Table 2.

Short Form–36 Component Summary and Norm-Based Domain Scale, Foot and Ankle Ability Measure, and Foot and Ankle Ability Measure–Sport Scores

Scale	Component Summary	Domain	Group				F1,66 Value	P Value
			Functional Ankle Instability		Uninjured
			Mean ± SD	95% Confidence Interval	Mean ± SD	95% Confidence Interval
Short Form–36a
	Physical		54.53 ± 5.07	52.96, 56.10	57.78 ± 3.67	56.21, 59.30	8.58	.005
		Physical function	54.48 ± 3.78	53.46, 55.47	56.60 ± 1.24	55.60, 57.57	9.03	.004
		Role-physical	54.10 ± 4.81	52.18, 56.01	54.98 ± 5.88	53.04, 56.81	0.38	.542
		Bodily pain	52.03 ± 6.72	49.78, 54.07	58.52 ± 5.25	56.29, 60.52	18.45	<.005
		General health	55.55 ± 7.62	52.50, 58.31	55.56 ± 8.58	52.63, 58.35	0.002	.967
	Mental		51.4 ± 7.40	48.75, 54.02	51.4 ± 7.40	48.60, 53.79	0.010	.919
		Vitality	53.32 ± 6.98	50.72, 55.22	56.04 ± 5.92	53.66, 58.09	3.39	.070
		Social functioning	52.55 ± 7.05	50.24, 54.60	52.84 ± 5.08	50.57, 54.87	0.04	.846
		Role-emotional	51.08 ± 7.24	48.36, 53.81	50.93 ± 8.15	48.25, 53.62	0.006	.938
		Mental health	52.99 ± 6.37	50.60, 55.05	53.65 ± 6.18	51.31, 55.70	0.19	.664
Foot and Ankle Ability Measureb			93.71 ± 6.15	91.53, 95.89	99.51 ± 1.35	99.03, 99.99	28.02	<.005
Foot and Ankle Ability Measure–Sportc			84.47 ± 8.40	82.53, 88.40	99.78 ± 0.72	99.53, 100.03	97.91	<.005

^aNorm-based measures have a population mean of 50 and an SD of 10.

^bMaximum raw score is 84; each score was then converted to a percentage.

^cMaximum score is 40; each score was then converted to a percentage.