Conversion of the MDHAQ to the HAQ score: a simple algorithm developed and validated in a cohort of 13 391 real-world patients.
Lykke Midtbøll ØrnbjergElisabeth SvenssonKatja LøngaardRikke H MeinckeJens Kristian PedersenLene DreyerNiels Steen KroghDorte V JensenMerete Lund HetlandPublished in: Rheumatology (Oxford, England) (2022)
This study suggests that in observational datasets with only the MDHAQ available, a simple algorithm allows valid conversion to HAQ on the group level in RA, PsA and axSpA.