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Stockholm, Sweden

Statistics Sweden is the Swedish government agency responsible for producing official statistics regarding Sweden. National statistics in Sweden date back to 1686 when the parishes of the Church of Sweden were ordered to start keeping records on the population. SCB's predecessor, the Office of Tables , was set up in 1749, and the current name was adopted in 1858.As of 2008, the agency had approximately 1,400 employees. The offices of the agency are located in Stockholm and Örebro. Statistics Sweden publishes the Journal of Official Statistics. Wikipedia.

Kallen B.,Lund University | Finnstrom O.,Linkoping University | Nygren K.-G.,IVF and Fertility Clinic | Nygren K.-G.,Karolinska Institutet | Olausson P.O.,Statistics Sweden
European Respiratory Journal

An association between preterm birth and an increased risk of childhood asthma has been demonstrated, but the importance of intrauterine growth retardation on asthma risk is unclear. Using data from Swedish health registers, infant characteristics and childhood asthma were studied. Analyses were made using Mantel-Haenszel methodology with adjustment for year of birth, maternal age, parity, smoking in early pregnancy and maternal body mass index. Preterm birth, birth weight and birth weight for gestational week were analysed and childhood asthma was evaluated from prescriptions of anti-asthmatic drugs. Neonatal respiratory problems and treatment for them were studied as mediating factors. Both short gestational duration and intrauterine growth retardation appeared to be risk factors and seemed to act separately. The largest effect was seen from short gestational duration. Use of mechanical ventilation in the newborn period and bronchopulmonary dysplasia were strong risk factors. A moderately increased risk was also seen in infants born large for gestational age. We conclude that preterm birth is a stronger risk factor for childhood asthma than intrauterine growth disturbances; however, the latter also affects the risk, and is also seen in infants born at term. Source

Kallen B.,Lund University | Finnstrom O.,Linkoping University | Nygren K.-G.,Karolinska Institutet | Otterblad Olausson P.,Statistics Sweden
Pediatric Allergy and Immunology

Background: Maternal use of some drugs, notably paracetamol and drugs for gastroesophageal reflux, has been associated with an increased risk of childhood asthma in the child. We wanted to analyze these associations with consideration to the confounding of maternal asthma. Methods: Childhood asthma was identified from the Swedish National Prescription Register and maternal drug use during the latter part of pregnancy from antenatal records, computerized in the Swedish Medical Birth Register. Risks were estimated as odds ratios (OR) with 95% confidence intervals, using Mantel-Haenszel technique with adjustment for year of birth, maternal age, parity, smoking habits, and BMI. Results: A statistical association between maternal use of many different drugs, including paracetamol, and childhood asthma existed but was mainly due to concomitant drug use, related to maternal asthma. The only associations that appeared to be true were with drugs for gastroesophageal reflux (adjusted (OR) = 1.32, 95% CI, 1.18-1.54) and with opiates (adjusted OR = 1.56 (96% CI, 1.05-2.34). Conclusions: Maternal use of paracetamol did not seem to increase the risk of childhood asthma, but the previously described association with drugs for gastroesophageal reflux was supported. The analysis is complicated by the confounding from maternal asthma. © 2013 John Wiley & Sons A/S. Published by Blackwell Publishing Ltd. Source

Kallen B.,Lund University | Olausson P.O.,Statistics Sweden
BJOG: An International Journal of Obstetrics and Gynaecology

Objective To describe a large study on pregnancy outcome after vaccination against H1N1 during the 2009/10 pandemic. Design A cohort study of women vaccinated with Pandemrix® during pregnancy. Setting The Swedish Medical Birth Register was used for the analysis. Information on vaccination and pregnancy week when vaccination was made was obtained from antenatal care documents. Population All women who gave birth during 2009 and 2010 in Sweden. Methods Characteristics of the vaccinated women and their delivery outcome were compared with two groups of women: women without a known vaccination who gave birth in 2009/10 after 1 October 2009, and women who gave birth during 2009 before 1 October. Adjustment was made for year of delivery, maternal age, parity, smoking habits and body mass index. Outcome measures Stillbirth, congenital malformations, preterm birth, low birthweight, small for gestational age. Results A total of 18 612 vaccinated women having 18 844 infants were studied. The risk for stillbirth, preterm birth and low birthweight was lower than in the comparison groups whereas the risk for small for gestational age and a congenital malformation (after vaccination during the first trimester) did not differ from the comparison groups. No clear-cut explanation to the 'protective' effect of vaccination was found. Conclusions Vaccination during pregnancy with Pandemrix® appeared to have no ill effects on the pregnancy. On the contrary, the rate of preterm birth and low birthweight was lower than expected, which agrees with some previous results. © 2012 The Authors BJOG An International Journal of Obstetrics and Gynaecology © 2012 RCOG. Source

Abbe E.,Ecole Polytechnique Federale de Lausanne | Barron A.,Statistics Sweden
IEEE International Symposium on Information Theory - Proceedings

This paper investigates polar coding schemes achieving capacity for the AWGN channel. The approaches using a multiple access channel with a large number of binary-input users and a single-user channel with a large prime-cardinality input are compared with respect to complexity attributes. The problem of finding discrete approximations to the Gaussian input is then investigated, and it is shown that a quantile quantizer achieves a gap to capacity which decreases like 1/q (where q is the number of constellation points), improving on the 1/log(q) decay achieved with a binomial (central limit theorem) quantizer. © 2011 IEEE. Source

Nilsson P.,Statistics Sweden
Landscape and Urban Planning

Natural amenities play an important role in explaining intra-regional economic growth, because they increase the competition between places and the relative demand for housing. This paper shows that these relationships are strongly location-specific, such that the magnitude and the direction, of value assessments vary across the urban surface. The analysis in this study addresses spatial heterogeneity in the valuations of preserved open space amenities using Swedish house price data. The results show that marginal valuations of open space amenities are high in locations that are characterised by high population and housing densities and low or insignificant in areas where undeveloped lands are abundant, thus, supporting the hypothesis that a greater competition for those, locational attributes that are in high demand, yet locally scarce, results in higher marginal prices. © 2013. Source

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