Table 3.

Risk Ratios and 95% CIs Examining the Risk of Subsequent Lateral Ankle Sprain Among Those With Versus Those Without a History of Lateral Ankle Sprain

Study (Year)	Group, No.		Group, Subsequent Lateral Ankle Sprain, No. (%)		Risk Ratio (95% CI)a
	No Lateral Ankle Sprain History	Lateral Ankle Sprain History	No Lateral Ankle Sprain History	Lateral Ankle Sprain History
Arnason et al12 (2004)	305	212	3 (1.0)	11 (5.2)	5.28 (1.49, 18.68)b
Attenborough et al13 (2016)	40	54	6 (15.0)	5 (9.3)	0.62 (0.20, 1.88)
Bahr and Bahr27 (1997)	234	232	10 (4.3)	38 (16.4)	3.83 (1.96, 7.51)b
Barrett et al14 (1993)	328	241	10 (3.0)	5 (2.1)	0.68 (0.24, 1.97)
Baumhauer et al15 (1995)	96	49	11 (11.5)	4 (8.2)	0.71 (0.24, 2.12)
Cumps et al34 (2007)	58	42	7 (12.1)	7 (16.7)	1.38 (0.52, 3.64)
de Noronha et al11 (2013)	69	52	10 (14.5)	21 (40.4)	2.79 (1.44, 5.40)b
Ekstrand and Gillquist28 (1983)	243	81	19 (7.8)	17 (21.0)	2.68 (1.47, 4.91)b
Faude et al29 (2006)	56	87	11 (19.6)	22 (25.3)	1.29 (0.68, 2.44)
Frey et al23 (2010)	683	316	49 (7.2)	44 (13.9)	1.94 (1.32, 2.85)b
Hartley et al24 (2018)	492	59	33 (6.7)	24 (40.7)	6.06 (3.86, 9.52)b
Henry et al33 (2016)	162	48	9 (5.6)	5 (10.4)	1.88 (0.66, 5.33)
Hiller et al16 (2008)	60	55	20 (33.3)	16 (29.1)	0.87 (0.51, 1.51)
Kofotolis and Kellis30 (2007)	64	138	8 (12.5)	24 (17.4)	1.39 (0.66, 2.93)
Kofotolis et al31 (2007)	180	132	55 (30.6)	84 (63.6)	2.08 (1.61, 2.69)b
McGuine and Keene25 (2006)	583	182	35 (6.0)	27 (14.8)	2.47 (1.54, 3.97)b
Meeuwisse et al26 (2003)	281	167	33 (11.7)	27 (16.2)	1.38 (0.86, 2.21)
Milgrom et al32 (1991)	339	51	51 (15.0)	16 (31.4)	2.09 (1.29, 3.36)b
Pourkazemi et al8 (2018)	68	28	3 (4.4)	7 (25.0)	5.67 (1.58, 20.36)b

^aRisk ratios compared the risk of subsequent lateral ankle sprain in the lateral ankle sprain history group versus the no lateral ankle sprain history group, which served as the referent.

^bIndicates risk ratio was different (ie, 95% CI excluded 1.00).