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Table 2 Comparison between skin ultrasound examination at baseline and at the one-year follow-up

From: High frequency ultrasound of skin involvement in systemic sclerosis – a follow-up study

Measurement normal valuesa baseline follow-up change p
  (95 % CI) median (IQR) median (IQR) median (IQR)  
Skin thickness   (mm) (mm) (MM)  
Phalanx (1.15–2.11) 2.14 (1.92–2.37) 2.05 (1.88–2.33) −0.02 (−0.22 – 0.13) 0.28
Hand (0.98–1.47) 1.51 (1.39–1.71) 1.50 (1.34–1.66) −0.040 (−0.18 – 0.12) 0.14
Forearm (1.05–1.75) 1.61 (1.44–1.76) 1.55 (1.30–1.76) −0.080 (−0.23 – 0.10) 0.052
Leg (1.02–1.64) 1.47 (1.33–1.62) 1.43 (1.29–1.55) −0.040 (−0.16 – 0.06) 0.060
Chest (1.04–1.89) 1.63 (1.50–1.92) 1.58 (1.44–1.79) −0.12 (−0.30 – 0.15) 0.024
TST (5.62–8.59) 8.53 (7.94–9.03) 8.28 (7.47–8.94) −0.22 (−0.79 – 0.30) 0.011
Skin echogenicity    (pixels)   
Phalanx (15.0–44.0) 25.0 (20.0–30.0) 24.5 (21.0–31.0) 0.0 (−4.0 – 4.0) 0.78
Hand (19.0–47.0) 29.0 (22.5–34.0) 28.0 (22.0–35.0) 0.0 (−5.0 – 6.0) 0.59
Forearm (22.0–51.0) 38.0 (33.0–45.5) 37.5 (31.5–46.0) 1.0 (−7.0 – 7.0) 0.49
Leg (31.0–55.0) 47.0 (42.4–56.0) 47.0 (42.4–56.0) −0.80 (−6.0 – 9.0) 0.94
Chest (30.0–54.0) 48.0 (41.5–53.0) 48.0 (41.5–53.5) 0.50 (−6.0 – 6.5) 0.53
TSE (136.0–240.0) 188 (168–212) 187 (166–213) −2.5 (−23.5 – 30.0) 0.82
  1. IQR interquartile range, TST total sum of skin thickness, TSE total sum of skin echogenicity
  2. anormal values from previous study [6]