Table 6

Estimates of item measures and fit statistics from Rasch analysis

Item
Item Number
ρ
Standard Error
Infit zstd
Outfit zstd

Matching clothes
12
-1.07
0.14
0.00
-0.20
Finding something
7
-0.92
0.13
0.10
-0.30
See reaction
11
-0.92
0.13
2.20
2.00
Visit people
13
-0.82
0.12
-0.70
-1.30
Noticing objects
10
-0.7
0.11
-0.70
-0.90
Eye pain
4
-0.42
0.10
-2.30
-3.00
Going down steps
9
-0.41
0.10
-1.80
-2.10
Reading signs
8
-0.4
0.10
-0.20
-0.50
See up close
6
-0.29
0.09
0.30
-0.20
Overall eyesight
2
-0.1
0.09
-6.90
-6.60
Reading print
5
-0.03
0.09
2.70
2.60
Overall health
1
0.15
0.08
5.80
5.40
Worry about eyesight
3
0.2
0.09
-1.20
-0.90
See movies
14
0.24
0.09
6.90
6.80
Limited
18
0.32
0.09
1.30
1.60
Accomplish less
17
0.32
0.09
-0.40
0.30
Stay home
20
0.44
0.09
1.10
1.40
Feel frustrated
21
0.48
0.09
1.20
0.90
Less control
22
0.69
0.10
0.00
0.40
Need help
24
0.71
0.10
-2.90
-1.60
Eye discomfort
19
0.72
0.10
-0.70
-0.10
Rely too much
23
0.88
0.11
0.60
0.60
Embarrass myself
25
0.94
0.11
-0.60
0.00

Labiris et al. BMC Ophthalmology 2008 8:4   doi:10.1186/1471-2415-8-4