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Table 5 Results of the item-total analysis and factor analysis 

From: Validity and reliability of the Japanese versions of cognitive and behavioral scales for irritable bowel syndrome

 

26-item version

18-item version

 

Factor loadings

 

Factor loadings

Items

Item-total correlation

Factor 1

Factor 2

Item-total correlation

Factor 1

Factor 2

13. I avoid making plans in case I have problems with my IBS

0.706

0.936

-0.075

0.699

0.950

-0.083

12. I avoid going out in case I have problems with my IBS

0.726

0.894

-0.020

0.721

0.909

-0.033

26. I avoid staying away from home overnight in case my IBS flares up

0.579

0.859

-0.159

0.595

0.847

-0.130

21. I avoid certain social situations (e.g., restaurants) because of my IBS

0.655

0.794

-0.016

0.668

0.758

0.035

20. I avoid certain work situations (e.g., meetings) because of my IBS

0.736

0.794

0.086

0.752

0.758

0.146

14. I carry other items (e.g., wet wipes, sanitary towels, spare underwear) in case my IBS flares up

0.617

0.683

-0.110

0.608

0.682

-0.121

17. I avoid sex in case my IBS flares up (and causes embarrassment)

0.559

0.682

-0.161

0.551

0.716

-0.207

15. I take medication (e.g., before going out) just in case my IBS flares up

0.683

0.665

0.017

0.704

0.599

0.100

22. I avoid certain foods (e.g., dairy products, spicy foods) because of my IBS

0.665

0.626

0.114

0.667

0.586

0.155

19. I ask for reassurance about my IBS

0.690

0.610

0.267

0.706

0.559

0.341

16. I carry medication with me in case my IBS flares up

0.693

0.516

0.125

0.725

0.439

0.221

24. When I have diarrhea I do things to ease it (e.g. take prescribed medication, take alternative medication)

0.623

0.436

0.122

 

-

-

10. I avoid certain foods when I have bowel problems

0.600

0.301

0.211

 

-

-

9. I avoid exercise when I have stomach pains

0.511

0.290

0.151

 

-

-

11. I wear baggy clothing when my stomach feels bloated or distended

0.463

0.252

0.112

 

-

-

6. I spend more time on the toilet than I ideally would like

0.632

-0.087

0.733

0.655

-0.068

0.694

4. After opening my bowels I check for blood

0.453

-0.170

0.703

0.487

-0.167

0.686

5. After opening my bowels I check my stool for abnormalities

0.526

-0.170

0.701

0.574

-0.188

0.712

3. I strain when opening my bowels

0.635

0.107

0.650

0.640

0.127

0.603

25. I am constantly aware of my stomach

0.752

0.117

0.639

0.759

0.032

0.733

7. I often go to the toilet to open my bowels and then do not pass anything

0.564

0.019

0.545

0.581

0.053

0.482

18. When I go out, I make sure I know where the nearest toilet is

0.741

0.366

0.441

0.746

0.295

0.525

8. I often go to the toilet to pass water and find I open my bowels

0.476

0.125

0.426

 

-

-

1. I eat specific foods to help me open my bowels more

0.481

0.022

0.399

 

-

-

2. I eat specific foods to help me open my bowels less

0.491

0.240

0.393

 

-

-

23. After I open my bowels, I wipe more than I would like

0.609

0.264

0.390

 

-

-

 

Eigenvalue

9.63

1.57

Eigenvalue

7.89

1.38

 

Variance (%)

37.03%

43.06%

Variance (%)

43.84%

51.51%

 

Cronbach’s α =0.93

Cronbach’s α = 0.92