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Table 4 Negative correlations among hand strength, functional ability, activity, and duration of disease in the rheumatoid arthritis group (RAG)

From: Hand strength in patients with RA correlates strongly with function but not with activity of disease

Variables Handgrip 2-point tip-to-tip pinch 3-point pinch Lateral pinch
D E D E D E D E
HAQ 0.585* 0.528* 0.446* 0.472* 0.505* 0.501* 0.470* 0.555*
DASH 0.606* 0.559* 0.453* 0.444* 0.484* 0.486* 0.444* 0.535*
CHFS 0.606* 0.512* 0.452* 0.448* 0.496* 0.474* 0.474* 0.509*
Length of disease 0.168 0.196** 0.171 0.204** 0.189** 0.217** 0.187** 0.238*
DAS28 0.431* 0.401* 0.473* 0.436* 0.467* 0.424* 0.341* 0.336*
  1. HAQ: Health Assessment Questionnaire; DASH: Disabilities Arm, Shoulder, and Hand; CHFS: Cochin Hand Functional Scale. Pearson’s correlation test for DAS28; Spearman’s correlation test for all others; * P < 0.01, ** P < 0.05