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Table 2 Confirmatory factor analysis of Saving Inventory-Revised (23 items)

From: Hoarding symptoms among psychiatric outpatients: confirmatory factor analysis and psychometric properties of the Saving Inventory – Revised (SI-R)

 

Model 1: Unidimensional model

Model 2: Second order model

Model 3: First order model

Model specification

23 items

23 items

23 items

21 items

 

Mean

SD

Factor loading

Factor loading

Factor loading

Factor loading

Clutter

item 1: How much of the living area in your home is cluttered with possessions?

1.74

1.03

0.55

0.60

0.60

0.60

item 3: How much of your home does clutter prevent you from using?

1.23

1.04

0.66

0.75

0.75

0.75

Item 5: How much of your home is difficult to walk through because of clutter?

0.96

1.03

0.67

0.75

0.75

0.75

Item 8: To what extent do you have so many things that your room(s) are cluttered?

1.32

1.06

0.73

0.75

0.75

0.75

Item 10: How much does clutter in your home interfere with your daily functioning?

1.10

1.11

0.73

0.78

0.78

0.78

Item 12: To what extent does clutter in your home cause you distress?

1.22

1.14

0.69

0.69

0.69

0.69

Item 15: To what extent do you feel unable to control the clutter in your home?

1.19

1.15

0.76

0.77

0.77

0.77

Item 20: How frequently does clutter in your home prevent you from inviting people to visit?

1.17

1.26

0.69

0.73

0.73

0.73

Item 22: To what extent does the clutter in your home prevent you from using parts of your home for their intended purpose?

0.96

1.05

0.73

0.75

0.75

0.75

Difficulty discarding

aItem 4 (r): How much control do you have over your urges to save possessions?

1.77

1.12

0.07

0.05

0.05

 

Item 6: To what extent do you have difficulty throwing things away?

1.32

1.14

0.62

0.69

0.69

0.69

Item 7: How distressing do you find the task of throwing things away?

1.27

1.15

0.69

0.75

0.75

0.75

Item 13: How strong is your urge to save something you know you may never use?

1.31

1.08

0.67

0.71

0.71

0.71

Item 17: How often do you avoid trying to discard possessions because it is too stressful or time consuming?

1.51

1.14

0.67

0.73

0.73

0.73

Item 19: How often do you decide to keep things you do not need and have little space for?

1.49

1.05

0.7

0.75

0.75

0.75

Item 23: How often are you unable to discard a possession you would like to get rid of?

1.30

1.13

0.7

0.72

0.72

0.72

Acquisition

aItem 2 (r): How much control do you have over your urges to acquire possessions?

1.68

1.09

0.15

0.18

0.18

 

Item 9: How distressed or uncomfortable would you feel if you could not acquire something you wanted?

1.66

1.16

0.60

0.67

0.67

0.67

Item 11: How strong is your urge to buy or acquire free things for which you have no immediate use?

1.29

1.15

0.62

0.72

0.72

0.72

Item 14: How upset or distressed do you feel about your acquiring habits?

1.20

1.13

0.71

0.73

0.73

0.72

Item 16: To what extent has your saving or compulsive buying resulted in financial difficulties for you?

1.28

1.21

0.63

0.71

0.71

0.71

Item 18: How often do you feel compelled to acquire something you see?

1.54

1.05

0.57

0.72

0.72

0.72

Item 21: How often do you actually buy (or acquire for free) things for which you have no immediate use or need?

1.36

1.04

0.62

0.71

0.71

0.71

Model fit

Chi-square

  

1726.5

1226.5

1226.5

1026.02

bdf

  

230

224

227

186

RMSEA

  

0.11

0.095

0.094

0.095

SRMR

  

0.08

0.07

0.07

0.06

NNFI

  

0.74

0.82

0.82

0.85

CFI

  

0.76

0.84

0.84

0.86

  1. aItem 2 and Item 4 are reverse coding items
  2. bdf = degree of freedom, RMSEA = root mean square error of approximation, SRMR = standardized root mean square residual, NNFI = non-normed fit index, CFI = comparative fit index