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Table 4 Rotated main scale factor loadings from the pattern matrix

From: Testing the psychometric properties of the illness perceptions questionnaire for OCD (IPQ-O)

IPQ-O main-scale question

Original IPQ-R item (IPX) or new item (N)

1. Consequences

2. Control

3. Permanence

4. Coherence

5. Reactivity

6. Spectrum

7. Emotion

OIP73. My OCD can strongly affect the way others see me

IP9

0.723

− 0.037

0.002

− 0.069

− 0.093

0.138

− 0.054

OIP31. My OCD causes difficulties for those who are close to me

IP11

0.723

0.047

0.069

0.032

−0.011

− 0.020

− 0.163

OIP58. My OCD has a negative effect on my relationships with others

N

0.709

0.028

0.033

−0.099

0.008

− 0.026

−0.040

OIP40. My OCD negatively affects the way I act towards those close to me

N

0.678

−0.028

0.019

−0.131

0.125

0.039

−0.065

OIP3. My OCD strongly affects the way others act towards me

N

0.671

−0.126

−0.016

− 0.058

−0.094

0.203

−0.092

OIP75. My OCD has major consequences on my life

IP7

0.640

−0.063

0.078

0.028

−0.007

−0.060

0.168

OIP74. My OCD gets in the way of me getting things done

N

0.550

−0.123

0.007

0.032

0.044

−0.043

0.180

OIP56. My OCD affects my physical health and wellbeing

N

0.505

−0.024

0.001

0.028

0.142

−0.047

0.078

OIP11. My OCD has serious financial consequences

IP10

0.501

−0.090

−0.181

0.085

−0.066

0.061

0.211

OIP8. I have had difficulties with my work or studies because of my OCD

N

0.466

0.030

0.004

0.084

0.098

−0.162

0.159

OIP59. My OCD does not have much effect on my life (r)

IP8

0.452 a

− 0.029

0.306

0.041

−0.068

−0.143

0.162

OIP5. My OCD makes me feel worthless

N

0.424

−0.034

0.009

−0.157

− 0.030

0.049

0.264

OIP15. My OCD makes me feel ashamed or embarrassed

N

0.364

−0.033

− 0.001

− 0.224

0.051

0.008

0.225

OIP51. My OCD is a serious condition

IP6

0.344

0.070

0.210

0.055

0.043

−0.167

0.263

OIP54. Treatment will be effective if I put in enough effort

N

−0.040

0.809

0.049

−0.036

− 0.016

0.129

0.196

OIP71. Treatment can control my OCD

IP22

−0.043

0.782

−0.003

−0.012

0.015

0.065

0.106

OIP49. Treatment will be effective with a good health professional

N

−0.059

0.736

−0.023

− 0.044

0.077

0.063

0.170

OIP63. I have the power to influence my OCD

IP16

−0.095

0.698

0.072

0.088

−0.033

0.080

−0.022

OIP46. The negative effects of my OCD can be prevented (avoided) by my treatment

IP21

− 0.023

0.656

− 0.150

−0.059

0.002

0.133

0.111

OIP36. There is nothing which can help my condition (r)

IP23

−0.074

0.654

−0.054

0.132

0.038

−0.220

−0.132

OIP16. There is very little that can be done to improve my OCD (r)

IP19

−0.133

0.637

−0.100

0.102

−0.025

−0.127

− 0.123

OIP41. What I do can determine whether my OCD gets better or worse

IP13

0.075

0.615

−0.007

0.065

0.123

−0.011

−0.078

OIP39. There is a lot which I can do to control my OCD

IP12

−0.026

0.615

−0.047

0.128

0.008

0.162

− 0.091

OIP60. Nothing I do will affect my OCD (r)

IP15

0.053

0.591

0.047

0.025

0.019

−0.263

−0.170

OIP62. My OCD will improve in time (r)

IP18

0.057

−0.571

0.303 a

0.022

−0.033

0.029

−0.014

OIP33. Treatment will be effective in curing my OCD

IP20

−0.004

0.561 a

−0.329

0.010

−0.029

0.125

0.152

OIP61. My actions will have no effect on the outcome of my OCD (r)

IP17

0.003

0.527

0.128

0.101

−0.026

− 0.256

− 0.171

OIP30. The course of my OCD depends on me

IP14

0.020

0.509

−0.018

0.111

0.083

0.131

−0.053

OIP37. My OCD will last for a long time

IP3

0.069

−0.100

0.747

−0.008

−0.002

0.004

0.102

OIP67. I expect to have this OCD for the rest of my life

IP5

−0.022

−0.130

0.733

−0.002

0.066

0.064

−0.022

OIP44. I expect that some of my OCD symptoms will never go away

N

−0.016

−0.084

0.717

−0.018

0.043

0.072

−0.015

OIP1. My OCD will last a short time (r)

IP1

0.026

−0.064

0.690

0.057

−0.102

−0.185

0.070

OIP20. This OCD will pass quickly (r)

IP4

0.036

−0.113

0.670

0.016

−0.123

−0.144

0.044

OIP57. Looking back, I have always had OCD ‘traits’

N

0.037

0.155

0.539

−0.048

0.027

−0.019

−0.055

OIP42. Having OCD is part of my personality

N

−0.110

−0.030

0.533 a

−0.021

0.074

0.401

−0.033

OIP4. OCD has become part of who I am

N

0.081

−0.155

0.459

0.027

0.134

0.194

0.074

OIP17. I can’t remember how I felt when I didn’t have OCD

N

0.034

−0.130

0.373

−0.048

0.128

0.027

0.169

OIP55. I don’t understand my OCD (r)

IP26

0.053

0.042

−0.007

0.858

0.063

−0.038

0.005

OIP50. My OCD doesn’t make any sense to me (r)

IP27

0.027

0.009

0.026

0.805

0.079

−0.073

−0.118

OIP32. My OCD is a mystery to me (r)

IP25

0.070

0.038

−0.080

0.782

0.027

− 0.041

−0.055

OIP23.The symptoms of my condition are puzzling to me (r)

IP24

−0.031

−0.055

− 0.028

0.716

− 0.028

0.009

− 0.028

OIP28. I have a clear picture or understanding of my condition

IP28

−0.052

0.114

0.139

0.590

−0.001

0.084

0.202

OIP27. The types of OCD symptoms I have change depending on what is going on in my life at the time

N

−0.105

− 0.103

− 0.045

0.133

0.740

0.146

0.154

OIP38. My symptoms come and go in cycles

IP30

−0.177

0.092

−0.144

0.018

0.680

−0.018

−0.010

OIP47. The types of symptoms I have change over time

N

−0.101

0.075

0.016

0.024

0.573

0.148

0.172

OIP34. I go through cycles in which my OCD gets better and worse

IP32

−0.130

0.196

0.070

0.027

0.559

−0.077

0.016

OIP21. My symptoms of OCD are affected by my mood

N

0.054

0.037

0.059

−0.093

0.491

−0.026

− 0.168

OIP6. Old OCD symptoms reappear when I am tired

N

0.144

0.052

0.092

0.053

0.473

−0.119

− 0.152

OIP76. The symptoms of my OCD change a great deal from day to day

IP29

0.078

−0.056

− 0.089

− 0.086

0.430

0.212

0.025

OIP19. My symptoms get better when there are fewer pressures in my life

N

0.146

0.133

0.036

0.080

0.402

−0.019

−0.210

OIP72. I can find it difficult to tell whether or not OCD is affecting my thinking

N

−0.026

0.056

0.176

−0.256

0.363

−0.143

0.058

OIP66. My OCD gets worse when I take on new responsibilities

N

0.145

−0.021

0.045

0.010

0.362

0.011

0.048

OIP64. My OCD is very unpredictable

IP31

0.089

−0.024

0.039

−0.282

0.359

0.044

0.016

OIP25. Upsetting stories in the media can make my OCD worse

N

0.021

−0.064

0.048

−0.029

0.336

−0.229

0.146

OIP65. Everyone has a bit of OCD; it’s just that some people have more

N

0.054

0.001

−0.005

−0.045

− 0.049

0.598

− 0.052

OIP43. If my OCD was cured, it would change who I am as a person

N

0.103

−0.023

0.367 a

−0.041

− 0.005

0.372

0.112

OIP53. Everyone has compulsions to some extent

N

−0.054

0.097

0.224

−0.008

0.076

0.362

− 0.112

OIP18. People with OCD have the same worries as everyone else, just more extreme

N

0.035

0.167

− 0.068

−0.021

0.079

0.362

−0.008

OIP69. My OCD makes me feel ‘fed up’

N

0.186

−0.015

0.094

−0.195

0.034

−0.124

0.625

OIP68. When I think about my OCD I get upset

IP34

0.298

−0.037

0.027

−0.119

−0.016

− 0.078

0.542

OIP52. I get depressed when I think about my OCD

IP33

0.247

−0.076

0.168

−0.165

0.016

−0.054

0.454

OIP12. Having OCD makes me feel anxious

IP37

0.080

0.125

0.255

−0.079

0.080

0.010

0.453

OIP7. My OCD makes me feel afraid

IP38

0.242

0.103

−0.056

− 0.071

0.240

− 0.170

0.415

OIP29. My OCD does not worry me (r)

IP36

0.188

0.046

0.176

−0.079

−0.043

− 0.217

0.411

OIP45. My OCD makes me feel angry

IP35

0.334

−0.008

0.015

−0.120

0.124

−0.017

0.366 a

Total N questions

 

14

13

11

5

12

3

7

α

 

0.893

0.914

0.857

0.867

0.789

0.592

0.860

  1. Loadings ≥ .3 are highlighted in bold
  2. (r) represents reverse items
  3. aDenotes which sub-scale a cross-loading item is allocated (where more than one loading ≥.3)