Table 2.

Comparison between the US findings between the RA and non-rheumatoid control group

	RA	Non-RA	p value
MSK-US findings (22 hand joint examination) RA vs. non-RA
Mean PD score (SD)	1.82 (± 4.39)	0.86 (± 3.29)	0.0001
Mean GS score (SD)	7 (± 10)	2.98 (± 7.80)	0.003
Mean erosion score (SD)	3.61 (± 6.11)	0.86 (± 2.72)	0.003
Number of patients with PD ≥ 1 in their hands	18/51 (35.3%)	16/50 (32%)	0.96
MSK-US findings (10 MTP joint examination) RA vs non-RA
Mean PD score (SD)	0.76 (± 1.35)	0.36 (± 1.40)	0.93
Mean GS score (SD)	6.18 (± 7.39)	3.88 (± 5.24)	0.58
Mean erosions score (SD)	1.39 (± 1.5)	0.38 (± 0.85)	0.79
Number of patients with PD ≥ 1 in their feet	18/51 (35.3%)	12/50 (24%)	0.78

P < 0.05 was considered significant

GS, grey scale; MSK-US, musculoskeletal ultrasound; PD ≥ 1, power Doppler signal ≥ 1; RA, rheumatoid arthritis; SD, standard deviation