| |
US1 versus US2
|
US versus MRI
|
US versus x-ray
|
MRI versus x-ray
|
|---|
|
Bone erosions
| | | | |
|
MCP joint (total)
|
95%; κ = 0.795
|
87%; κ = 0.504
|
89%; κ = 0.268
|
89%; κ = 0.470
|
|
PsA
|
95%; κ = 0.830
|
85%; κ = 0.547
|
88%; κ = 0.358
|
85%; κ = 0.492
|
|
RA
|
88%; κ = 0.600
|
85%; κ = 0.318
|
83%; κ = NA
|
90%; κ = NA
|
|
CTRL
|
100%; κ = NA
|
95%; κ = NA
|
95%; κ = NA
|
100%; κ = NA
|
|
PIP joint (total)
|
86%; κ = 0.522
|
86%; κ = 0.296
|
87%; κ = 0.361
|
92%; κ = 0.292
|
|
PsA
|
83%; κ = 0.526
|
85%; κ = 0.400
|
85%; κ = 0.411
|
88%; κ = 0.160
|
|
RA
|
100%; κ = NA
|
90%; κ = NA
|
93%; κ = 0.375
|
95%; κ = 0.643
|
|
CTRL
|
88%; κ = NA
|
85%; κ = NA
|
88%; κ = NA
|
100%; κ = NA
|
|
DIP joint (total)
|
100%; κ = 1.000
|
96%; κ = -0.015
|
96%; κ = 0.506
|
96%; κ = 0.481
|
|
PsA
|
100%; κ = 1.000
|
93%; κ = -0.026
|
93%; κ = 0.527
|
93%; κ = 0.467
|
|
RA
|
100%; κ = NA
|
100%; κ = NA
|
100%; κ = NA
|
100%; κ = NA
|
|
CTRL
|
100%; κ = NA
|
100%; κ = NA
|
100%; κ = NA
|
100%; κ = NA
|
|
MTP joint (total)
|
90%; κ = 0.702
|
-
|
89%; κ = 0.259
|
-
|
|
PsA
|
90%; κ = 0.799
|
-
|
89%; κ = 0.378
|
-
|
|
RA
|
100%; κ = 1.000
|
-
|
78%; κ = -0.084
|
-
|
|
CTRL
|
90%; κ = 0.783
|
-
|
100%; κ = NA
|
-
|
|
Bone proliferations
| | | | |
|
MCP joint (total)
|
97%; κ = 0.783
|
93%; κ = -0.036
|
96%; κ = NA
|
97%; κ = NA
|
|
PsA
|
95%; κ = 0.776
|
88%; κ = -0.061
|
94%; κ = NA
|
95%; κ = NA
|
|
RA
|
100%; κ = NA
|
100%; κ = NA
|
100%; κ = NA
|
100%; κ = NA
|
|
CTRL
|
100%; κ = NA
|
100%; κ = NA
|
100%; κ = NA
|
100%; κ = NA
|
|
PIP joint (total)
|
92%; κ = 0.665
|
93%; κ = 0.424
|
93%; κ = 0.117
|
94%; κ = NA
|
|
PsA
|
89%; κ = 0.648
|
88%; κ = 0.397
|
89%; κ = 0.120
|
90%; κ = NA
|
|
RA
|
100%; κ = NA
|
100%; κ = NA
|
98%; κ = NA
|
100%; κ = NA
|
|
CTRL
|
100%; κ = NA
|
100%; κ = NA
|
100%; κ = NA
|
100%; κ = NA
|
|
DIP joint (total)
|
95%; κ = 0.851
|
95%; κ = 0.427
|
94%; κ = 0.472
|
98%; κ = 0.658
|
|
PsA
|
94%; κ = 0.838
|
92%; κ = 0.414
|
91%; κ = 0.476
|
97%; κ = 0.651
|
|
RA
|
100%; κ = NA
|
100%; κ = NA
|
100%; κ = NA
|
100%; κ = NA
|
|
CTRL
|
100%; κ = NA
|
100%; κ = NA
|
95%; κ = NA
|
100%; κ = NA
|
|
MTP joint (total)
|
93%; κ = 0.515
|
-
|
99%; κ = NA
|
-
|
|
PsA
|
92%; κ = 0.250
|
-
|
98%; κ = NA
|
-
|
|
RA
|
100%; κ = 1.000
|
-
|
100%; κ = NA
|
-
|
|
CTRL
|
100%; κ = NA
|
-
|
100%; κ = NA
|
-
|
- Values are absolute agreement presented as a percentage. The imaging modalities were ultrasonography (US), magnetic resonance imaging (MRI), and projection radiography (x-ray). The interobserver substudy was performed by ultrasonographer 1 (Charlotte Wiell = US1) and ultrasonographer 2 (Marcin Szkudlarek = US2). A hyphen (-) indicates that the measurement was not performed. κ, kappa value; CTRL, healthy control person; DIP, distal interphalangeal; MCP, metacarpophalangeal; MTP, metatarsophalangeal; NA, not applicable; PIP, proximal interphalangeal; PsA, psoriasis-associated arthritis; RA, rheumatoid arthritis.
