Psychometric properties of four fear of falling rating scales in people with Parkinson’s disease

BMC Geriatrics

Table 4 Scoring distribution and data completeness of Activities-specific Balance Confidence scale (time 1 data)

Items	Activity	Mean (SD) n = 97^a	Missing or invalid responses^b	Corrected item-total correlations n = 82^c
1.	Walk around the house	7.2 (2.7)	5	0.84
2.	Walk up or down stairs	6.0 (3.4)	6	0.90
3.	Bend over and pick up a shoe from the floor	6.4 (3.0)	5	0.86
4.	Reach for a small can off a shelf at eye level	7.5 (2.8)	6	0.80
5.	Stand on your tiptoes and reach for something above your head	6.1 (3.3)	6	0.83
6.	Stand on a chair and reach for something	4.4 (3.8)	9	0.80
7.	Sweep or vacuum the floor	6.3 (3.7)	7	0.87
8.	Walk to a taxi that is waiting by the sidewalk	6.9 (3.3)	6	0.89
9.	Get into or out of a car	6.7 (3.0)	5	0.88
10.	Cross a street	6.6 (3.5)	8	0.90
11.	Step onto or off a curb	6.8 (3.3)	5	0.90
12.	Walk on a street where people are rapidly passing	6.8 (3.2)	6	0.91
13.	Others bump into you as you walk on the street	5.9 (3.5)	5	0.90
14.	Travel by bus without a bag of groceries	6.6 (3.8)	13	0.89
15.	Travel by bus with a bag of groceries	6.1 (3.8)	13	0.90
16.	Walk on icy sidewalks	3.7 (3.5)	6	0.75
Total score (n = 82)		62.4 (29.6)
Min-Max		1–100
Skewness (SE)		–0.45 (0.27)
Floor/ceiling effects (%)		0/4.9

SE = standard error.
^aOne person left the questionnaire blank and four persons misunderstood the entire scale.
^bMissing data includes the four persons who misunderstood the scale, but not the person who left it blank.
^cFifteen persons did not answer all 16 items and did therefore not receive a total score.
Possible item score range 0–10, possible total score range 0–100, higher = better.

ISSN: 1471-2318