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Table 4 Unforced principal components analysis with varimax rotation after removal of items and forced one-factor analysis with N/A items scored as zero (items loading at > 0.4 in bold).

From: +Psychometric evaluation of the MacDQoL individualised measure of the impact of macular degeneration on quality of life

Item

Rotated Component Matrix

Four factor solution

(variance explained = 64.3%)

Single factor solution

(variance explained = 49%)

 

Factor 1

Factor 2

Factor 3

Factor 4

Factor 1

household tasks

0.734

 0.098

0.136

0.312

0.6869

personal affairs

0.754

 0.254

0.146

0.099

0.7264

shopping

0.747

 0.042

0.317

0.219

0.7145

personal relationship

0.210

-0.062

0.132

0.778

0.4219

family

0.179

 0.411

0.199

0.629

0.6127

friends and social

0.252

 0.604

0.095

0.541

0.6961

appearance

0.342

 0.210

0.443

0.181

0.5821

do physically

0.587

 0.473

0.269

0.023

0.7659

get out and about

0.699

 0.324

0.252

0.125

0.7809

holidays

0.199

 0.793

0.188

0.050

0.6582

hobbies/leisure

0.589

 0.549

0.081

0.091

0.7484

self-confidence

0.495

 0.282

0.259

0.266

0.6691

motivation

0.387

 0.444

0.310

0.291

0.7150

peoples reaction

0.265

 0.259

0.702

-0.071

0.5935

future

0.189

 0.284

0.533

0.162

0.5541

finances

0.048

-0.070

0.747

0.148

0.3558

independence

0.716

 0.444

0.173

0.158

0.8345

do for others

0.679

 0.322

0.227

0.099

0.7491

mishaps

0.387

 0.651

0.419

0.176

0.7906

enjoy meals

0.375

 0.349

0.538

0.160

0.7141

time taken

0.321

 0.460

0.466

0.204

0.7208

nature

0.305

 0.752

0.150

0.127

0.7122