Comparison of distraction arthroplasty alone versus combined with arthroscopic microfracture in treatment of post-traumatic ankle arthritis

Table 1 Comparison of the baseline data of the patients between the distraction group and the combined group

	Distraction group (n = 46)	Combined group (n = 50)	P value*
Age (years)	43.6 ± 9.3	41.8 ± 8.7	n.s.
Gender (male/female)	18/26	20/30	n.s.
Body mass index (BMI, kg/m²)	24.6 ± 3.4	25.1 ± 3.8	n.s.
Side (left/right)	20/26	22/28	n.s.
Duration of symptoms (months)	21.2 ± 6.7	20.4 ± 6.8	n.s.
Follow-up duration (months)	30.8 ± 3.1	31.4 ± 3.6	n.s.
Causes (%)			n.s.
Ankle fractures	22 (47.8%)	24 (48.0%)
Recurrent sprains	10 (21.7%)	9 (18.0%)
Persistent ankle instability	8 (17.4%)	10 (20.0%)
Ankle dislocations	5 (10.9%)	6 (12.0%)
Other	1 (2.2%)	1 (2.0%)

Unless otherwise stated, the data are presented as mean ± SD
*Independent t test or chi-square test. The P values shown are for intergroup comparisons. Significance was accepted for P values of <0.05

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