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Table 2 Comparison between RA hands with and without different ultrasonographic findings as regards GAT. Cut-off values for MSUS findings to be present: grade 1 synovitis (grade 1 SH and ≤ grade 1 PD signal) or more of any of the mentioned joints, grade 1 or more tenosynovitis of any of the mentioned tendons

From: Value of musculoskeletal ultrasound in assessment of rheumatoid hand function

  GAT (seconds)
Normal: ≤ 20 s
 
Absent Present
Median IQR Median IQR p value
Ulnar 4 PIPJs synovitis 32.5 18.5–75.5 37.0 18.5–69 0.851
Ulnar 4 MCPJs synovitis 27.5 17–47.5 43.5 29.5–92 0.009
Wrist joint synovitis 30.5 17–54 77.5 32–100 0.004
Flexor tendons tenosynovitis of the ulnar 4 fingers 30.5 18–60 52.0 34–147 0.042
Extensor tendons tenosynovitis of the ulnar 4 fingers 32.5 19–74 40.5 17–100 0.758
Tenosynovitis of EPL, EPB, APL, and FPL 30.0 18–59 75.0 40–120 0.005
FPL tendon tenosynovitis 33.0 18–74 37.0 31–147 0.396
FCU, ECU, FCR, ECRL, and ECRB tendons tenosynovitis 32.0 18–76 37.0 23–74 0.854
  1. Bold, < 0.05
  2. P level of significance, GAT grip ability test, IQR interquartile range, MCP metacarpophalangeal, MCPJs metacarpophalangeal joints, PIPJs proximal interphalangeal joints, APL abductor pollicis longus, EPL extensor pollicis longus, EPB extensor pollicis brevis, FPL flexor pollicis longus, FCU flexor carpi ulnaris, ECU extensor carpi ulnaris, FCR flexor carpi radialis, ECRL extensor carpi radialis longus, ECRB extensor carpi radialis brevis