Psychometric properties of the original and short versions of the Falls Efficacy Scale-International (FES-I) in people with Parkinson’s disease

Table 2 Discriminant capacity of the original and short FES-I

	Fear of falling
	No	Yes		p
Original FES-I	19 (17–24)	36 (26–47)		<0.001
Short FES-I	8 (7–10)	26 (12–20)		<0.001
	Activity avoidance
	No	Yes		p
Original FES-I	20 (17–25)	37 (26–47)		<0.001
Short FES-I	8 (7–11)	16 (12–20)		<0.001
	Falls past six months
	No	Yes		p
Original FES-I	22 (18–30)	38 (27–48)		<0.001
Short FES-I	9 (7–13)	17 (12–20)		<0.001
	Near falls past six months
	No	Yes		p
Original FES-I	22 (17–25)	32 (24–46)		<0.001
Short FES-I	9 (7–12)	14 (10–20)		<0.001
	Self-rated Parkinson severity
	Mild	Moderate	Severe	p
Original FES-I	20 (17–23)	29 (20–41)	45 (30–54)	<0.001^*
Short FES-I	8 (7–9)	12 (9–17)	20 (13–23)	<0.001^*

Data are presented as median (first-third quartile)
P-values are based on Mann-Whitney U-tests, except the p-values for Self-rated Parkinson severity, which are based on Kruskal-Wallis test
FES-I Falls Efficacy Scale-International. Possible scoring ranges: Original 16–64, Short 7–28; higher = worse
*All subsequent unpaired comparisons showed statistical significant differences (Bonferroni correction criterion of p < 0.016), except between persons with Moderate and Severe Parkinson severity for Short FES-I (p = 0.017)

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