Short Communication

Gissler, Mika; Teperi, Juha; Hemminki, Elina; Meriläinen, Jouni

doi:10.1177/140349489502300113

Cited by 292 publications

(85 citation statements)

References 11 publications

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“…35 The latest Finnish validation study (in 1995) found high validity for cesarean delivery but could not define validity for labor induction. 36 The latest Swedish validation study (in 2001) found that classification of elective vs emergency cesarean delivery was adequate at term gestations but elective cesarean delivery was overestimated for preterm; additional check-boxes have subsequently been added to improve reporting. Validity of the labor induction checkbox, which is marked at the onset of delivery, has not been assessed.…”

Section: Discussionmentioning

confidence: 99%

Temporal Trends in Late Preterm and Early Term Birth Rates in 6 High-Income Countries in North America and Europe and Association With Clinician-Initiated Obstetric Interventions

Richards

Kramer

Deb-Rinker

et al. 2016

JAMA

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Section: Discussionmentioning

confidence: 99%

Temporal Trends in Late Preterm and Early Term Birth Rates in 6 High-Income Countries in North America and Europe and Association With Clinician-Initiated Obstetric Interventions

Richards

Kramer

Deb-Rinker

et al. 2016

JAMA

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“…Most of the register content corresponds well or satisfactorily with hospital record data according to two data quality studies. 20,21 …”

Section: Methodsmentioning

confidence: 99%

Maternal Smoking During Pregnancy and the Risk of Psychiatric Morbidity in Singleton Sibling Pairs

Ekblad

Lehtonen

Korkeila

et al. 2017

Nicotine &Amp; Tobacco Research

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Introduction:Maternal smoking during pregnancy has been associated with an increased risk for psychiatric morbidity. We further studied this with Finnish siblings to control for genetic/familial factors.Methods:From the Finnish Medical Birth Register, sibling pairs were selected as the first two children born 1987–1995 to the same mother (n = 150 168 pairs), along with information on maternal smoking (no smoking/smoking). Information on the children’s psychiatric diagnoses related to outpatient care visits (1998–2013) and inpatient care (1987–2013), and the mothers’ psychiatric morbidity (1969–2013) was derived from the Finnish Hospital Discharge Register. The first pair analysis compared siblings of mothers who only smoked in the first pregnancy (Quitters, 4.7%) and mothers who smoked in both pregnancies (Smokers, 9.6%); the second analysis included mothers who smoked only in the second pregnancy (Starters, 3.3%) and mothers who did not smoke in either pregnancy (Nonsmokers, 77.5%). Smoking information was missing for 5.0% of pairs. Psychiatric morbidity of the siblings and mother was included in the statistical analyses.Results:The risk of psychiatric diagnoses was significantly lower for the second child of quitters (adjusted OR 0.77, 95% CI 0.72–0.83) compared to the risk among smokers. A higher risk for psychiatric diagnoses was found for the second child of starters (1.39, 1.30–1.49) compared to the risk among nonsmokers. The effect of smoking was more robust for externalizing diagnoses.Conclusions:Maternal smoking was independently associated with a higher risk for psychiatric morbidity in children, even when controlling thoroughly for genetic and familial factors.Implications:Maternal smoking during pregnancy has an independent effect on the risk of psychiatric morbidity in children, even after controlling for non-measurable genetic/familial factors by using a sibling pair design. The effect of maternal smoking was robust for externalizing diagnoses. Maternal smoking during pregnancy had an effect on diagnoses both in outpatient and inpatient care.

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“…Previously it has been shown that the information on occupation in the FMBR is of high quality. A study which compared the information in medical records and FMBR showed that there was a 95% agreement for the information on occupation (31). …”

Section: Methodsmentioning

confidence: 99%

Maternal socio-economic status based on occupation and autism spectrum disorders: A national case–control study

Lehti

Hinkka‐Yli‐Salomäki

Cheslack‐Postava

et al. 2015

Nordic Journal of Psychiatry

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Background The association between parental socioeconomic status (SES) and autism spectrum disorders (ASD) has been studied in several countries, but the results have been contradictory. Aims The aim of this study was to examine the association between maternal SES and subtypes of ASD in Finland. Methods A national case-control study was conducted. Children born in 1991–2005 and diagnosed with ASD by the year 2007 were identified from the Finnish Hospital Discharge Register (FHDR). Their matched controls were selected from the Finnish Medical Birth Register (FMBR). There were 3468 cases and 13 868 controls. The information on maternal SES was collected from the FMBR and categorised into upper white collar workers (referent), lower white collar workers, blue collar workers and “others” consisting of students, housewives and other groups with unknown SES. The statistical test used was conditional logistic regression. Results The likelihood of ASD was increased among offspring of mothers who belong to the group “others” (adjusted OR 1.2, 95% CI 1.009–1.3). The likelihood of Asperger’s syndrome was decreased among offspring of lower white collar workers (0.8, 0.6–0.9) and blue collar workers (0.6, 0.5–0.7). The likelihood of PDD-NOS was increased among offspring of blue collar workers (1.5, 1.2–1.9) and “others” (1.3, 1.1–1.7). No association was found between maternal SES and childhood autism. Conclusions The association between maternal SES and ASD differs by ASD subtype. Socioeconomic groups might differ from each other by risk factors for ASD subtypes or by their service use.

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Short Communication

Cited by 292 publications

References 11 publications

Temporal Trends in Late Preterm and Early Term Birth Rates in 6 High-Income Countries in North America and Europe and Association With Clinician-Initiated Obstetric Interventions

Temporal Trends in Late Preterm and Early Term Birth Rates in 6 High-Income Countries in North America and Europe and Association With Clinician-Initiated Obstetric Interventions

Maternal Smoking During Pregnancy and the Risk of Psychiatric Morbidity in Singleton Sibling Pairs

Maternal socio-economic status based on occupation and autism spectrum disorders: A national case–control study

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