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            <r:String xml:lang="sv">SALT - Screening Across the Lifespan Twin Study</r:String>
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Svenska Tvillingregistret</r:String>
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        <r:String xml:lang="sv">STAGE - Study of Twin Adults: Genes and Environment</r:String>
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          <r:String xml:lang="sv">Karolinska Institutet</r:String>
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          <r:String xml:lang="sv">Karolinska Institutet</r:String>
          <r:String xml:lang="en">Karolinska Institutet</r:String>
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        <r:SimpleDate>2025-08-11</r:SimpleDate>
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      <r:Content xml:lang="sv">Mellan 2004 och 2006 genomförde Svenska Tvillingregistret (STR) en nationell datainsamling riktad till tvillingar födda i Sverige mellan 1959 och 1985. Syftet var att studera de vanligaste komplexa sjukdomarna samt att mäta exponeringar som är relevanta under ung vuxenålder och medelålder. Detta var den första studien inom STR där en webbaserad enkät användes som huvudsaklig datainsamlingsmetod.

Målpopulationen omfattade både enäggs- och tvåäggstvillingar, oavsett könskombination, under förutsättning att båda syskonen överlevt minst det första levnadsåret. Totalt kontaktades cirka 43 000 individer. 

Deltagarna inbjöds att besvara en webbenkät som inkluderade frågor om bland annat vanliga hälsoproblem, levnadsvanor och miljöexponeringar, med särskilt fokus på tobaksbruk och rökavvänjningsbeteenden. Som komplement erbjöds även möjlighet att genomföra enkäten via telefonintervju med utbildad intervjuare.
Den totala svarsfrekvensen uppgick till cirka 60 procent, motsvarande drygt 25 000 studiedeltagare.


Följande frågeområden ingår:

ADHD
Alkohol
Allergi och eksem
Artrit
Astma
CESD - Center for Epidemiological Studies Depression
Depression
Epilepsi
EPQ - Eysenck Personality Questionnaire
Fysisk aktivitet
GWAS - Genotypdata
Huvudvärk
IBS - irriterad tarm
Droger
Impulsivitet
Inkontinens/interstitiell cystit
Kaffe och te
Kronisk trötthet
Ledarskap
Medicinsk historia
Menstruations- och reproduktionshistoria
Näring
OCD (tvångssyndrom)
Perfektionism
Prestation
Personlighetsstörning
Reflux
Rökning och snusning
Sexuellt riskbeteende
Smärta
Stressande trauma
Sömnmönster
TCI - Självstyrning
Tics
Tourettes syndrom 
Utbildning och yrke
Utbrändhet
Ångest
Ätstörningar</r:Content>
      <r:Content xml:lang="en">Between 2004 and 2006, the Swedish Twin Registry (STR) conducted a nationwide data collection targeting twins born in Sweden between 1959 and 1985. The purpose was to study the most common complex diseases and to measure exposures relevant during young adulthood and midlife. This was the first study within STR to use a web-based questionnaire as the primary method of data collection.

The target population included both monozygotic and dizygotic twins, of both same-sex and opposite-sex pairs, provided that both twins had survived at least the first year of life. Approximately 43,000 individuals were contacted.

Participants were invited to complete a web-based survey that included questions on, among other topics, common health problems, lifestyle habits, and environmental exposures, with a particular focus on tobacco use and smoking cessation behaviors. As a complement, participants were also offered the opportunity to complete the survey via telephone interview conducted by a trained interviewer.

The overall response rate was approximately 60 percent, corresponding to just over 25,000 study participants.


The following question areas are included:

ADHD 
Alcohol
Allergy and eczema
Anxiety
Arthritis
Asthma
Burnout
CESD - Center for Epidemiological Studies Depression
Chronic fatigue
Coffee and tea
Depression
Eating disorders
Education and occupation
Epilepsy
EPQ - Eysenck Personality Questionnaire
GWAS - Genotype data 
Headache
IBS - irritable bowel syndrome
Illicit drugs
Impulsivity
Incontinence/Interstitial cystitis
Leadership
Medical history
Menstrual and reproductive history
Nutrition
OCD
Pain
Perfectionism
Performance
Personality disorder
Physical activity
Reflux
Sexual risk behavior
Sleep patterns
Smoking and snuffing
Stressful trauma
TCI - Self-directedness
Tics
Tourette's Syndrome</r:Content>
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        <r:Keyword xml:lang="sv" controlledVocabularyID="D004777" controlledVocabularyName="MeSH">Miljö</r:Keyword>
        <r:Keyword xml:lang="en" controlledVocabularyID="D038522" controlledVocabularyName="MeSH">Twinning, Monozygotic</r:Keyword>
        <r:Keyword xml:lang="sv" controlledVocabularyID="D038522" controlledVocabularyName="MeSH">Monozygotisk tvillingbildning</r:Keyword>
        <r:Keyword xml:lang="en" controlledVocabularyID="D000080534" controlledVocabularyName="MeSH">Twinning, Dizygotic</r:Keyword>
        <r:Keyword xml:lang="sv" controlledVocabularyID="D000080534" controlledVocabularyName="MeSH">Dizygotisk tvillingbildning</r:Keyword>
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          <r:EndDate>2007</r:EndDate>
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