Table 3

Frequency and distribution of erosions in CR and US

Prevalence of erosionsDistribution of erosions
CRUSCRUS
Value%Value%Value%Value%
Wrist3/2401.254/2101.903/634.764/3411.76
McP14/2401.672/1381.454/636.352/345.88
McP21/2400.427/2103.331/631.597/3420.59
McP34/2401.672/2100.954/636.352/345.88
McP42/2400.832/1381.452/633.172/345.88
McP51/2400.420/1380.001/631.590/340.00
IP12/2400.830/1380.002/633.170/340.00
PiP20/2400.000/2100.000/630.000/340.00
PiP34/2401.671/2100.484/636.351/342.94
PiP42/2400.830/1380.002/633.170/340.00
PiP52/2400.830/1380.002/633.170/340.00
DiP26/2402.500/1380.006/639.520/340.00
DiP35/2402.080/1380.005/637.940/340.00
DiP44/2401.670/1380.004/636.350/340.00
DiP51/2400.420/1380.001/631.590/340.00
MtP12/2110.95NANA2/633.17NANA
MtP22/2110.950/2100.002/633.170/340.00
MtP33/2111.420/2100.003/634.760/340.00
MtP44/2111.901/2100.484/636.351/342.94
MtP511/2115.2115/2107.1411/6317.4615/3444.12
Total63/46551.3534/32701.0463/63100.0034/34100.00
  • Table 3 shows the analysis of erosions performed at the joint level including 4655 joints on CR and 3270 on US. The distribution of erosions refers to the number of bone erosions related to the total number of bone erosions in the whole study population.

  • CR, conventional radiography; DiP, distal interphalangeal; IP, interphalangeal; McP, metacarpophalangeal; MtP, metatarsophalangeal; NA, not available; PiP, proximal interphalangeal; US, ultrasound.