by the battering of women. In each family, the mother had sought shelter because of relationship violence and had a son and daughter between 4 and 14 years. Mothers completed measures of physical marital violence directed at themselves, aggression toward children, and children's externalizing behavior problems. Older children completed measures of aggression directed at themselves. Results indicated that child gender moderates the relationship between the battering of women and aggression toward children. In families characterized by "more extreme" battering, boys were more often victims of aggression than girls, boys exhibited more externalizing problems than girls, and gender differences in externalizing problems helped account for the differential aggression directed at boys and girls. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Instrumentality as a life-stress moderator for early versus middle adolescents.

Used a longitudinal design to test the main and stress-buffering effects of instrumentality on measures of trait anxiety, depression, and self-esteem. Ss were early (junior high school) and middle (senior high school) adolescent boys and girls. The hypothesis that instrumentality would be negatively related to psychological distress was supported by the cross-sectional and longitudinal regression analyses of every subgroup of Ss. The hypothesized stress-buffering effect of instrumentality was found in the cross-sectional and longitudinal analyses of senior high girls, specifically in the context of interpersonal negative events (relationship stress). The analyses for junior high girls revealed that instrumentality was beneficial only at a low level of relationship stress. There were no significant interaction effects in the regression analyses of boys. The findings suggest that, when experiencing relationship stress, instrumentality is helpful for middle adolescent girls but not for early adolescent girls. Therefore, future research on adolescents' life-stress adjustment should consider the roles of gender, age, personality, and type of life stress. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Blood pressure, lipids, lipoproteins, body fat and physical activity of Singapore children

OBJECTIVE: To determine body composition, coronary risk factors and physical activity and the inter-relationships of these variables in Singaporean school children. METHODOLOGY: This study examined 1681 children (784 boys and 897 girls) from eight primary and seven secondary schools to determine percentiles for body stature and composition, blood pressure, lipids/lipoproteins and blood glucose by gender for three age divisions. An exercise and leisure pursuit questionnaire was administered to ascertain self-reported physical activity patterns. Anthropometric data and blood pressure readings were taken. Capillary blood was drawn from each child via finger prick sampling following an overnight fast. The concentrations of total cholesterol (TCHOL), triglyceride (TG), high-density lipoprotein cholesterol (HDL-C) and glucose (GLU) were determined from plasma using a dry chemistry analyser. Low-density lipoprotein cholesterol (LDL-C), very low-density lipoprotein cholesterol (VLDL) and the TCHOL/HDL-C ratio were determined by calculation. RESULTS: While 47.7% of boys and 22.0% of girls disclosed active lifestyles, differences between the active and non-active children were found in coronary risk factors TCHOL, LDL-C, TG, TCHOL/HDL-C and per cent body fat. No differences were shown between the two groups in HDL-C, GLU and blood pressure. There was a high correlation between the various measures of body composition with the highest correlation (r = 0.806, P < 0.001) found between body mass index (BMI) and waist measurements. CONCLUSIONS: Children in this study who reported no activity or relatively little activity were found to have TCHOL, LDL-C, TG, TCHOL/HDL-C and per cent body fat that were higher than those who reported moderately high or vigorous physical activity patterns.     

Impact of puberty on family relations: Effects of pubertal status and pubertal timing.

This investigation examines the impact of pubertal status and pubertal timing, independent of each other and of chronological age, on the family relationships of adolescent boys and girls. The sample is composed of 204 families with a firstborn child between the ages of 10 and 15. Measures included adolescent and parental reports of closeness, conflict, and autonomy as well as assessments of each adolescent's pubertal status and pubertal timing (early, on time, or late maturing). Findings indicate that (a) pubertal maturation is associated with increased emotional distance between youngsters and their parents; (b) pubertal maturation (among girls) and early pubertal maturation (among boys) increase conflict between adolescents and their mothers, but not necessarily fathers; and (c) pubertal maturation, and especially late maturation, may be accompanied by increased behavioral autonomy for the adolescent. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

To achieve or not to achieve: A self-regulation perspective on adolescents' academic decision making.

In 2 studies, the authors investigated the utility of the self-regulation model of decision making for explaining and predicting adolescents' academic decision making. Participants were mostly 9th and 11th graders. The 1st study consisted of all boys, and a 2nd similar study consisted of boys and girls. Measures included a newly developed assessment of decision-making skill (the Decision-Making-Competency Inventory), select scales of the Learning and Study Strategies Inventory-High School Version, an assessment of the importance of academic goals, and teacher ratings of achievement behavior. Adolescents' valuing of academic goals and their decision-making competency were typically the best predictors of their achievement behavior. Older adolescent boys did not affirm achievement striving compared with younger adolescent boys and older adolescent girls. (PsycINFO Database Record (c) 2010 APA, all rights reserved)