Table 1 Principal components analysis with oblique rotation of the modified IADL scale

Handling finances

0.09

0.41

0.783

0.355

Housekeeping

0.89

0.94

0.138

0.888

Preparing food

0.45

0.80

0.456

0.850

Handling medications

0.05

0.25

0.814

0.225

Doing laundry

0.56

0.92

0.281

0.909

Shopping

0.10

0.45

0.799

0.287

Using transportation

0.35

0.85

0.571

0.729

Using the telephone

0.05

0.25

0.856

0.204

Extraction Sums of Squared Loadings

Variance (%)

40.98

39.61

Cumulative (%)

40.98

80.58

Cronbach’s α

0.842

0.916

Total Cronbach’s α

0.873