FIHOA score was negatively associated with grip and pinch hand strength and EQ-5D and positively correlated to VAS pain (p < 0.05 for all). There were significant differences of grip and pinch strength, VAS pain, EQ-5D index, and EQ-VAS between two FIHOA groups (≤ 4 vs. > 4) (p < 0.05 for all). Multivariate logistic regressionanalysis showed that higher FIHOA score (FIHOA > 4) was related with increased VAS pain and with lower EQ-5D index (p = 0.008 and p = 0.013, respectively). There was no association between FIHOA score and measures of total radiographic severity score and number of affected joints.
Conclusion:
This study observes that FIHOA score is associated with patient-reported VAS pain, handmuscle strength indexes, and EQ-5D but not radiographic severity in hand OA.