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Samenvatting paper beoordelen / methodologie / P-lijn I

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Een beknopte handleiding voor het systematisch evalueren en kritisch lezen van gepubliceerde klinische studies. Het document biedt een praktisch overzicht van vragen die een lezer moet stellen op basis van de 'W-vragen' (Wanneer, Waar, Wie, Wat, Hoe en Geldig). Er is specifieke aandacht voor het herkennen van rapporteringsbias, de invloed van financiering (funding) , en het corrigeren van confounders in de design- of analysefase van observationeel onderzoek. Tot slot definieert het document de cruciale begrippen interne validiteit (is de getrokken conclusie logisch gekoppeld aan de resultaten?) en externe validiteit (zijn de bevindingen representatief en toepasbaar in de dagelijkse praktijk?).

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PAPER BEOORDELEN
DESIGN VAN KLINISCHE STUDIES

OBSERVATIONELE DESIG N

Cross sectioneel
Cohorte
Case controle
Nested case controle
EXPERIMENTELE DESIGN

Interventie = RCT

COPING W CONFOUNDERS IN OBSERVATIONAL STUDIES
Design phase (irreversibel): specification van ptn and matching van ptn (niet te veel factoren)
Analysis phase (flexibel): stratification and statistical adjustment
Confounders wegwerken
 In RCT: dubbel blind
 in observationele studies (zie hierboven)

PAPER BEOORDELEN
wnr? => wnr gebeurt en gepubliceerd
Waar? => welk tijdschrift, databank  international, peer reviewed journal, impact factor, citaties, journal
Wie? => rapporterings bias = conclusie komt niet overeen met resultaten (slechte validiteit)
 interpretatie
 funding (kan grote invloed hebben)

Wat? => resultaten, inhoud  flow diagram + checklist
Hoe? => methodes, desgin  RCT of observationeel en welke soort
Geldig? => conclusie van resultaten = validiteit
 interne validiteit: uitgeschreven resulaten in paper => resultaten komen overeen met conclusie en titel
 externe validiteit: waarheid buiten de studie => resultaten ook toepasbaar in praktijk + representativiteit van
ptn en settings van studie in praktijk
 indien veel ptn gescreened en te weinig gerandomiseerd = niet representatief in praktijk

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Written in
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