The Oslo Health Study: The impact of self-selection in a large, population-based survey

Søgaard, Anne Johanne; Selmer, Randi; Bjertness, Espen; Thelle, Dag S.

doi:10.1186/1475-9276-3-3

Cited by 415 publications

(436 citation statements)

References 40 publications

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“…Participants were older and more likely to have a high education, and more women than men participated [33]. This conforms well with other studies, which have found that participation rates generally increase with age, female gender and higher education level [65]. The difference between respondents and non-respondents presents a socio-economic gradient that may have influenced the prevalence estimates of interpersonal violence and adult mental health problems.…”

Section: Discussionsupporting

confidence: 85%

Childhood violence and mental health among indigenous Sami and non-Sami populations in Norway: a SAMINOR 2 questionnaire study

Hansen

Schei

Sørlie

et al. 2018

International Journal of Circumpolar Health

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The main objectives of this study were to investigate the association between childhood violence and psychological distress and post-traumatic stress symptoms (PTS) among Sami and non-Sami adults, and to explore a possible mediating effect of childhood violence on any ethnic differences in mental health. This study is part of a larger questionnaire survey on health and living conditions in Mid- and Northern Norway (SAMINOR 2) which included 2116 Sami and 8674 non-Sami participants. A positive association between childhood violence and psychological distress and PTS in adulthood was found regardless of ethnicity. For women, childhood violence may have mediated some of the ethnic differences in psychological distress (53.2%) and PTS (31.4%). A similar pattern was found for men as to psychological distress (45.5%) and PTS (55.5%). The prevalence of psychological distress was significantly higher in the Sami than in the non-Sami group: 15.8% vs. 13.0% for women, and 11.4% vs. 8.0% for men. Likewise, PTS showed a higher prevalence in the Sami group, both for women (16.2% vs. 12.4%) and for men (12.2% vs. 9.1). Conclusion: A positive association between childhood violence and adult mental distress was found for both Sami and Norwegian adults. More mental problems were found among the Sami. Childhood violence may have mediated some of the ethnic differences.

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Section: Discussionsupporting

confidence: 85%

Childhood violence and mental health among indigenous Sami and non-Sami populations in Norway: a SAMINOR 2 questionnaire study

Hansen

Schei

Sørlie

et al. 2018

International Journal of Circumpolar Health

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“…The response rate was, however, low, which may have induced a selection bias and reduced the external validity. However, a Norwegian study on non-responders found no evidence of major systematic errors [23]. This study had many parallels with our study with regard to time, design, and response rate.…”

Section: Discussionsupporting

confidence: 80%

IgG and IgG4 antibodies in subjects with irritable bowel syndrome: a case control study in the general population

2012

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BackgroundPatients with Irritable Bowel Syndrome (IBS) often relate their symptoms to the intake of food and modify their diet. IgE-mediated food allergy is uncommon in IBS, but the role of IgG-mediated food hypersensitivity remains inconclusive. The primary aim of this study was to compare food- and yeast-specific IgG and IgG4 antibodies in subjects with and without IBS.MethodsThis was a case control study in the general population for which subjects completed questionnaires about abdominal complaints and their intake of common food items. Blood samples were collected, and food- and yeast-specific IgG and IgG4 antibodies were measured. Antibodies were measured in mg/L.ResultsWe included 269 subjects with IBS and 277 control subjects. After correction for subject characteristics and diet, there were no significant differences with regard to food- and yeast-specific IgG and IgG4 antibodies between subjects with IBS and controls. Lower values of IgG antibodies against egg (OR 0.99 (0.98 to 1.00), p = 0.002) and beef (OR 0.75 (0.60 to 0.94), p = 0.012) and higher values of IgG antibodies against chicken (OR 1.14 (1.03 to 1.27), p = 0.009) were associated with more severe symptoms.ConclusionsOur findings suggest that IgG-and IgG4-mediated food and yeast hypersensitivity in IBS is unlikely. IgG antibodies against food and yeast may reflect the diet.

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“…Although the attendance to the health survey was lower than desired, the impact of self-selection in a similar large population-based Norwegian survey was judged to have little impact on the results (Sogaard et al, 2004). The inclusion of only those with IBS and 'alarm symptoms' was done for capacity reasons, and might have induced a bias.…”

Section: Discussionmentioning

confidence: 99%

Perceived food intolerance in subjects with irritable bowel syndrome – etiology, prevalence and consequences

2005

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Objectives: This study estimates the prevalence of perceived food intolerance and its consequences in subjects with irritable bowel syndrome (IBS), evaluates the utility of common tests for food intolerance, studies the relation between perceived food intolerance and other disorders, and discusses the etiology. Design: Cross-sectional study. Setting: National health survey. Subjects: A selection of the population (n ¼ 11078) in Oppland county, Norway, was invited to a health screening, and a sample of subjects with IBS were included in the study. Interventions: A medical history of food intolerance, musculoskeletal pain, mood disorders and abdominal complaints was taken, and tests were performed for food allergy and malabsorption. A dietician evaluated the dietary habits of the subjects. Results: Out of 4622 subjects with adequately filled-in questionnaires, 84 were included in the study, 59 (70%) had symptoms related to intake of food, 62% limited or excluded food items from the diet and 12% had an inadequate diet. The mean numbers of food items related to symptoms and the number of foods limited or excluded from the diet were 4.8 and 2.5, respectively. There were no associations between the tests for food allergy and malabsorption and perceived food intolerance. Perceived food intolerance was unrelated to musculoskeletal pain and mood disorders. Conclusions: Perceived food intolerance is a common problem with significant nutritional consequences in a population with IBS. The uselessness of current antibody tests and tests for malabsorption and the lack of correlation to psychiatric co-morbidity make the etiology obscure.

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The Oslo Health Study: The impact of self-selection in a large, population-based survey

Cited by 415 publications

References 40 publications

Childhood violence and mental health among indigenous Sami and non-Sami populations in Norway: a SAMINOR 2 questionnaire study

Childhood violence and mental health among indigenous Sami and non-Sami populations in Norway: a SAMINOR 2 questionnaire study

IgG and IgG4 antibodies in subjects with irritable bowel syndrome: a case control study in the general population

Perceived food intolerance in subjects with irritable bowel syndrome – etiology, prevalence and consequences

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