Search results for "interval"
showing 10 items of 1703 documents
Childhood cancer and residential radon exposure - results of a population-based case-control study in Lower Saxony (Germany)
1999
A population-based case-control study on risk factors for childhood malignancies was used to investigate a previously reported association between elevated indoor radon concentrations and childhood cancer, with special regard to leukaemia. The patients were all children suffering from leukaemia and common solid tumours (nephroblastoma, neuroblastoma, rhabdomyosarcoma, central nervous system (CNS) tumours) diagnosed between July 1988 and June 1993 in Lower Saxony (Germany) and aged less than 15 years. Two population-based control groups were matched by age and gender to the leukaemia patients. Long-term (1 year) radon measurements were performed in those homes where the children had been liv…
High-birth weight and other risk factors for Wilms tumour: results of a population-based case-control study.
2001
Wilms tumour, or nephroblastoma, is one of the childhood cancers included in two recent population-based case-control studies in West Germany. Altogether, 177 children under the age of 10 years with Wilms tumour diagnosed between 1988 and 1994 and 2006 control children sampled from population registration files participated. Information on potential risk factors was obtained from the parents using a questionnaire and by subsequent telephone interview. We found an association with a high birth weight >4000 g (odds ratio 1.58; 95% confidence interval 1.01–2.48), which was somewhat stronger for children aged 2 years or older. Findings for young maternal age at birth and certain parental occupa…
Air Pollution and Recent Symptoms of Asthma, Allergic Rhinitis, and Atopic Eczema in Schoolchildren Aged Between 6 and 7 Years
2008
Abstract Objective The objective of the study was to analyze the relationship between air pollutants and the prevalence of recent symptoms of asthma, allergic rhinitis, and atopic eczema in schoolchildren aged between 6 and 7 years. Patients and Methods The prevalence of recent (previous 12 months) symptoms of allergic diseases was obtained by means of the questionnaire of the International Study of Asthma and Allergies in Childhood (ISAAC), Spain, with the participation of 7 centers (Asturias, Barcelona, Bilbao, Cartagena, La Coruna, Madrid, and Valencia) and 20 455 schoolchildren aged between 6 and 7 years, from 2002 to 2003. The pollutant detection systems of the aforementioned centers p…
Sexual Dimorphism in the Transition From Masked to Sustained Hypertension in Healthy Youths
2013
The risk and factors related to the development of hypertension among healthy youths with elevated ambulatory and normal conventional blood pressure, masked hypertension, have not been established. We performed a long-term follow-up study assessing how hypertension develops over time in healthy, masked hypertensive youths. The potential sex dimorphism in the incidence and timing of the development of hypertension has been analyzed. In a long-term follow-up study (median follow-up, 36 months), we enrolled 272 healthy conventional normotensive youths (aged 6–18 years; 55.8% girls) of whom 39 had masked hypertension at baseline. Development of sustained hypertension (hypertension in both conv…
Maternal occupation in the leather industry and selected congenital malformations.
1998
OBJECTIVES: Data from a hospital based case-control study were analysed to assess the relation between maternal occupation in the leather industry and several groups of congenital defects (nervous system, cardiac defects of closure, oral cleft, epispadia or hypospadia, and multiple anomalies). METHODS: Cases and controls were selected from eight public hospitals in Comunidad Valenciana, Spain, in 1993 and 1994. Cases were located from the hospital discharge records, including children born and diagnosed in some of the selected hospitals during their first year of life. Controls were selected from births without congenital defects in the same hospitals and dates of the cases (ratio 1:1). Bot…
Paracetamol and antibiotics in childhood and subsequent development of wheezing/asthma: association or causation?
2011
Background Several studies found an association between early administration of paracetamol and antibiotics and development of wheezing. This could be due to confounding: wheeze and asthmatic symptoms in early childhood are difficult to distinguish from respiratory tract infections that are widely treated with these drugs; in case of persistence of symptoms up to school age, this could explain the observed relationship. Methods We investigated the association between paracetamol and antibiotics use in the first year of life and wheezing phenotypes, i.e. wheezing starting in different time periods (early, persistent and late-onset) in the SIDRIA-2 study, a cross-sectional survey of 16,933 ch…
Prevalence of microcephaly in Europe: population based study.
2016
Objectives: Microcephaly is a congenital anomaly where the baby’s head is smaller than expected when compared with babies of the same sex, age and ethnicity. Many of these babies will have underdeveloped brains. This study aimed to provide contemporary estimates of the prevalence of microcephaly in Europe, determine if the diagnosis of microcephaly is consistent across Europe and to evaluate whether changes in prevalence would be detected using the current European surveillance performed by EUROCAT (the European Surveillance of Congenital Anomalies). Design: A questionnaire and a population-based, observational study Setting: 24 EUROCAT registries covering 570,000 births annually in 15 coun…
Accuracy of death certificates for motor neuron disease and multiple sclerosis in the province of Palermo in southern Italy
2002
Mortality studies based on death certificates (DCs) are relatively inexpensive and easy to conduct. Therefore, they are frequently used to evaluate variations of geographical and temporal patterns, particularly in uncommon diseases. Recent surveys of motor neuron disease (MND) and multiple sclerosis (MS) based on official mortality statistics in Italy showed a decreasing trend of mortality from northern to southern Italy. To evaluate if DCs are homogeneously recorded in Italy and whether or not they can be considered a good instrument for mortality studies, we assessed the accuracy of DCs for MND and MS in the province of Palermo, Italy, and compared our results with those reported in other…
Gestational age and 1-year hospital admission or mortality: a nation-wide population-based study
2017
International audience; Background: Describe the 1-year hospitalization and in-hospital mortality rates, in infants born after 31 weeks ofgestational age (GA).Methods: This nation-wide population-based study used the French medico-administrative database to assess thefollowing outcomes in singleton live-born infants (32–43 weeks) without congenital anomalies (year 2011): neonatalhospitalization (day of life 1 – 28), post-neonatal hospitalization (day of life 29 – 365), and 1-year in-hospital mortalityrates. Marginal models and negative binomial regressions were used.Results: The study included 696,698 live-born babies. The neonatal hospitalization rate was 9.8%. Up to 40 weeks,the lower the…
No Benefit of a Pediatric Screening in Discovering Reduced Visual Acuity in Children: Experiences from a Cross-Sectional Study in Germany
2020
Background: The newly introduced German pediatric screening examination at the end of the third year of life (U7a) incorporates visual function testing in particular