The association of season of birth with cognitive development,academic perfor-mance and educational attainment has been well documented in western countries.However,little research has been conducted in developing cou...The association of season of birth with cognitive development,academic perfor-mance and educational attainment has been well documented in western countries.However,little research has been conducted in developing countries to examine the seasonality of cognitive achievement.In this study,we analyzed data of a nationally representative sample of over 8500 rural adults born in the 1960s and early 1970s from the 2010 China Family Panel Studies survey.The results of logistic regression models demonstrate a significant association of birth month with educational attain-ment even with relevant individual and parental information controlled.Specially,we found that rural respondents born in the months of March and April are much less likely to obtain a high school degree than those born late in the year from Octo-ber to December.The seasonal pattern is also found to significantly affect current cognitive achievements of the respondents even after their educational attainment and family social economic conditions are taken into account.Finally,we discussed the merits of age position theory and fetal origin interpretation as potential mecha-nisms for the seasonal pattern of education attainment,and suggest that seasonal changes of nutritional intake for pregnant mothers are the most likely cause.展开更多
Time and environmental physical activity are involved in timing of many medical events. In a recent study published by the National Academy of Science, USA it was shown that month of birth is related to longevity. The...Time and environmental physical activity are involved in timing of many medical events. In a recent study published by the National Academy of Science, USA it was shown that month of birth is related to longevity. The aim of this study was to check the month of birth distribution in a great group of AMI patients of both gender, one of the great killers in the developed countries, to check the mentioned paradigm of month of birth and longevity. Methods & Patients: Patients admitted to Cardiology Departments of a tertiary University Hospital in Kaunas, Lithuania with AMI at years 1990-2010 (n-22047) were studied. Month of birth of these patients, total and both gender were checked. Monthly, quarterly and trimester comparison were done. Statistical differences established using t-Student test and distribution by percents of the yearly months of birth. Results: It was a significant difference in the month of birth of the studied AMI population. January and first quarter and trimester born patients were more often in the studied AMI patients group. The higher morbidity by Cardiovascular diseases can be a significant ingredient in the structure of population longevity. Possible mechanisms explaining our findings are discussed. Conclusion: In the AMI population people born in January, first quarter or trimester of the year are dominating in both gender groups. The results of this study can be an additional confirmation of the paradigm about links between month of birth and longevity.展开更多
Background: The etiology of Crohn’s disease (CD) and Ulcerative Colitis (UC) remains unclear. It has been suggested that apart from genetic factors, prenatal or perinatal environmental factors could change the risk o...Background: The etiology of Crohn’s disease (CD) and Ulcerative Colitis (UC) remains unclear. It has been suggested that apart from genetic factors, prenatal or perinatal environmental factors could change the risk of developing inflammatory bowel disease (IBD) later in life. Seasonality in birth distribution over the year has been demonstrated for several immune diseases, but studies on IBD have had inconsistent results. Aim: The aim of this study was to investigate in the Netherlands the effect of the month of birth on the probability to develop IBD later in life. Methods: Birth data from CD patients and UC patients of 4 different Dutch hospitals were compared to a control group of irritable bowel syndrome (IBS) patients from the same hospitals. A chi-square test was used to test whether there was heterogeneity between the monthly and seasonal birth rates of the three groups. Results: The patient cohort consisted of 1183 CD patients and 1293 UC patients. The control group consisted of 2113 IBS patients. Data showed no difference in birth distribution over the year or over the four seasons of IBD patients as compared to the control group. P-values over the year and over the seasons respectively are 0.428 and 0.237 for CD and 0.311 and 0.812 for UC. Conclusions: There is no seasonality in the distribution of births of IBD patients as compared to controls. The hypothesis that environmental factors present at the time of birth play a role in the pathogenesis of IBD is not supported by these data.展开更多
In recent years some interrelationships between time of birth and longevity were published. Concomitant publications appeared demonstrating links between Space Weather and the timing of medical events;in part of both ...In recent years some interrelationships between time of birth and longevity were published. Concomitant publications appeared demonstrating links between Space Weather and the timing of medical events;in part of both these studies it was shown that Space Weather indices are stronger connected with the time of conception as with the birth time. The aim of these study was to consider birth and conception month of patients suffering from a number of “big killer” pathologies, affecting human longevity and comparing with published data on centenarians—100 - 112 years old persons in the USA. Patients and Methods: We included monthly births distribution of our four papers including patients with Acute Myocardial Infarction undergoing Percutaneous Coronary Intervention (PCI)—n-3765, and admitted in another tertiary medical facility for AMI—n-22,047, and, also patients suffering Rapid—n-1239 and Sudden Cardiac Death—n-327 and, also, patients with oncologic malignancies—n-44587. At all in this group 71,965 patients were included. Their birth and conception months were compared with analogical data of 1574 people of 100 - 112 years old using data of L.A. and N.S. Gavrilov for USA centenarians. Results: The birth months of the cardiovascular and oncology patients were maximal in January, March and April (above 10% at each of these months);their conception was maximal in April, June and July. The monthly distribution of conception and birth of the studied population is presented in Tables 1-3. The maximal birth months of the centenarians were November, September, and October;the maximal conception months were December, January, and February. Conclusion: People suffering Myocardial Infarction, Sudden Cardiac Death and Oncologic Malignancies are in higher numbers born in the first four months of the year and conception in April, June and July. The maximal birth months of the very old people were November, September and October and conception were December, January and February.展开更多
We studied characteristics of birth-site and early mother-infant relationship of golden takin Budorcas taxicolor bedfordi from February 2004 to March 2004 in Foping National Nature Reserve,Shaanxi(E107°41′-107&#...We studied characteristics of birth-site and early mother-infant relationship of golden takin Budorcas taxicolor bedfordi from February 2004 to March 2004 in Foping National Nature Reserve,Shaanxi(E107°41′-107°55′,N33°33′-33°46′).Total of 108 wild takins including 11 calves was accumulatively observed.The birth season of Takin occurred from early February to late March.The earliest observation of a new born calf during the study period was on 10 February,and the latest one was on 20 March.During field work we located four birth sites at the upper position of the southern slope covered by vegetation of deciduous broad-leafed forest or mixed coniferous and broadleaved forest.Calves were delivered at a small flat of 6.78±4.65 m2 located from 2 020 to 2 404 m in elevation either blocked by bamboo forest or against a steep slope.Female takins delivered their calf with the group,and the calf was capable moving with their mother soon after birth.Mother-infant relationship was very close when calf was less than 7 days old.Mother gave a special care to her infant less than 2 days old.However,the distance between mother and calf became greater when the infant exceeded 7 days of age.The attention of mother on her calf declined as it grew up to 7 days in age.展开更多
文摘The association of season of birth with cognitive development,academic perfor-mance and educational attainment has been well documented in western countries.However,little research has been conducted in developing countries to examine the seasonality of cognitive achievement.In this study,we analyzed data of a nationally representative sample of over 8500 rural adults born in the 1960s and early 1970s from the 2010 China Family Panel Studies survey.The results of logistic regression models demonstrate a significant association of birth month with educational attain-ment even with relevant individual and parental information controlled.Specially,we found that rural respondents born in the months of March and April are much less likely to obtain a high school degree than those born late in the year from Octo-ber to December.The seasonal pattern is also found to significantly affect current cognitive achievements of the respondents even after their educational attainment and family social economic conditions are taken into account.Finally,we discussed the merits of age position theory and fetal origin interpretation as potential mecha-nisms for the seasonal pattern of education attainment,and suggest that seasonal changes of nutritional intake for pregnant mothers are the most likely cause.
文摘Time and environmental physical activity are involved in timing of many medical events. In a recent study published by the National Academy of Science, USA it was shown that month of birth is related to longevity. The aim of this study was to check the month of birth distribution in a great group of AMI patients of both gender, one of the great killers in the developed countries, to check the mentioned paradigm of month of birth and longevity. Methods & Patients: Patients admitted to Cardiology Departments of a tertiary University Hospital in Kaunas, Lithuania with AMI at years 1990-2010 (n-22047) were studied. Month of birth of these patients, total and both gender were checked. Monthly, quarterly and trimester comparison were done. Statistical differences established using t-Student test and distribution by percents of the yearly months of birth. Results: It was a significant difference in the month of birth of the studied AMI population. January and first quarter and trimester born patients were more often in the studied AMI patients group. The higher morbidity by Cardiovascular diseases can be a significant ingredient in the structure of population longevity. Possible mechanisms explaining our findings are discussed. Conclusion: In the AMI population people born in January, first quarter or trimester of the year are dominating in both gender groups. The results of this study can be an additional confirmation of the paradigm about links between month of birth and longevity.
文摘Background: The etiology of Crohn’s disease (CD) and Ulcerative Colitis (UC) remains unclear. It has been suggested that apart from genetic factors, prenatal or perinatal environmental factors could change the risk of developing inflammatory bowel disease (IBD) later in life. Seasonality in birth distribution over the year has been demonstrated for several immune diseases, but studies on IBD have had inconsistent results. Aim: The aim of this study was to investigate in the Netherlands the effect of the month of birth on the probability to develop IBD later in life. Methods: Birth data from CD patients and UC patients of 4 different Dutch hospitals were compared to a control group of irritable bowel syndrome (IBS) patients from the same hospitals. A chi-square test was used to test whether there was heterogeneity between the monthly and seasonal birth rates of the three groups. Results: The patient cohort consisted of 1183 CD patients and 1293 UC patients. The control group consisted of 2113 IBS patients. Data showed no difference in birth distribution over the year or over the four seasons of IBD patients as compared to the control group. P-values over the year and over the seasons respectively are 0.428 and 0.237 for CD and 0.311 and 0.812 for UC. Conclusions: There is no seasonality in the distribution of births of IBD patients as compared to controls. The hypothesis that environmental factors present at the time of birth play a role in the pathogenesis of IBD is not supported by these data.
文摘In recent years some interrelationships between time of birth and longevity were published. Concomitant publications appeared demonstrating links between Space Weather and the timing of medical events;in part of both these studies it was shown that Space Weather indices are stronger connected with the time of conception as with the birth time. The aim of these study was to consider birth and conception month of patients suffering from a number of “big killer” pathologies, affecting human longevity and comparing with published data on centenarians—100 - 112 years old persons in the USA. Patients and Methods: We included monthly births distribution of our four papers including patients with Acute Myocardial Infarction undergoing Percutaneous Coronary Intervention (PCI)—n-3765, and admitted in another tertiary medical facility for AMI—n-22,047, and, also patients suffering Rapid—n-1239 and Sudden Cardiac Death—n-327 and, also, patients with oncologic malignancies—n-44587. At all in this group 71,965 patients were included. Their birth and conception months were compared with analogical data of 1574 people of 100 - 112 years old using data of L.A. and N.S. Gavrilov for USA centenarians. Results: The birth months of the cardiovascular and oncology patients were maximal in January, March and April (above 10% at each of these months);their conception was maximal in April, June and July. The monthly distribution of conception and birth of the studied population is presented in Tables 1-3. The maximal birth months of the centenarians were November, September, and October;the maximal conception months were December, January, and February. Conclusion: People suffering Myocardial Infarction, Sudden Cardiac Death and Oncologic Malignancies are in higher numbers born in the first four months of the year and conception in April, June and July. The maximal birth months of the very old people were November, September and October and conception were December, January and February.
文摘We studied characteristics of birth-site and early mother-infant relationship of golden takin Budorcas taxicolor bedfordi from February 2004 to March 2004 in Foping National Nature Reserve,Shaanxi(E107°41′-107°55′,N33°33′-33°46′).Total of 108 wild takins including 11 calves was accumulatively observed.The birth season of Takin occurred from early February to late March.The earliest observation of a new born calf during the study period was on 10 February,and the latest one was on 20 March.During field work we located four birth sites at the upper position of the southern slope covered by vegetation of deciduous broad-leafed forest or mixed coniferous and broadleaved forest.Calves were delivered at a small flat of 6.78±4.65 m2 located from 2 020 to 2 404 m in elevation either blocked by bamboo forest or against a steep slope.Female takins delivered their calf with the group,and the calf was capable moving with their mother soon after birth.Mother-infant relationship was very close when calf was less than 7 days old.Mother gave a special care to her infant less than 2 days old.However,the distance between mother and calf became greater when the infant exceeded 7 days of age.The attention of mother on her calf declined as it grew up to 7 days in age.
