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Results 401 - 450 of 717
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Sumelahti M L - - 2000
Previous surveys in Finland from the 1960s have documented an uneven geographic distribution of multiple sclerosis (MS). In the present study, the incidence of MS was studied during 1979-1993 in the western Vaasa and Seinäjoki regions and in southern Uusimaa. The overall difference between the western and southern regions persisted; ...
Li X - - 2000
The density and distribution of Ixodes pacificus was assessed at 2 parks in north coastal California. The density of I. pacificus adults and nymphs varied significantly between years, trails, and sides of trails. Adult ticks occurred on vegetation along sun-exposed trails in January through March, their density (0-1.93 per 20 ...
Suvisaari J M - - 2000
BACKGROUND: Patients with schizophrenia have a winter-spring excess of births compared with the general population, the cause of which is unresolved. Fluctuations in the magnitude of the seasonal variation may provide clues to its aetiology. METHODS: All Finnish patients with schizophrenia born between 1950 and 1969 (N = 15892) were ...
Cannon T D - - 2000
In this study, we examined whether fetal hypoxia and other obstetric complications (OCs) are related to risk for adult schizophrenia; whether such effects are specific to cases with an early age at onset; and whether the obstetric influences depend on, covary with, or are independent of familial risk. Subjects were ...
Portnoy J - - 2000
BACKGROUND: The Burkard sampler is a widely used volumetric pollen and spore collector, in part, because it is wind-oriented, it has consistent flow characteristics, and it permits time-discrimination of collected particles. Its main disadvantages are that it is heavy, expensive, and visual counting is very time-consuming. A less-expensive volumetric collector ...
Kirkpatrick B - - 2000
Previous studies have found two risk factors associated with the deficit syndrome of schizophrenia: an increase in summer births, compared to others with schizophrenia; and a higher risk of schizophrenia in relatives. In data from the Camberwell Register Psychosis Series, a population-based sample that approximated a treated-incidence sample, the deficit/nondeficit ...
Vounatsou P - - 2000
The incidence of fever among infants in the village of Idete in the Morogoro region of Tanzania was analyzed in relation to densities of Plasmodium falciparum parasites in the peripheral blood. Parasite densities in both fever cases and in asymptomatic infants, were compared and a Bayesian non-parametric mixture decomposition algorithm ...
Doblhammer G - - 2000
We present an analysis of birth seasonality in nine geographical regions within Austria for two time periods, 1881-1912 and 1947-1959. In the early period, geography, climate, and agricultural patterns were related to birth seasonality. By the latter time period, these factors were no longer related to birth seasonality. We propose ...
Gloria-Bottini F F Chair of Preventive and Social Pediatrics, University of Rome Tor Vergata, School of Medicine, Rome, - - 2000
Based on the hypothesis that maternal-fetal genetic differences in membrane transport and signal transduction may influence intrauterine development, the recent acquisition on transport function of Rh protein prompted us to study the relationship between joint maternal-fetal Rh phenotype and birth weight. Considering that metabolic effect of maternal-fetal competition could be ...
McGrath J - - 1999
The central nervous system is increasingly being recognised as a target organ for vitamin D via its wide-ranging steroid hormonal effects and via the induction of various proteins such as nerve growth factor. This paper proposes that low maternal vitamin D may impact adversely on the developing foetal brain, leaving ...
Moore S E - - 1999
Research over the past decade has suggested that prenatal and early postnatal nutrition influence the risk of developing chronic degenerative diseases up to 60 years later. We now present evidence that risk of death from infectious diseases in young adulthood is similarly programmed by early life events. In three rural ...
Walsh R P - - 1999
Climatic records for Danum for 1985-1998, elsewhere in Sabah since 1879, and long monthly rainfall series from other rainforest locations are used to place the climate, and particularly the dry period climatology, of Danum into a world rainforest context. The magnitude frequency and seasonality of dry periods are shown to ...
Castrogiovanni P - - 1999
Several studies have investigated the seasonal distribution of the birth dates of patients with psychiatric diseases. Our purpose was to verify if there is a specific distribution (by month) of birth dates in subjects with panic disorder (PD). The birth dates of 843 outpatients with a diagnosis of PD were ...
Battle Y L - - 1999
Research literature supports the notion that more people diagnosed with schizophrenia are born during the winter months than other seasons [O'Hare A, Walsh D, Torrey F. Seasonality of schizophrenia births in Ireland. Br J Psychiatry 1980;137:74 7; Pulver AE, Stewart W, Carpenter WT, Jr., Childs B. Risk factors in schizophrenia: ...
Landau E C - - 1999
Variations of season of birth among autistic individuals were studied. The replicability of previously reported increases in birth rates in the months of March and August were examined in groups of individuals with autism or mental retardation (the comparison group). The sample was obtained from the Yale Child Study Center ...
Dollfus S - - 1999
In order to test the hypothesis that an excess of summer births is a risk factor for deficit syndrome, the month of birth was studied in 53 deficit schizophrenic patients compared to 158 non-deficit patients. No significant difference in terms of month of birth or season of birth was observed ...
Nonaka K - - 1999
We used a population-based historical French Canadian database to examine the effects of mother's birth season on sex ratio at birth. Non-first births in the database (n = 127,658) were analyzed for their sex, parish size (2 large parishes of Montreal and Quebec or the other smaller parishes), time period ...
Peng X - - 1999
A study of the abnormal sex ratio at birth in China reveals that it is not an entirely new phenomenon that emerged since the 1980s, but is simply more visible at present. Deliberate intervention to determine the sex of children has existed in the past few decades, at least in ...
Barr D B - - 1999
The disc-macula distance to disc diameter ratio (DM:DD ratio) has been advocated as a method of supporting the diagnosis of optic nerve hypoplasia. A DM:DD ratio of 3.00 has been claimed to be a satisfactory threshold value for this purpose. This study has critically evaluated the above claim and found ...
Riordan D - - 1999
BACKGROUND: Psychiatric mother and baby units are increasingly asked to assess parenting in people with severe mental illness, particularly schizophrenia, but little research evidence exists on which to base assessments. METHOD: Mother-infant interaction was assessed in 26 women who had recovered from the acute phase of severe post-partum mental disorder, ...
Angulo-Romero J - - 1999
In this study, we have analyzed the presence of conidia belonging to different species of the genus Alternaria in the atmosphere of the city of Cordoba, using a Hirst sampler. The results show that spores of this genus are present all year, with a clear seasonal pattern which shows two ...
Suvisaari J - - 1999
OBJECTIVE: The authors' goal was to determine whether there is an association between prenatal exposure to poliovirus infection and later development of schizophrenia. METHOD: All Finnish patients born between 1951 and 1969 with discharge diagnoses of schizophrenia (N = 13,559) were identified from the Finnish Hospital Discharge Register. Information on ...
Youssef H A - - 1999
This study examined geographical variation in rate of occurrence of schizophrenia by place at birth vs place at onset, among a rural Irish catchment area population of unusual stability and socioeconomic homogeneity. Within a catchment area of 21,520 persons, all cases of schizophrenia were sought using current inpatient and outpatient ...
Alley M R - - 1999
AIM: An intensive 2-year field study of 65 hihi (or stitchbirds) on Mokoia Island provided an opportunity to investigate the causes of mortality of this endangered species in a free-living environment. METHODS: The birds were observed daily during the breeding season (October to March) and every 4 weeks during the ...
Holekamp K E - - 1999
Reproductive seasonality was examined in an equatorial population of free-living spotted hyaenas (Crocuta crocuta) in Kenya. The study population was observed continuously for 10 years, during which time the dates of all births, conceptions, weanings, and cub deaths were recorded. Local prey abundance was estimated two to four times per ...
Browne D R - - 1999
Spatial and temporal variation in airborne lead and total suspended particulates was examined in the city of Semarang, Indonesia, and surrounding area. Both airborne lead and TSP varied significantly with the type of urban development. Mean urban airborne lead levels were 0.35 microgram/m3 in the highway zone, 0.95 microgram/m3 in ...
Douglas S - - 1999
There is extensive literature describing the effect of season on mortality rates, especially in cardiovascular and respiratory disease. This study compares latitude with the extent of seasonal variation of monthly deaths from all causes. In developed countries, there is a peak of deaths in winter and a trough in summer. ...
Martin M - - 1999
In an earlier study, Dellatolas, Curt and Lellouch (1991) concluded that handedness is not related to season of birth. However, post-hoc exploration of their and other sets of data has shown that there is an apparent tendency for left-handedness to be more prevalent in the period March-July than in the ...
Claxton R P - - 1999
Several bodies of research link birth order and aggression. With a sample of 144 women and 225 men business students, the present study investigated birth order and aggression using two measures from academic marketing. Neither measure detected significant influence of birth order. Implications are discussed regarding marketing and consumers' behavior.
Nielsen R B - - 1999
A microbial culture enriched from a trichloroethene-contaminated groundwater aquifer reductively dechlorinated trichloroethene (TCE) and tetrachloroethene (PCE) to ethene. Initial PCE dechlorination rate studies indicated a first-order dependence with respect to substrate at low PCE concentrations, and a zero-order dependence at high concentrations. Studies of TCE and vinyl chloride (VC) dechlorination ...
Adeyemo A A - - 1999
Fontanelle sizes were studied in 200 term and appropriate-for-gestational age neonates delivered at the University College Hospital, Ibadan, Nigeria with the aim of determining their normal range of variation. The anterior and posterior fontanelle sizes were described using the range, mean, standard deviation and selected (3rd, 25th, 50th, 75th and ...
Yeates D K - - 1999
The order Diptera (true flies) is one of the most species-rich and ecologically diverse clades of insects. The order probably arose in the Permian, and the main lineages of flies were present in the Triassic. A novel recent proposal suggests that Strepsiptera are the sister-order to Diptera. Within Diptera, evidence ...
Levine R J - - 1999
At many locations in the northern hemisphere human sperm counts are reduced during the summer. Experiments with rhesus monkeys suggest that such seasonal variation may be induced by an endogenous biological clock reset annually by changes in the length of daylight. Little is known about seasonal variation in human female ...
Chotai J - - 1999
The cerebrospinal fluid (CSF) concentrations of the monoamine metabolites 5-hydroxyindoleacetic acid (5-HIAA), homovanillic acid (HVA) and 3-methoxy-4-hydroxyphenylglycol (MHPG) as well as their ratios and correlations were analyzed in relation to the season of birth. The sample consisted of 241 drug-free patients participating in psychobiological programs and comprising the DSM-III-R diagnoses ...
Krifi M N - - 1998
An adequate assessment of scorpion and snake venom LD50 is an important step for accurate evaluation of antivenom sera potencies and the optimization of serotherapy. The LD50 variation of Tunisian scorpion (Androctonus australis garzonii: Aag and Buthus occitanus tunetanus: Bot) venoms with body weight, sex and strain (Swiss or C57BI/6) ...
Procopio M - - 1998
OBJECTIVES: A recent British epidemiological study, having found that the seasonality of birth in a large epileptic sample was significantly different from that of the general population, has pointed to neurodevelopmental disruption as the likely mechanism to cause at least part of the epilepsies of unknown aetiology. The aim of ...
Matsuda S - - 1998
Based on vital statistics from 1979 to 1983, we used a time-series analysis using the Box-Jenkins model (ARIMA model) to compare the seasonality of preterm births among 47 prefectures in Japan. We also evaluated the relation between seasonality of preterm births and temperature. According to the Box-Jenkins analysis, a seasonal ...
Becker S - - 1998
BACKGROUND: Deaths exhibit a seasonal pattern in most parts of the world. Analyses of deaths for the years 1972-1974 from the vital registration system of Matlab, Bangladesh, published in this journal 17 years ago, showed sinusoidal seasonal patterns. As death rates have declined in other nations, the seasonal pattern is ...
Fukuda M - - 1998
We investigated the possible association between the Kobe earthquake (January 1995) and the sex ratio among live-born infants after the catastrophe. A significant decline in the sex ratio (0.501) of Hyogo Prefecture in October 1995 was observed 9 months after the Kobe earthquake as compared with an expected value of ...
Ajdacic-Gross V - - 1998
While studying birth cohort issues, the authors focused also on the seasons of birth in amyotrophic lateral sclerosis (ALS). The analyses were based on computerized death records of Swiss mortality statistics 1969-1993. The results confirm an excess of births in spring months. They suggest that risk factors in ALS can ...
Harding J J - - 1998
BACKGROUND: It has been suggested that season of birth might influence the susceptibility to cataract in later life. METHODS: This hypothesis was investigated using data pooled from two case-control studies carried out in Oxfordshire. RESULTS/CONCLUSION: The results showed no relation between month or season of birth and cataract in later ...
Lerchl A - - 1998
It was investigated whether there is a seasonal variation in sex ratio at birth in Germany. The analysis was based on records from the German Bureau for Statistics, covering the period from 1946 to 1995. A highly significant (P < or = 0.001), albeit low-amplitude rhythm was found with two ...
Lincetto O - - 1998
This study aimed to determine the impact of season and weight at discharge on growth rate and complications in low birthweight infants treated with Kangaroo Mother Care (KMC) in Maputo, Mozambique. The study population included 246 infants of birthweight < 2000 g. Follow-up until 2400 g was obtained in 64%. ...
Zucker K J - - 1998
This study examined the birth order of girls with gender identity disorder (N = 22). Each proband was matched to 3-7 clinical control girls for age at assessment and number of siblings (the mode number of controls per proband was 7) (total N = 147). The number of older brothers, ...
Donovan G A - - 1998
A prospective cohort study was undertaken to determine calf-level factors that affected calf health status between birth and 6 months of age. A convenience sample of approximately 3300 female Holstein calves born in 1991 on two large Florida dairy farms was used for the study. Data collected on each calf ...
Ortega M D - - 1998
Pirbright-type light traps were used to collect Culicoides biting midges (Diptera: Ceratopogonidae) at fifteen sites in twelve provinces of central Spain and Andalusia. A total of 293,625 Culicoides were collected in 1,387 samples over a two year period. These comprised approximately 9.2% Culicoides imicola, 11.4% C. pulicaris group, 1.6% C. ...
Deolalikar A - - 1998
"In this study we use data from rural India to examine the impact of the birth of a boy relative to the birth of a girl (i.e., the ¿gender shock') on the savings, consumption and income of rural Indian households. We find that the gender shock reduces savings for medium ...
Blackorby C - - 1997
"This paper investigates birth-date dependent principles for social evaluation in an intertemporal framework in which population size may vary. We weaken the strong Pareto principle in order to allow individuals' birth dates to matter in establishing a social ordering. Using the axiom independence of the utilities of the dead, we ...
Gloria-Bottini F - - 1997
We have studied the pattern of association between the season of conception and cytosolic low molecular weight phosphotyrosine phosphatase (ACP1) genetic polymorphism in 329 consecutively newborn infants from the population of Penne and 361 consecutively newborn infants from the population of Rome. In addition, 329 mothers were studied in the ...
Hoberg E P - - 1997
The phylogeny of the Eucestoda was evaluated based on a suite of 49 binary and multistate characters derived from comparative morphological and ontogenetic studies; attributes of adult and larval tapeworms were considered. A single most parsimonious tree (MPT) (consistency index = 0.872; retention index = 0.838; and homoplasy index = ...
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