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Table 1 Participant demographic data between the anterior ankle impingement (AAI) group and pure CAI group

From: Arthroscopic debridement of anterior ankle impingement in patients with chronic lateral ankle instability

  AAI group (n = 22) pure CAI group (n = 38)
Age, mean SD, y 31.2 ± 8.8 27.6 ± 8.5 n.s.
Body mass index (kg/m2) 24.5 ± 3.0 23.2 ± 2.4 n.s.
Gender, n Males, n = 16 Males, n = 31
Females, n = 6 Females, n = 7
Side, n Left, n = 12 Left, n = 15
Right, n = 10 Right, n = 23
Injury time, months 37 ± 42 26 ± 36 n.s.
Follow-up time, months 37 ± 10 (24 ~  56) 37 ± 10 (24 ~  53) n.s.
  1. AAI anterior ankle impingement. n.s. indicated there was no significant difference between groups