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Br J Ophthalmol 89:1127-1130 doi:10.1136/bjo.2004.059683
  • Clinical science
    • Scientific reports

Further validation of the Daily Living Tasks Dependent on Vision: identification of domains

Table 2

 Columns A and B, loading factors for items. (A) When four dimensions are seen in PCA; (B) when one dimension is seen in PCA. The highest loading factor for each item is in bold text. (C) Parameter estimates from ordinal regression, PLUM analysis

Items A Loading factors for items B Loading factors for items C
Dim 1 Dim 2 Dim 3 Dim 4 Single dimension Parameter estimates
*Denote redundant item.
Noticing objects off to either side 0.06 0.23 0.81 0.01 0.19 4.33
Recognising seasonal changes in the garden 0.20 0.69 0.36 0.18 0.52 3.96
Cutting up food on your plate 0.26 0.74 0.32 0.17 0.60 3.60
Enjoying the scenery if out for a drive 0.31 0.66 0.34 0.25 0.62 3.34
Pouring yourself a drink 0.38 0.61 0.35 0.24 0.65 2.75
Using kitchen appliances 0.50 0.55 0.29 0.29 0.73 2.69
Seeing steps and using them 0.45 0.34 0.50 0.30 0.59 2.66
Reading newspaper headlines 0.47 0.74 0.06 0.08 0.64 2.63
Distinguishing a person’s features at arm’s length 0.50 0.63 0.02 0.21 0.61 2.50
Do you feel confident to walk around your own neighbourhood? 0.47 0.21 0.62 0.30 0.54 2.42
Cutting your finger nails? 0.41 0.60 0.19 0.28 0.61 2.14
Difficulty adjusting to brightness after the dark? 0.17 0.16 0.16 0.84 0.28 2.06
Signing documents—eg, cheques 0.63 0.58 0.14 0.19 0.77 1.98
Identifying money from a wallet* 0.69 0.53 0.19 0.16 0.79 1.94
Difficulty adjusting to darkness after light? 0.34 0.31 0.06 0.69 0.42 1.89
Watching TV programmes 0.61 0.44 0.29 0.24 0.71 1.62
Reading road signs/street names 0.62 0.48 0.20 0.28 0.73 1.06
Reading correspondence* 0.77 0.51 0.12 0.12 0.80 0.60
Distinguishing a person’s features across the room 0.71 0.37 0.14 0.29 0.69 0.42
Feel confident to walk around unfamiliar neighbourhood 0.72 0.23 0.39 0.31 0.71 0.00
Reading normal size newsprint 0.82 0.31 0.11 0.11 0.64 −0.46
Distinguishing a person’s features across the street 0.81 0.22 0.19 0.24 0.64 −0.96

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