Different Age Groups Of Males Research Articles

Global, regional, and national burdens of cancer in children aged zero to nine years from 1990 to 2019.

The description of long-term trends in the cancer burden among children aged zero to nine years from 1990 to 2019 reveals significant changes in children's health. It helps in resource allocation and health policy planning. We analysed data on the incidence, mortality, and disability-adjusted life years (DALYs) by sex and age group in children aged zero to nine. Estimates of DALYs for children aged zero to nine years, appeared as part of the Global Burden of Diseases, Injuries, and Risk Factor Study 2019, by age, sex, and location for 1990-2019. We also provided estimations by the sociodemographic index (SDI) quintile, a systematic measure to indicate educational attainment, income per capita, and total fertility rate for those younger than 25 years. We used age-period-cohort models to investigate paediatric cancers prevalence, incidence, mortality, and DALYs rates and auto-regressive integrated moving average models to predict cancer in children of different age groups in males and females. A total of 6 224 010 DALY numbers for cancer cases occurred globally in 2019 among children aged zero to nine years. Additionally, the incidence of paediatric cancers in 2019 in the middle SDI countries was the highest, including 60 662 cases, and the highest mortality and DALYs cases of paediatric cancers were in the low SDI countries (25 502 and 2 199 790). The joinpoint regression analysis revealed that the trend of total cancer burden in age-standardised mortality rates and age-standardised DALYs rates showed a significant decrease with an average annual percentage change of -2.10 and -2.03 from 1990 to 2019. Furthermore, the paediatric cancer spectrum was changing. Other malignant neoplasms and other leukaemia were the major components of cancer in all age groups of children. The disease burden in children aged zero to nine years decreased significantly globally from 1990 to 2019. However, the overall prediction of childhood cancer increased slightly from 2020 to 2040. Our findings may help guide investments and inform policies. This highlights the necessity to improve current treatment measures and establish effective prevention strategies to reduce the cancer burden among children aged zero to nine years.

Echocardiographic two-dimensional strain evaluation of right ventricular function in healthy adults

Objective: To explore the feasibility of using two-dimensional speckle tracking echocardiography for measuring right ventricular strain and function in healthy adults, and to analyze the impact of age and gender. Methods: This study is a cross-sectional study. Healthy adults who underwent physical examination in the Physical Examination Center of Beijing Hospital from January 1, 2020 to January 1, 2021 were included. Two researchers independently measured various right ventricular longitudinal strain indices using the Echopac software, including (global longitudinal strain (GLS), apical longitudinal strain (ALS), midventricle longitudinal strain (MLS), basal longitudinal strain (BLS), free wall GLS (FWGLS), free wall ALS (FWALS), free wall MLS (FWMLS) and free wall BLS (FWBLS)) as well as tricuspid annular plane systolic excursion (TAPSE) and right ventricle-fraction of area change (RVFAC). The above indicators were taken as the average of two physicians. The consistency of the measurements by two physicians was evaluated by the within-group correlation coefficient (ICC). Results: A total of 233 subjects were included, including 137 males, aged (58.5±14.2) years. ICC values was all above 0.8 with excellent agreement. The values of FWGLS and GLS in healthy adults were -26.63% and -21.89%, respectively. There was no statistically significant difference in TAPSE ((2.06±0.41)cm vs. (2.10±0.39)cm, P=0.510) and RVFAC ((51.17±9.91)% vs. (50.89±8.65)%, P=0.826) between males and females. The values of various right ventricular long axis strain indicators (GLS, ALS, MLS, BLS, FWGLS, FWMLS, FWMLS, FWBLS) in females aged 18 to 40 and 41 to 65 years were higher than those in males of the same age (all P<0.05), while there was no statistically significant difference in the values of various right ventricular long axis strain indicators between the sexes in subjects aged 65 years and above (all P>0.05). In females, the right ventricular GLS, ALS, MLS, FWGLS, FWALS, FWMLS, and FWBLS values in the groups aged 18 to 40 and 41 to 65 years were significantly higher than those in the group aged 65 years and above (all P<0.05). In contrast, no significant differences were found in these indices among different age groups in males (all P>0.05). Conclusions: Using two-dimensional speckle tracking technology in echocardiography to measure right ventricular strain indicators is feasible and highly reproducible. Gender and age have an impact on right ventricular strain indicators.

Reference intervals of biochemical analytes in healthy adults from northern China: A population-based cross-sectional study.

Reference intervals (RIs) of laboratory testing play a fundamental role in medical activities. RIs vary greatly for populations in different areas This study aimed to evaluate the age- and sex-specific reference intervals for a healthy population in a typical city of northern China. A cross-sectional study was performed in 4 tertiary care centers of Shijiazhuang of China, biochemical analytes were analyzed using a Beckman Coulter AU5800 (Beckman Coulter Inc., Brea, CA). A total of 42,979 healthy individuals were involved in this study. Grouped by age- and sex-specific, reference intervals of all the measures have been established. We found that different age groups of males and females have significant differences (all P < .001) in levels of various biochemical analytes. We provided a comprehensive age- and sex-specific RIs for biochemical analytes, which showed dynamic changes with both age and sex. For the local population, the reference intervals established here can be adopted in other clinical laboratories after appropriate validation.

Cytomorphometry of Normal Exfoliated Gingival Cells: An Analytical Study

Introduction: Gingiva is lined by stratified squamous epithelium. One of the most common types of carcinoma in the world is oral cancer. Gingival cancers are a common type of oral neoplasm. In order to compare normal tissue with pathological smears using exfoliative oral cytology with morphometry, a baseline must be established. A study was conducted to obtain nuclear area (NA), cytoplasmic area (CA), and N:C ratio-nuclear: Cytoplasmic ratio of exfoliated normal gingival cells and to correlate it with healthy individuals by their age and gender. Methodology: Exfoliated gingival squamous cell smears were obtained from 200 subjects (100 males, 100 females) belonging to age groups &lt;20 years, 21–40 years, 41–60 years, and &gt;60 years. Smears were fixed and stained by routine Hematoxylin and Eosin staining procedure. With the use of both ocular micrometer and stage micrometer different cellular parameters were measured. Student’s t-test was used for statistical analysis. Results: There were significant differences in NA, CA, and N:C ratio with age regardless of gender. Different age groups of males showed significant variations (P &lt; 0.0001) in all the above parameters. The same was true for different age groups of females. In terms of NA, CA, and N:C ratio, the difference between both genders was significant regardless of age. Conclusion: Gingival smears showed age and sex-linked changes in NA, CA, and nuclear: Cytoplasmic ratio. It might serve as a standard for these variables when comparing similar measurements based on pathologic smears of malignant or premalignant nature.

Effect of Aging on Platelets in the Individuals of 30 to 60 Years Age Group – A Cross Sectional Study

BACKGROUND&#x0D; In this study, we wanted to evaluate to find the significant changes in count of platelets which are one of the blood components with advancing age both in males and females of 30 - 60 years’ age group, to study and analyze the count of platelets in three different age groups of males, to study and analyze the count of platelets in three different age groups of females, to compare the count of platelets in between males and females in different age groups.&#x0D; METHODS&#x0D; This was a hospital based analytical observational cross-sectional study conducted among patients in the 30-60 years’ age group in the Department of Physiology in collaboration with Department of Pathology and Department of General Medicine at Government Medical College, Srikakulam, Andhra Pradesh, India, after obtaining clearance from institutional ethics committee and written informed consent from the study participants.&#x0D; RESULTS&#x0D; Platelet count decreased with increase in age in males from 31-40 years’ age group to 41-50 years’ age group, and count slightly increased with increase in age from 41-50 years’ age group to 51-60 years’ age group in males. But in female’s platelet count increased with increase in age.&#x0D; CONCLUSIONS&#x0D; The present study was done in limited specific age groups that is in between 30-60 years. Further large studies should be done in large population different age groups to know the cause of age specific variations in platelets.

Oxidized LDL and Risk of Coronary Heart Disease

Oxidized LDL cholesterol (ox-LDL) is considered to be a key factor of initiating and accelerating coronary heart disease CHD and diabetes Mellitus DM , is associated with several mechanisms one of them Oxidative stress. The aim of this study was to find the association between ox- LDL ,HDL-C , TG , LDL-C and arylesterase , with CHD risk in different age groups in males and females , the difference in these risk factors can explain the sex difference and how much the changes in the risk factors levels in CHD and CHD with DM patients between age groups.&#x0D; Methods: determination biochemical parameters of serum blood of ox-LDL , TG , TC , HDL-c , LDL-c , S. Glucose and arylesterase activity were measured in cases male and females were carried CHD and CHD with DM .The cases divided in different the age groups (40-49) , (50-59) and (60-69) years and compered the result with control groups .&#x0D; Results: mean Value of ox-LDL and oxidation ratio of LDL show significantly higher at (p&lt;0.05) in CHD and (p&lt;0.001) in CHD with DM patient for females in the age group (40-49) years but in the males show the results significant decrease and different significant in others groups ,beside to effect Sex and age some the studied biochemistry parameters levels and signification decrease in HDL-C and arylesterase levels as antioxidant enzymes in females and male patient selected compared with control groups.

Comparison of Three Methods for Skeleton Age Estimation.

To find the appropriate method for age estimation for different ages and sexes. The costal cartilage, sternum and pubic symphysis of 91 unknowns from 2000 to 2020 from the Forensic Department of the Criminal Investigation Team of Shanghai Public Security Bureau were collected. Costal cartilage, sternal and pubic symphysis inferences were used to estimate the age, and the consistency between the estimated results and the actual physiological age of the unknowns was tested. The accuracy of age estimation of different samples was compared, and the relationship between accuracy and age and sex was analyzed. Using the costal cartilage method, the inference errors of males, females and the whole population under 40 years old were (0.608±2.298) years, (0.429±1.867) years and (0.493±2.040) years, while those over 40 years old were (-1.707±3.770) years, (-3.286±4.078) years and (-2.625±4.029) years. The differences between different age groups in these three populations were statistically significant (P<0.05). Using the sternum method, the inference errors of males and females under the age of 40 were (0.921±3.019) years and (0.452±1.451) years, while those over the age of 40 were (-5.903±5.088) years and (-1.429±2.227) years. The differences between different age groups in males and females were statistically significant (P<0.05). Using the pubic symphysis method, the inference errors of males and females under 40 years old were (-0.204±1.876) years and (0.238±2.477) years, while those over 40 years old were (1.500±2.156) years and (-2.643±4.270) years. The differences between different age groups in males and females were statistically significant (P<0.05). Using the sternum method and pubic symphysis method for age estimation of over 40 years old, the difference between different sexes was statistically significant (P<0.05). All three methods of age estimation are stable and effective and more accurate for people under 40 years old. For age estimation of unknowns over 40 years old, the pubic symphysis method is preferred in males and the sternum method is preferred in females.

Sex- and age-specific associations between cardiometabolic risk and white matter brain age in the UK Biobank cohort.

Cardiometabolic risk (CMR) factors are associated with accelerated brain aging and increased risk for sex‐dimorphic illnesses such as Alzheimer's disease (AD). Yet, it is unknown how CMRs interact with sex and apolipoprotein E‐ϵ4 (APOE4), a known genetic risk factor for AD, to influence brain age across different life stages. Using age prediction based on multi‐shell diffusion‐weighted imaging data in 21,308 UK Biobank participants, we investigated whether associations between white matter Brain Age Gap (BAG) and body mass index (BMI), waist‐to‐hip ratio (WHR), body fat percentage (BF%), and APOE4 status varied (i) between males and females, (ii) according to age at menopause in females, and (iii) across different age groups in males and females. We report sex differences in associations between BAG and all three CMRs, with stronger positive associations among males compared to females. Independent of APOE4 status, higher BAG (older brain age relative to chronological age) was associated with greater BMI, WHR, and BF% in males, whereas in females, higher BAG was associated with greater WHR, but not BMI and BF%. These divergent associations were most prominent within the oldest group of females (66–81 years), where greater BF% was linked to lower BAG. Earlier menopause transition was associated with higher BAG, but no interactions were found with CMRs. In conclusion, the findings point to sex‐ and age‐specific associations between CMRs and brain age. Incorporating sex as a factor of interest in studies addressing CMR may promote sex‐specific precision medicine, consequently improving health care for both males and females.

Implication of coughing dynamics on safe social distancing in an indoor environment—A numerical perspective

Coughing is a primary symptomatic pathway of respiratory or air-borne disease transmission, including COVID-19. Several parameters such as cougher’s age, gender, and posture affect particle dispersion indoors. This study numerically investigates the transient cough evolution, contamination range, particle reach probability, and deposition fraction for different age groups of males and females in standing and sitting postures in a ventilated room. The efficacy of a cloth mask has also been studied with and without the influence of air ventilation. Validated Computational Fluid Dynamics methodology has been implemented to model complex physics such as turbulent buoyant cloud, particle–air interaction, particle collision/breakup, and droplet evaporation. Our results show that overall, the contamination range is slightly lower for females due to lower cough velocities and particle counts. Moreover, a significant fraction of particles crosses the two meters social distancing guideline threshold with an unhindered cough. Besides, wearing a cloth mask reduces the average contamination range by approximately two-third of the distance compared to coughing without the mask. However, aerosolized particles reach longer streamwise distances and drift for extended durations beyond thirty seconds. This study can be used to improve the heating, ventilation, and air conditioning recommendations and distancing guidelines in indoor settings.

Association of Subpubic Angle Measurement with Age and Gender in a Group of Adult Sudanese Patients

Background: The measurement of the subpubic angle (SPA) has been used for determining gender with a high degree of accuracy in various ethnic groups. This measurement can also be helpful in forensic and physical anthropology. The aim of this study was to compare the SPA in different adult age groups (males and females) and to use the SPA to estimate the demarking point (DP) for the determination of gender.&#x0D; Methods: This study included 158 subjects – 59 male and 99 female. The SPA was measured electronically using antero-posterior pelvis X-rays. Measurements were taken retrospectively using the Picture Archiving and Communication System. SPA measurements were compared between the male and female participants in different adult age groups. To determine the gender, the DP was calculated from the means of SPA in male and female participants. &#x0D; Results: A comparison of the means of SPA between males and females showed that females (134.94 ± 15.33º) had wider SPA than males (105.88 ± 10.33) with a significant difference (P = 0.012). While a DP &gt; 126.5 is most likely indicative of a female pelvis, a DP &lt; 104.3 is indicative of a male pelvis. The accuracy levels based on the measured DP of participants in this study were 45.8% and 69.7% for males and females, respectively. Besides, with regards to age, the mean values for different age groups in males and females were statistically insignificant (P-values were 0.21 and 0.75, respectively). &#x0D; Conclusions: According to the obtained results, the variations in the measurements of the SPA from pelvic X-rays can be used to determine gender. The calculated SPA range and DP were found to predict female gender with higher accuracy. Age was not associated with any notable differences in SPA measurements.&#x0D; Keywords: subpubic angle, pelvis, Sudanese, sex differences

The spectrum of cancer in adolescents and young adults (AYAs): An observational study in a single institution from 2015-2019.

e13629 Background: Cancer in adolescents and young adults (AYAOs) refers to patients diagnosed with a malignancy between 16 and 39 years old. This is thought to be 5% in the Western population. The exact incidence and distribution in Asia is uncertain although the WHO estimated 650 000 AYAs to be newly diagnosed in this part of the world in 2018. There is limited data on the incidence and epidemiology on AYAs in Asia, but it is known from the western literature that the distribution of cancer types, clinico-pathological features and outcomes in this population is very different. We therefore, sought to evaluate the pattern of cancer types among the different age groups of the AYA population seen in a high-volume single Asian tertiary cancer centre. Methods: We undertook a retrospective observational study of all patients diagnosed with cancer between 16 and 39 years old who presented to the National Cancer Centre Singapore (NCCS) from 1 January 2015 to 31 December 2019. Results: A total of 2583 cases was observed during the 5-year period. The male: female ratio was 1:1.75. The majority of the patients were between of 35-39 years (y) ( n= 1128, 44.0%). The most common cancer across the different age groups in females were sarcoma (16-19 y), hematologic malignancies (20-24 y) and breast cancer (25-29 y, 30-34 y and 35-39 y). The most common cancer across the different age groups in males were hematologic malignancies (16-19 y), germ cell tumours (20-24 y), germ cell tumours, hematologic malignancies and sarcoma (25-29 y), hematologic malignancies (30-34 y) and colorectal cancers (35-39 y). The majority of the patients presented were localized disease (38.3%), while 19.4% presented with lymphatic involvement. Amongst 507 (19.6%) patients presenting with metastatic disease, 126 patients have deceased. Conclusions: This population has unique characteristics compared to their geriatric and pediatric counterparts. With an increased incidence and expected longer survivals, more efforts are needed to better understand the clinicopathological features of the AYA population. This will enable us to better survival rates and long-term treatment outcomes.

Effect of Aging on NK Cell Population and Their Proliferation at Ex Vivo Culture Condition.

Age-associated changes in natural killer (NK) cell population, phenotype, and functions are directly attributed to the risk of several diseases and infections. It is predicted to be the major cause of the increase in mortality. Based on the surface density of CD56, NK cells are subdivided into two types, such as CD56bright and CD56dim cells, which represent cytokine production and cytotoxicity. In our study, we have examined the age-associated changes in the NK cell population and their subsets at different age groups of males and females (at a range from 41 to 80 years). We found that the total lymphocyte count significantly dropped upon aging in both genders. Although, the level of total immune cells also dropped on aging, and surprisingly the total NK cell population was remarkably increased with the majority of NK cells being CD56dim. Subsequently, we evaluated the proliferation potential of NK cells and our results showed that the NK cell proliferation ability declines with age. Overall, our findings prove that there is an increase in the circulating NK cell population upon aging. However, the proliferation rate upon aging declines when compared to the young age group (<41 yrs).

Quantitative radiological evaluation of interaction of lumbar vertebral bone marrow fat, bone mineral density and age

Objective To explore the change patterns in the lumbar vertebral bone marrow fat content with age, analyze the interactions between lumbar vertebral bone marrow fat content, bone mineral density (BMD), and age, and compare the difference of lumbar vertebral bone marrow fat content between males and females in the same age groups. Methods According to the statistical sample size requirements that the minimum sample size of each group was 18, thus, we prospectively recruited healthy volunteers who met the inclusion criteria. Among them, there were 139 males and females, with age range of 21-70 years old. According to age, the patients were divided into group 1 (21-30-yr), group 2 (31-40-yr), group 3 (41-50-yr), group 4 (51-60-yr), and group 5 (61-70-yr). Quantitative computed tomography (QCT) was used to measure the lumbar vertebral BMD, and MR mDIXON-Quant technique was used to measure the marrow fat content of L3 lumbar vertebra. We compared the difference of lumbar vertebral bone marrow fat content and BMD between different age groups in males and females using one-way ANOVA, and compared the difference of lumbar vertebral bone marrow fat content and BMD between males and females in the same age groups using t-test. Correlation analysis was conducted between bone marrow fat content, BMD and age. Results Lumbar vertebral bone marrow fat content was generally increasing with the age. There were significant differences in the fat content of bone marrow at different age groups (male, F=13.598, P=0.000; female, F=73.419, P=0.000). Before the age of 50 years, lumbar vertebral bone marrow fat content in females was lower than one in males, and there was a significant difference between group 2 [females, (29.7±7.1) %- (36.1±6.6) %, males, (34.1±8.4) %- (39.9±5.9) %;21-30-yr, t=1.984, P=0.053;31-40-yr, t=5.699, P=0.000;41-50-yr, t=2.017, P=0.050]. Females older than 50 years had a higher marrow fat content than males, and there was a significant difference between group 5 [females, (48.3±8.8) %- (52.5±8.2) %, males, (45.5±8.1) %- (46.2±7.4) %;51-60-yr, t=-0.914, P=0.365;61-70-yr, t=-3.400, P=0.001]. For males, bone marrow fat content was positively correlated with age (r=0.527, P<0.05), and negatively correlated with BMD (r=-0.730, adjusted for age r=-0.584, P<0.05). For females, bone marrow fat content was positively correlated with age (r=0.761, P<0.05), and negatively correlated with BMD (r=-0.809, adjusted for age r=-0.473, P<0.05). Conclusions Lumbar vertebral bone marrow fat content was generally increasing with the age. Bone marrow fat content was positively correlated with age and negatively correlated with BMD for males and females. Key words: Lumbar vertebrae; Bone density; Age distribution; Bone marrow fat; Imaging assessment

A Study on Coronary Atherosclerosis-An Autopsy based Study

Atherosclerosis is an endothelial dysfunction of the arteries and the leading cause of death and disability in the developed world and usually involves the aorta, large and medium sized elastic and muscular arteries of the heart, brain, kidneys and extremities, predisposing such organs to ischemic injury. In coronary arteries it causes myocardial infarction and angina pectoris, in central nervous system it provokes strokes and transient cerebral ischemia, in kidneys renal artery stenosis, in peripheral circulation it causes intermittent claudication and gangrene and can jeopardize limb viability.(14) Atherosclerosis involves the development of a plaque composed of variable amounts of connective tissue matrix, vascular smooth muscle cells, lipoproteins, calcium, inflammatory cells, chiefly monocyte-derived macrophages, T lymphocytes and mast cells and new blood vessels (neoangiogenesis). The Study is prospective and one Hundred hearts are examined from the different age groups of males and females, during the medico legal Autopsies. The study showed significantly the higher proportion of atherosclerosis in males than females and prevalence rate is increased as the age is increased and significant lesions are seen in chronic smokers, alcoholics and in non vegetarians.

Role of Coronary Thrombosis in Sudden Deaths-Autopsy based Study

Death occurring instantaneously or within one hour of the onset of the morbid symptoms. As per the World Health Organization 24 hours is the limitation period.(9) Sudden death is within 24 hours of the onset of the symptoms, but in forensic practice most of the deaths occur within minutes or even in seconds of onset of the symptoms.(16) Or Sudden cardiac death is usually from cardiac cause, heralded by abrupt loss of consciousness within one hour of the onset of acute symptoms. Sudden death is important from medico legal point of view, as it raises a suspicious of foul play. When a natural death is very rapid, the cause is almost inevitably Cardiovascular. (16). Acute occlusion of coronary artery results from thrombosis or haemorrhage within the walls of the artery leads to ischemia. Death of foam cells by necrosis/apoptosis leading to necrotic lipidcore formation. Finally rupture of fibrous cap or endothelial erosion, exposure to thrombogenic substrate and arterial thrombosis. An improved understanding of the patho physiology of atherosclerosis providing novel direction for its prevention and treatment. The Study is prospective and one hundred hearts are examined from the different age groups of males and females, during the medico legal Autopsies to know the severity of Atherosclerosis, among them three cases are reported as sudden deaths, though the sample size is minimum, significant results are obtained and the results are statistically analysed.

Phenotypic and morphological characterization and reproduction attributes of native pigs in Bangladesh

The study was undertaken for a period of 30 days to investigate the phenotypic, morphological and reproduction attributes of native pigs in 14 villages of Haluaghat, Durgapur and Nalitabari upazilas in Mymensingh, Netrokona and Sherpur districts, respectively. A total of 200 experimental animals were evaluated, of which 81 were male and 119 were female. Various parameters were evaluated separately at different age groups in males and females. A pre-tested questionnaire was used to record various phenotypic information. Body weight, body length, chest girth, length from ear to tail, height at withers, height at loin region, head length, width of head, ear length, hair length, tail length and number of teats were the morphometric traits recorded. The predominant coat colour of the pigs was black, with 95 percent of them having dark skin pigmentation. The majority of pigs possessed a long, straight head (75 percent) and the rest had a shape classified as a “wide face”. All of them had erect ears with upward orientation, whereas 98.5 percent had thin, straight tails. The pigs with stocky body shape (27.5 percent) showed larger body measurements than animals with angular body shape (72.5 percent). The mean values along with the Standard Error for traits were statistically analysed. Three main independent variables (i.e. upazila, age and sex) were considered for an univariate analysis of variance and the correlations among traits were measured. The average, minimum and maximum values for age at first farrowing, farrowing interval, litter size, gestation period and weaning period were also measured.

Flight Capacity of Adult &lt;I&gt;Culex pipiens pallens&lt;/I&gt; (Diptera: Culicidae) in Relation to Gender and Day-Age

Culex pipiens pallens (L.) is the most common mosquito in houses of central and northern China. It is the primary vector of lymphatic filariasis and Japanese encephalitis. The flight range of mosquitoes is an important factor predicting the risk area of transmission of mosquito-borne pathogens to vertebrate hosts. The flight performance of Cx. pipiens pallens was measured with a 26-channel computer-monitored flight-mill system. We found that females had longer flight capability than males for total flight distance (TFD) and total flight duration (TFDr), and females flew faster than males based on mean flight velocity. No significant difference in flight capability was found between different age-groups in males. However, certain age-groups of females showed significant differences in TFDr and TFD. Specifically, TFD and TFDr tended to be shortest for 5- and 6-d-old females. These significant differences in flight capability between ages and genders provide insights to determine the size of operational area to achieve effective control of Cx. pipiens pallens and minimize the risk of the related mosquito-borne epidemic diseases of lymphatic filariasis and Japanese encephalitis.

Age-related changes of arm movements in dual task condition when walking on different surfaces

The purpose of this study was to investigate whether the dual task paradigm would influence arm movements during walking. Furthermore, we examined the effects of different walking surfaces on arm movements while performing dual tasks. The effects of age and gender were also investigated. Fifteen young adults and 15 older adults were included in this study. Subjects were asked to perform the walking task alone (single-task trial) and walking in combination with a cognitive task (dual-task trial). Four walking conditions (1 single task and 3 dual task trials)×two walking surfaces were encountered. Both age groups had greater elbow and trunk movement in the sagittal plane under the dual task trials as compared to the single task trial (p<.05). Subjects had greater upper extremity and upper body movement on the soft floor than on the hard floor (p<.05). Subjects had greater movement amplitude when confronting a challenging environment, especially in the contralateral side. Among gender, there was a group-gender interaction: the older females had smaller upper extremity movement than the older males (p<.05) but the opposite was true for the young adults. The results suggest that different age groups of males and females use different balance control strategy to deal with the challenging conditions.

Identifying Students' Interests in Biology Using a Decade of Self-Generated Questions

An identification of students’ interests in biology can help teachers better engage their pupils and meet their needs. To this end, over 28,000 self-generated biological questions raised by students from kindergarten through graduate school were analyzed according to age and gender. The sample demonstrated a dominance of female contributions among K- 12 students. However, girls’ interest in submitting questions dropped as they grew older. Topics popular among different age groups of males and females were identified, and the development of interest was described. Ways in which students’ interests can be incorporated into a standard-based curriculum are discussed, mainly as a trigger for the learning of less popular subjects which are required by the curricula.

Ethnic-, gender-, and age-related differences in femorotibial angle, femoral antetorsion, and tibiofibular torsion: Cross-sectional study among healthy Japanese and Australian Caucasians

The current study was conducted to examine ethnic, gender, and age-related differences in femorotibial angle (FTA), femoral antetorsion and tibiofibular torsion. Healthy Japanese (n = 120) and Australian Caucasian (n = 82) subjects were examined using a series of clinically reliable methods for measuring FTA and torsion of the lower limb. Subjects between 18-29 years of age were categorized as younger, 30-59 years as middle age, and 60 or more as older age. Three-way analysis of variance was utilized for data analysis. The Japanese subjects had significantly greater FTA (more varus) than the Australian subjects (P < 0.001). Femoral antetorsion in the Japanese subjects was significantly smaller in middle and older age groups than younger group (P < 0.05), but did not differ between the age groups in the Australian subjects. Further, tibiofibular torsion in female subjects was significantly greater in younger and middle age groups than the older age group (P < 0.01), but was not different between different age groups in males. The results suggest that healthy Japanese may have more genu varus alignment compared to the corresponding Australian population. Age-related ethnic and gender differences in femoral and tibiofibular torsion are worthy of further study.