Table 2.

Description of inclusion criteria for CAI and FAI of 31 included articles.

Inclusion Criteria	Number of Articles (%)	Most terms Used in Articles	Number of Articles (%)
A history of at least one significant ankle sprain. The initial sprain must have occurred at least 12 months before study enrollment associated with inflammatory symptoms (pain, swelling, etc.) Resulted in at least one interrupted day of desired physical activity.	28 (90)	“at least 1 (acute, significant, lateral, substantial) ankle sprain”	16 (52)
A history of the previously injured ankle joint “giving way” and/or recurrent sprain and/or “feelings of instability”.	25 (81)	“at least or 2 episodes of giving way”	10 (32)
Self-reported ankle instability should be confirmed with a validated ankle instability-specific questionnaire using the associated cutoff score.	17 (55)	“CAIT ≤ 24”	5 (16)
A general self-reported foot and ankle function questionnaire is recommended to describe the level of disability of the cohort.	5 (16)	FAAM-ADL < 90%, FAAM-Sport < 80%	3 (10)

Abbreviation: CAIT, Cumberland Ankle Instability Tool, FAAM-ADL, Foot and Ankle Ability Measure—Activities of Daily Living; FAAM-Sport, Foot and Ankle Ability Measure—Sport.