Equivalency of the diagnostic accuracy of the PHQ-8 and PHQ-9: a systematic review and individual participant data meta-analysis.
Yin WuBrooke LevisKira E RiehmNazanin SaadatAlexander W LevisMarleine AzarDanielle B RiceJill BoruffPim CuijpersSimon GilbodyJohn P A IoannidisLorie A KlodaDean McMillanScott B PattenIan ShrierRoy C ZiegelsteinDickens H AkenaBruce ArrollLiat AyalonHamid R BaradaranMurray BaronCharles H BombardierPeter ButterworthGregory CarterMarcos H ChagasJuliana C N ChanRushina CholeraYeates ConwellJanneke M de Man-van GinkelJesse R FannFelix H FischerDaniel FungBizu GelayeFelicity Goodyear-SmithCatherine G GreenoBrian J HallPatricia A HarrisonMartin HärterUlrich HegerlLeanne HidesStevan E HobfollMarie HudsonThomas HyphantisMasatoshi InagakiNathalie JettéMohammad E KhamsehKim M KielyYunxin KwanFemke LamersShen-Ing LiuManote LotrakulSonia R LoureiroBernd LöweAnthony McGuireSherina Mohd-SidikTiago N MunhozKumiko MuramatsuFlávia L OsórioVikram PatelBrian W PencePhilippe PersoonsAngelo PicardiKatrin ReuterAlasdair G RooneyIná S SantosJuwita ShaabanAbbey SidebottomAdam SimningLesley StaffordSharon SungPei Lin Lynnette TanAlyna TurnerHenk C van WeertJennifer WhiteMary A WhooleyKirsty WinkleyMitsuhiko YamadaAndrea BenedettiBrett D ThombsPublished in: Psychological medicine (2019)
PHQ-8 and PHQ-9 total scores were similar. Sensitivity may be minimally reduced with the PHQ-8, but specificity is similar.