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PubMed2005

Cost-effectiveness of formoterol and salbutamol as asthma reliever medication in Sweden and in Spain.

This study aimed to evaluate the cost-effectiveness of formoterol (Oxis) Turbuhaler 4.5 microg and salbutamol 200 microg as reliever medications in Sweden and Spain. The study used data on effectiveness (exacerbations and symptom-free days) and resource utilisation from an open, 6-month, parallel-group, multicentre randomised trial with 18,124 asthma patients in 24 countries. Country-specific unit costs for Sweden and for Spain were used to transform resource utilisation data into costs. Total healthcare costs were not significantly different between formoterol and salbutamol dry powder inhalers in Sweden, whereas in Spain, the healthcare costs were 20% higher for formoterol vs. salbutamol pressurised metered dose inhalers. Total healthcare costs increased with disease severity, defined according to the Global Initiative for Asthma guidelines. Compared with salbutamol, formoterol produced statistically significant improvements in effectiveness, less reliever and maintenance medication usage, reduced healthcare resource utilisation, with no increase or a limited increase in healthcare cost.

Administration, Inhalation↗
PubMed1992

Conjunctival malignant melanoma in Sweden 1969-91.

Clinical information, follow-up and histopathological parameters of the primary lesions were assessed for all (45) individuals with conjunctival malignant melanomas in Sweden presenting during a 22.5 year period (1969 to mid 1991). The annual incidence of conjunctival malignant melanoma in Sweden was 0.0240 per 100,000. On average, two new cases were diagnosed each year (population 8.6 million in 1991). Sixty-two per cent of the lesions recurred, but re-growth in itself was not correlated to reduced survival. The actuarial 10-year survival proportion using life-table analysis was 70%. A significantly reduced survival due to tumour-related death was noted in patients with tumours with high mitotic indices, many epithelioid cells and in lesions exceeding 10 mm in diameter. Other factors that may influence survival are presented in the context of previous reports. The present policy in Sweden for treating patients with malignant melanoma of the conjunctiva is outlined and discussed.

Adult↗
PubMed2026

Genomic Medicine Sweden: Advancing precision medicine at the national level.

High-throughput sequencing has transformed clinical diagnostics of rare diseases (RD), cancer and infectious diseases by enabling the identification of disease-causing genetic alterations and facilitating individualised treatment and care. In response to these advances, Genomic Medicine Sweden (GMS) was established in 2017 as a national collaborative effort to accelerate implementation of genomics-based precision medicine within Sweden's regionally organized, publicly funded healthcare system. GMS brings together the seven university healthcare regions and their associated medical faculties, in collaboration with healthcare regions across Sweden, Science for Life Laboratory, patient organizations, industry and governmental agencies. Activities are coordinated through national disease-specific expert groups, supported by cross-cutting functions in bioinformatics, health economics, ethics, education and patient engagement. At the operational level, seven Genomic Medicine Centres, embedded at university hospitals, develop and deliver harmonised genomic diagnostics nationwide. The National Genomics Platform provides secure infrastructure for large-scale data storage, analysis, and national and international data sharing. Following initial project-based funding, GMS now receives long-term governmental support. This review describes the national implementation of genomic-based precision diagnostics, discusses challenges and lessons learnt, and highlights key milestones across disease areas, including whole-genome sequencing in RD and paediatric cancer, comprehensive genomic profiling of haematological malignancies and solid tumours, pathogen genomics in microbiology, pharmacogenomic testing and emerging applications of polygenic risk scores in complex diseases. Collectively, these efforts have contributed to more than 500,000 genomic tests being performed within Swedish healthcare between 2017 and 2025. Finally, we outline future diagnostic needs and priority areas to ensure sustainable, scalable and equitable access to precision medicine.

Precision Medicine↗
PubMed1995

Molecular epidemiological studies of Mycobacterium bovis infections in humans and animals in Sweden.

Forty-nine isolates of Mycobacterium bovis from humans and animals in Sweden were analyzed by restriction fragment length polymorphism (RFLP) patterns probed by the insertion element IS6110. Most isolates had patterns indicating the presence of only one or two genomic copies of the IS6110 insertion element. This simple type of pattern was found in all human isolates. In contrast, isolates from M. bovis infections in five herds of farmed deer in Sweden showed a specific RFLP pattern with seven bands, indicating seven copies of the IS6110 sequence. In 1958, Sweden was declared free from M. bovis in cattle. However, in 1987, M. bovis was reintroduced with imported farmed deer, and since 1991, 11 outbreaks in deer herds, but not in other livestock or wildlife, have been diagnosed. Continued RFLP studies of the new Swedish M. bovis isolates can reveal possible transmission of this deer strain to other animals or humans.

Animals↗
PubMed2006

SIDS risk factors and factors associated with prone sleeping in Sweden.

OBJECTIVE: To compare the current prevalence of risk factors for sudden infant death syndrome (SIDS) in Sweden with a decade earlier, and assess factors associated with prone sleeping. METHODS: The results of a cohort study (Infants of Western Sweden) and a population based case-control study (Nordic Epidemiological SIDS Study) were examined. Subjects were 5600 healthy 6 month old infants born in 2003 in the Western Sweden region and 430 healthy Swedish infants born between 1991 and 1995. RESULTS: Prone sleeping decreased from 31.8% to 5.6% and supine sleeping increased from 35.3% to 47.3%. Side or side/supine sleeping increased from 25.2% to 43.8%. Maternal smoking during pregnancy decreased from 23.5% to 9.5%. The risk for prone sleeping increased if the mother was unemployed (OR 2.4, 95% CI 1.5 to 4.0), if she was a heavy smoker in the third trimester (OR 44.1, 95% CI 1.6 to 1199.6), and if the child was irritable (OR 2.5, 95% CI 1.3 to 5.1), shared a bedroom with siblings (OR 2.6, 95% CI 1.0 to 6.6), or never used a dummy (OR 3.2, 95% CI 1.9 to 5.4). CONCLUSIONS: Parents have complied with advice to prevent SIDS given at infant welfare centres for the last 10 years. A change in the preferred sleeping position from side variants to exclusively supine, and reducing the number of pregnant women smoking may be beneficial. Use of a prone sleeping position was associated with maternal employment status, maternal smoking, temperament of the child, dummy use, and sharing a bedroom with siblings.

Bottle Feeding↗
PubMed2004

Increase of regional total cancer incidence in north Sweden due to the Chernobyl accident?

STUDY OBJECTIVE: Is there any epidemiologically visible influence on the cancer incidence after the Chernobyl fallout in Sweden? DESIGN: A cohort study was focused on the fallout of caesium-137 in relation to cancer incidence 1988-1996. SETTING: In northern Sweden, affected by the Chernobyl accident in 1986, 450 parishes were categorised by caesium-137 deposition: < 3 (reference), 3-29, 30-39, 40-59, 60-79, and 80-120 kiloBecquerel/m(2). PARTICIPANTS: All people 0-60 years living in these parishes in 1986 to 1987 were identified and enrolled in a cohort of 1 143 182 persons. In the follow up 22 409 incident cancer cases were retrieved in 1988-1996. A further analysis focused on the secular trend. MAIN RESULTS: Taking age and population density as confounding factors, and lung cancer incidence in 1988-1996 and total cancer incidence in 1986-1987 by municipality as proxy confounders for smoking and time trends, respectively, the adjusted relative risks for the deposition categories were 1.00 (reference < 3 kiloBecquerel/m(2)), 1.05, 1.03, 1.08, 1.10, and 1.21. The excess relative risk was 0.11 per 100 kiloBecquerel/m(2) (95% CI 0.03 to 0.20). Considering the secular trend, directly age standardised cancer incidence rate differences per 100 000 person years between 1988 to 1996 and the reference period 1986-1987, were 30.3 (indicating a time trend in the reference category), 36.8, 42.0, 45.8, 50.1, and 56.4. No clear excess occurred for leukaemia or thyroid cancer. CONCLUSIONS: Unless attributable to chance or remaining uncontrolled confounding, a slight exposure related increase in total cancer incidence has occurred in northern Sweden after the Chernobyl accident.

Adolescent↗
PubMed1996

The sociodemographic pattern of tobacco cessation in the 1980s: results from a panel study of living condition surveys in Sweden.

STUDY OBJECTIVES: To analyse the factors that determined whether or not people were successful in quitting tobacco during the 1980s in Sweden. DESIGN: A logistic regression model was used for the analyses and included: education, marital status, socioeconomic group, social network, physical activities, cigarette consumption, and years spent smoking as independent variables. Men and women were analysed separately for smoking. A specific univariate analysis was also performed for men who used snuff. SETTING: Sweden. PARTICIPANTS: A panel of 5104 randomised people aged 16-84 years was interviewed in 1980-81 and followed up in 1988-89 in the survey of living conditions undertaken by Statistics Sweden. The participation rate was 86%. The panel included 1546 men and women who were daily smokers. There were 418 daily users of snuff among the men, and 129 men both smoked and used snuff. MAIN RESULTS: Together 26% of women and 23% of men had quit smoking. Five percent in both groups were new smokers. Among men, 26% had quit using snuff and 5% had begun smoking. New snuff users among men were 5%. In the multivariate analysis, unmarried men kept smoking at significantly higher rates (OR 2.1; 95% CI 1.2,3.6), as did those men who smoked 11-20 cigarettes/day (OR 2.2; 95% CI 1.5, 3.4), or more than 20 cigarettes/day (OR 2.8; 95% CI 1.4,5.7). Among women, smoking 11-20 cigarettes/day was also a significant factor (OR 3.3; 95% CI 2.1,5.0). Men and women aged 25-44 were significantly more likely to continue smoking (OR = 2.1; 95% CI 1.1,3.7, and 2.2; 95% CI 1.2,4.4) as were those who had smoked for 20 years or more (OR 4.7; 95% CI 2.0,10.8 and OR 2.5; 95% CI 1.1,5.5, respectively). For women, low education (up to grade 9) was also a significant factor (OR = 2.5; 95% CI 1.2,5.1). Among men who had quit using snuff we did not find any values of significance. CONCLUSIONS: One in four smokers had quit during the 1980s and a few started smoking (5%). Some men quit smoking and started using snuff instead. For both sexes, the daily consumption of cigarettes, years spent smoking, and age were the most important determinants of successful quitting. In men, being married/ cohabiting was an important factor as was higher education in women.

Adolescent↗
PubMed1997

Factors associated with birth weight in Sweden: the study of men born in 1913.

STUDY OBJECTIVE: To analyse factors associated with birth weight and to evaluate the validity of obstetrical data. DESIGN: Obstetrical data were retrieved for singleton men born in 1913 and living in Gothenburg, Sweden in 1963. Information on birth weight, maternal age, marital status, parity, social class, proteinuria, gestational age, and place of birth (home or hospital) was obtained from these birth records. SETTING: Sweden. PARTICIPANTS: Fifty year old men living in Gothenburg, Sweden, in 1963. MAIN RESULTS: Obstetrical records were obtained for 524 men (65%). Place of birth, gestational age, maternal age, parity, proteinuria, and marital status were all significantly correlated to birth weight. In multivariate analyses, place of birth, gestational age, parity, and proteinuria influenced birth weight. There was a substantial difference in mean birth weight between hospital deliveries (3352 g) and home deliveries (3817 g), which could be explained only partly by sociodemographic variables. Birth weight increased with parity and gestational age in home delivered babies as well as those delivered in a hospital. CONCLUSIONS: The validity of obstetrical records from 1913 was good. The place of birth (home or hospital) is strongly associated with birth weight and may be a confounding factor in studies of the implications of birth weight for future risk of disease or death.

Aged↗
PubMed1997

Self reported poor health and low educational level predictors for mortality: a population based follow up study of 39,156 people in Sweden.

OBJECTIVE: To analyse the relative risk (RR) of mortality for people who reported poor health or had low educational level. SETTING: Sweden. DESIGN: A random sample of 39156 people was interviewed face to face by Statistics Sweden from 1979-85. The dependent variable was total mortality. Independent variables were sex, age, marital status, and socioeconomic position, defined as educational level, type of housing tenure, and health status. This study was designed as a follow up study ranging from 1 January 1979 to 31 December 1993. Information on the dependent variables was obtained from the central cause of death register. Respondents were linked to the register by the Swedish personal registration number. Person-years at risk were calculated from the date of the interview until death, or for those who survived, until the end of the follow up period. Data were analysed in relation to gender and age (25-29 years and 60-74 years) in a proportional hazard model in order to estimate RR. RESULTS: During follow up 2656 men and 1706 women died. Men and women in both age groups who reported poor health status at the interview had a strongly increased risk of dying during the follow up period (RR = 2.05 (95% confidence interval 1.72, 2.31) and RR = 1.91 (1.74, 2.10) for men, and RR = 2.34 (1.94, 2.83) and RR = 1.80 (1.61, 2.02) for women for the younger and older age groups respectively) when simultaneously controlled for age, marital status, education, and housing tenure. Living alone, renting an apartment, and low educational level (< or = 9 years) were also associated with increased mortality risks for men and women in both age groups. CONCLUSION: Poor self reported health was a strong predictor for total mortality. Furthermore, in Sweden, a country well known for the equality of its income distribution, there are inequalities in health with higher total mortality risks for people with a low educational level and those who are not owner-occupiers.

Adult↗
PubMed1999

Lone mothers in Sweden: trends in health and socioeconomic circumstances, 1979-1995.

STUDY OBJECTIVE: To study trends in the health and socioeconomic circumstances of lone mothers in Sweden over the years 1979-1995, and to make comparisons with couple mothers over the same period. DESIGN: Analysis of data from the annual Survey of Living Conditions (ULF), conducted by Statistics Sweden from 1979-1995. Comparison of demographic, socioeconomic and health status of lone and couple mothers and how these have varied over the 17 years of the study. Main outcome measures include prevalence of self perceived general health and limiting longstanding illness. PARTICIPANTS AND SETTING: All lone mothers (n = 2776) and couple mothers (n = 16,935) aged 16 to 64 years in a random sample of the Swedish population in a series of cross sectional surveys carried out each year between 1979 and 1995. MAIN RESULTS: The socioeconomic conditions of lone mothers deteriorated during the period 1979-1995, with increasing unemployment and poverty rates. Lone mothers had worse health status than couple mothers throughout the period. In comparison with the first two periods, the prevalence of less than good health increased among both lone and couple mothers from the late 1980s onwards. For lone and couple mothers who were poor, their rates of less than good health were similar in the early 1980s, but in 1992-95 poor lone mothers were significantly more likely to report less than good health than poor couple mothers. Unemployed lone mothers had particularly high rates of ill health throughout the study period. CONCLUSIONS: As in other European countries, lone mothers are emerging as a vulnerable group in society in Sweden, especially in the economic climate of the 1990's. While they had very low rates of poverty and high employment rates in the 1980s, their situation has deteriorated with the economic recession of the 1990's. The health status of lone mothers, particularly those who are unemployed or poor, appears worse than that of couple mothers and in some circumstances may be deteriorating. Further study is needed to elucidate the mechanisms mediating their health disadvantage compared with couple mothers.

Adolescent↗
PubMed2001

Ethnic differences in self reported health in Malmö in southern Sweden.

STUDY OBJECTIVE: The aim of this study was to investigate ethnic differences in self reported health in the city of Malmö, Sweden, and whether these differences could be explained by psychosocial and economic conditions. DESIGN/SETTING/PARTICIPANTS: The public health survey in Malmö 1994 was a cross sectional study. A total of 5600 people aged 20-80 years completed a postal questionnaire. The participation rate was 71%. The population was categorised according to country of origin: born in Sweden, other Western countries, Yugoslavia, Poland, Arabic speaking countries and all other countries. The multivariate analysis was performed using a logistic regression model in order to investigate the importance of possible confounders on the differences by country of origin in self reported health. Finally, variables measuring psychosocial and economic conditions were introduced into the model. MAIN RESULTS: The odds ratios of having poor self reported health were significantly higher among men born in other Western countries, Yugoslavia, Arabic speaking countries and in the category all other countries, as well as among women born in Yugoslavia, Poland and all other countries, compared with men and women born in Sweden. The multivariate analysis including age and education did not change these results. A huge reduction of the odds ratios was observed for men and women born in Yugoslavia, Arabic speaking countries and all other countries, and for women born in Poland after the introduction of the social network, social support and economic factors into the multivariate model. CONCLUSIONS: There were significant ethnic group differences in self reported health. These differences were greatly reduced by psychosocial and economic factors, which suggest that these factors may be important determinants of self rated health in certain minority groups.

Adult↗
PubMed2001

Service screening with mammography of women aged 50-69 years in Sweden: effects on mortality from breast cancer.

OBJECTIVES: To estimate the effect of the population based service screening programme in Sweden on mortality from breast cancer among women aged 50-69. SETTING; In 1986, population based service screening with mammography started in Sweden, and by 1997 screening had been introduced in all counties. Half of the counties invite women from 40 years of age whereas women 50 and older are invited in the other counties. The upper age limit was either 69 or 74. Women in the age group 50-69 years are thus invited to screening in all counties. METHODS: The counties which started with mammographic screening in 1986-87 constituted the study group and were compared with the counties which started in 1993 or later. In 1987 the mean number of women aged 50-69 was 161,986 and 98,608 in the study and control groups, respectively. Refined excess mortality (smoothed with the Lowess method) from breast cancer and refined cause specific mortality from breast cancer were used as effect measures. To adjust for geographical differences in mortality from breast cancer a reference period was used. Allowance was made for two potential biases: (a) inclusion bias implying the inclusion of cases diagnosed before invitation to screening in the first screening round, and (b) lead time bias. RESULTS: After a mean follow up time of 10.6 years since the start of screening and a mean individual follow up time of 8.4 years, a non-significant reduction in refined excess mortality for breast cancer was estimated as relative risk (RR) 0.84 (95% confidence interval (95% CI) 0.67 to 1.05). After adjustment for inclusion and lead time biases the RR was 0.80 (20% reduction). Only 27% of the deaths from breast cancer in the total mortality for women aged 50-79 at death consisted of women aged 50-69 at diagnosis who were diagnosed after the start of screening. This figure has important implications for judgement of the impact of screening on age specific national breast cancer mortalities. CONCLUSIONS: A non-significant reduction in mortality from breast cancer was found in counties performing service screening with mammography in Sweden. Adjustment for possible biases changed the result towards a larger effect of screening. The results do not contradict the effects found in the Swedish randomised mammography trials.

Aged↗
PubMed1997

Increased risk of lung cancer among male professional drivers in urban but not rural areas of Sweden.

OBJECTIVES: To study the risk of lung cancer in different subgroups of professional drivers in urban and rural areas of Sweden. METHODS: Information on occupation and geographical region was obtained from the Swedish census of 1970 and data on the incidence of lung cancer between 1971 and 1984 from the National Swedish Cancer Registry. Professional drivers were separated into bus, taxi, and long and short distance lorry drivers. Comparisons of cumulative incidence of lung cancer were made between each particular group of drivers and gainfully employed men in the same region. RESULTS: Taxi drivers, and long and short distance lorry drivers in Stockholm County showed increased relative risks (RRs) of lung cancer with the highest risk among the short distance lorry drivers (RR 2.0, 95% confidence interval (95% CI) 1.5 to 2.6). These categories of drivers also showed increased risks in the other two large conurbations in Sweden. In the rest of the country (mainly rural areas) there were no increased RRs for any category of driver. The RR for bus drivers was not increased in any region. After adjustment for assumed differences in smoking habits the RRs remained significantly increased for lorry drivers in Stockholm but not for other groups of drivers in other areas. However, the RRs remained numerically higher in large conurbations than in rural regions for all groups of drivers. CONCLUSIONS: These findings suggest that some factors present in the urban environment play a substantial part in the excess of lung cancer among short distance lorry drivers in urban areas of Sweden. Exposure to motor exhaust fumes may have contributed to this excess.

Adult↗
PubMed1988

Population studies in northern Sweden. XV. Transferrin C subtypes.

The frequencies of transferrin C (TF C) subtypes were studied in 315 Finns, 222 Swedish Lapps and in 4,157 conscripts and blood donors from the counties of Norrbotten and Västerbotten in northern Sweden. The Swedish individuals were distributed according to place of birth into 23 subpopulations or regions. A significant heterogeneity between the 23 regions was observed for the TF C1, C2 and C3 genes and for rare genes. Clines were found for the TF C1 and C3 genes and for rare transferrin genes in northern Sweden. The frequencies of the C1 and C3 genes were increasing in the southwestern and northeastern direction, respectively, and the frequency of the rare transferrin genes was increasing in the northern direction. The geographical picture of the C3 gene and of rare transferrin genes could be interpreted in terms of Finnish influence. The frequency of the TF C3 gene in Finland and northern Sweden (14 and 15%) is the highest so far reported in the world. The overall picture of geographical variations of the C1 and C2 genes were not explainable in terms of ethnic influence and may be caused by random differentiation and/or selective forces.

Finland↗
PubMed1990

Transferrin C subtypes and ethnic heterogeneity in Sweden.

Transferrin (TF) C subtypes were studied in Swedish Lapps (Saami) and in Swedes from northern, central and southern Sweden, and the allele frequencies were compared with those in other European populations. The Swedish Lapps were found to have the lowest frequency of the TF*C3 allele (1-2%) so far observed in Europe. Most European populations have TF*C3 allele frequencies between 5 and 7%. Finns differ by having high TF*C3 frequencies (13-14%). The relatively high TF*C3 frequencies found in northeastern Sweden (13%) and in central Sweden (9%) are most likely due to eastern influence. Unlike other genetic markers of eastern influence (e.g. TF*DCHI), which are of Asiatic Mongoloid origin, TF*C3 appears to originate from Finno-Ugric populations.

Alleles↗
PubMed1990

Epidemiological study of Hodgkin's disease in Cuba and Sweden.

In this register study the epidemiologic features of Hodgkin's disease (HD) in Cuba and Sweden during 1964-1981 are compared. HD in the adult (greater than or equal to 15 years of age) is more common in Sweden than in Cuba (age-standardized incidence rate 3.6 X 10(5) vs. 3.1 X 10(5) but for childhood HD the opposite is true (2.1 X 10(5) vs. 3.0 X 10(5). In both countries a male predominance is found. A decrease in the incidence of HD is noted only in the Swedish population after 1973. The study reveals a stable bimodal age incidence pattern in Sweden but a shift from a linear increasing to a bimodal incidence pattern in Cuba, which parallels the Cuban development from an agricultural to an industrialized country.

Adolescent↗
PubMed1993

Integrated caries prevention: effect of a needs-related preventive program on dental caries in children. County of Värmland, Sweden: results after 12 years.

Twenty years ago the caries prevalence in Swedish children was among the highest in the world; within Sweden, it was highest in the County of Värmland. Ongoing clinical research projects were initiated to evaluate the separate and combined effects of preventive measures, and in 1978 a preventive program, based on caries risk assessment, was introduced for 3- to 19-year-olds in the county. The effects were monitored by a computerized epidemiological system. From 1979 to 1991, caries prevalence and incidence decreased by 75-90 and 75-85%, respectively. The percentage of caries-free 3-year-old children increased from 51 to 94%, and in 12-year-old children, the caries prevalence decreased from 6.5 to 1.0 DFS, the lowest in Sweden. The program is very cost-effective, and in 1990 the mean annual treatment time per child was the lowest in Sweden. Currently, new methods of caries risk prediction and integrated caries prevention are being developed, with special reference to cost-effectiveness.

Adolescent↗
PubMed1997

Female and male sterilization and refertilization in Sweden.

In Sweden, approximately 1,500 men and 7,000 women are sterilized yearly. The frequency varies considerably between regions. The reasons for these differences are not fully known. More women than men are sterilized in Sweden, but a higher proportion of sterilized men undergo refertilization. The object of the study was to analyze counselling routines prior to sterilization, presterilization waiting time, the number of refertilizations performed, the attitudes of the operating departments towards refertilization, and the possible relation between frequency of refertilization and incidence of sterilization. A questionnaire was mailed to all units performing refertilizations and/or sterilizations of mean and women in Sweden (n = 161). The response was 93%. Counselling routines and waiting times before sterilization varied, which influenced the operation's availability. The frequency of refertilizations varied considerably between counties from 0.5 to 5.4 per 100,000 inhabitants. There was no correlation between frequency of sterilizations and refertilizations. The rate of refertilization appears to be determined mostly by the local attitudes of the health authority. The Swedish sterilization law has had a heterogeneous impact in the country.

Adult↗