Table 5.

Abnormalities detected at US scans reported as making a difference to diagnosis at that clinic visit. US abnormalities were commonly found at both sets of MCPs, PIPs and wrists. Lower limb joints are under represented in the ultrasound data set

Jointa	No. (%) joint scanned (n = 68)b	No. (%)c with US abnormality	No. (%) ST only	No. (%) ST + PD
MCP1 L	47 (69.1%)	6 (12.8%)	5 (10.6%)	1 (2.1%)
MCP2 L	53 (77.9%)	19 (35.8%)	6 (11.3%)	13 (24.5%)
MCP3 L	51 (75.0%)	29 (56.9%)	17 (33.3%)	12 (23.5%)
MCP4 L	49 (72.1%)	21 (42.9%)	16 (32.7%)	5 (10.2%)
MCP5 L	50 (73.5%)	8 (16.0%)	1 (2.0%)	7 (14.0%)
MCP1 R	47 (69.1%)	3 (6.4%)	3 (6.4%)	0 (0.0%)
MCP2 R	52 (76.5%)	16 (30.8%)	2 (3.8%)	14 (26.9%)
MCP3 R	53 (77.9%)	20 (37.7%)	9 (17.0%)	11 (20.8%)
MCP4 R	48 (70.6%)	16 (33.3%)	9 (18.8%)	7 (14.6%)
MCP5 R	48 (70.6%)	11 (22.9%)	1 (2.1%)	10 (20.8%)
IP L	31 (45.6%)	1 (3.2%)	0 (0.0%)	1 (3.2%)
PIP2 L	40 (58.8%)	9 (22.5%)	2 (5.0%)	7 (17.5%)
PIP3 L	39 (57.4%)	10 (25.6%)	4 (10.3%)	6 (15.4%)
PIP4 L	37 (54.4%)	9 (24.3%)	3 (8.1%)	6 (16.2%)
PIP5 L	36 (52.9%)	9 (25.0%)	3 (8.3%)	6 (16.7%)
IP R	33 (48.5%)	1 (3.0%)	0 (0.0%)	1 (3.0%)
PIP2 R	39 (57.4%)	10 (25.6%)	4 (10.3%)	6 (15.4%)
PIP3 R	39 (57.4%)	15 (38.5%)	9 (23.1%)	6 (15.4%)
PIP4 R	35 (51.5%)	8 (22.9%)	3 (8.6%)	5 (14.3%)
PIP5 R	36 (52.9%)	8 (22.2%)	3 (8.3%)	5 (13.9%)
Wrist L	52 (76.5%)	18 (34.6%)	3 (5.8%)	15 (28.8%)
Wrist R	49 (72.1%)	19 (38.8%)	7 (14.3%)	12 (24.5%)
MTPs L	5 (7.4%)	5 (100.0%)	3 (60.0%)	2 (40.0%)
MTPs R	7 (10.3%)	7 (100.0%)	5 (71.4%)	2 (28.6%)

^aResults presented for joints scanned at ≥ 5 US scans

^bn = 68 (one questionnaire not included due to incomplete US findings)

^c% of US scans at which each joint was imaged (e.g. for MCP1 (left) abnormalities were detected at 6 (12.8%) of 47 US scans)