Table 2.

Differences in walking speed between the study groups

Variable	Asymptomatic group (n = 13)	Hip OA group (n = 27)	Knee OA group (n = 20)	Ankle OA group (n = 30)	p value
Velocity (m/second)	1.4 ± 0.2 (1.2–1.5)	1.1 ± 0.2 (0.96–1.1)	0.9 ± 0.2 (0.85–0.94)	0.9 ± 0.2 (0.77–0.94)	< 0.0001*+
% Recovery	65.0 ± 3.0 (63–67)	54.0 ± 10.0 (50–58)	57 ± 10.0 (53–62)	47.0 ± 13.0 (40–52)	< 0.0001# ^ ♦
% Congruity	10 ± 3.5 (7.8–12)	17.6 ± 10.0 (13.5–22)	16.6 ± 8.5 (11.8–21)	26.9 ± 10.9 (22.8–31.1)	< 0.0001*♦ +

OA = osteoarthritis; mean ± SD (95% CI) for velocity, energy recovery, and % congruity in the sample of asymptomatic individuals and those with isolated osteoarthritis of the hip, knee, and ankle; *difference between asymptomatic and all OA groups; +difference between ankle OA and hip OA cohorts; #difference between asymptomatic and hip and ankle OA cohorts; ^difference between knee and hip OA cohorts; ♦difference between knee and ankle OA cohorts.