Are ultrasound features at the first metatarsophalangeal joint associated with clinically-assessed pain and function? A study of people with gout, asymptomatic hyperuricaemia and normouricaemia

Table 2 Association between clinical characteristics and presence of the double contour sign

	Least squares mean		Diff.	95% CI for Diff.		P
	Present	Absent	Diff.	Lower	Upper	P
1st MTP joint Pain VAS, mm	3.4	7.0	3.5	−1.0	8.0	0.12
Manchester Foot Pain and Disability Index	10.1	4.8	−5.4	−7.8	−2.9	<0.001^a
1st MTP joint range of motion,°	68.8	72.2	2.4	−3.2	8.1	0.40
1st MTP joint temperature, °C	26.8	26.0	−0.8	−1.5	0.1	0.018
Walking velocity, m/s	1.02	1.00	−0.02	−0.10	0.05	0.52

Results are presented adjusted for diagnostic group. ^aSignificantly different at Bonferroni-adjusted level of < 0.01. Diff. Difference in mean estimate between presence and absence, CI Confidence Interval, 1st MTP joint first metatarsophalangeal joint, ^o degrees

ISSN: 1757-1146