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Table 5 Influence of IP baseline characteristics on ultrasound parameters in men and women

From: Influence of Inflammatory Polyarthritis on Quantitative Heel Ultrasound Measurements

  Broadband attenuation Speed of sound
  (dB/MHz) (m/s)
  βcoeff (95% Cl)a βcoeff (95% Cl)a
Symptom duration1 (years) 0.3 (−0.7, 1.2) −0.7 (−3.2, 1.7)
Rheumatoid Factor+   
no Referent Referent
yes −4.0 (−9.8, 1.9) −4.9 (−19.7, 10.0)
Tertiles of swollen joint count   
low Referent Referentb
mid −4.1 (−10.8, 2.7) −6.3 (−23.2, 10.7)
high −6.0 (−12.2, 0.1) −20.1 (−35.6, -4.6)*
Tertiles of tender joint count   
low Referent Referent
mid 2.4 (−4.3, 9.1) −4.3 (−21.1, 12.6)
high −1.9 (−8.5, 4.7) −13.3 (−29.9, 3.3)
Tertiles of both swollen & tender joint count   
low Referent Referentb
mid −6.4 (−12.7, -0.2)* −13.7 (−29.6, 2.2)
high −5.3 (−12.0, 1.4) −16.1 (−33.1, 0.9)
Larsen score2 0.1 (−0.2, 0.3) −0.1 (−1.0, 0.7)
Erosions2   
no Referent Referent
yes 0.9 (−8.3, 10.0) 8.2 (−23.3, 39.7)
Satisfied ARA criteria (4/7 definition)   
no Referent Referent
yes −7.8 (−13.4, -2.3)* −18.9 (−33.1, -4.8)*
Satisfied ARA criteria (tree definition)   
no Referent Referent
yes −8.5 (−13.7, -3.2)* −18.7 (−32.1, -5.2)*
HAQ score −0.6 (−5.4, 4.3) −2.1 (−14.5, 10.3)
Steroids ≥3 months   
no Referent Referent
yes 7.3 (−0.7, 15.3) 9.7 (−11.1, 30.6)
  1. aadjusted for age and sex; bp < 0.05 test for trend; *p < 0.05.
  2. 1Years between first symptom onset and ultrasound scan.
  3. 2Assessed in those with baseline radiographs (n = 27).