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Table 3 SCOPE: factor structure and refinement

From: Assessing vulnerability to risk of suicide and self-harm in prisoners: a Rasch analysis of the suicide concerns for offenders in the prison environment (SCOPE-2)

Original Item No.

New Item No.1

Statement

Original Factor2

Rasch Refinement

Optimism

PSelf-Worth3

7

 

I do not feel suicidal when I receive bad news

X

 

Removed due to dependency with items 6, 21 & 25

17

 

I do not feel helpless

X

 

Removed due to over discrimination misfit

25

 

If I were depressed I would not think about harming myself

X

 

Removed due to dependency with items 6, 7 & 21

18

O1

If I worry about things I sleep OK

a

 

Remains in Factor 1

13

 

I do not feel fed up

X

 

Removed due to over discrimination misfit

16

 

I enjoy everything

X

 

Removed due to under discrimination misfit

6

 

I do not think about harming myself

X

 

Removed due to dependency with items 7, 21 & 25

21

O2

I do not think about how I can end my life

a

 

Rescoring suggests dichotomy. Remains in Factor 1

5

O3

If I were on remand I would not feel stressed out

a

 

Remains in Factor 1

24

O4

I feel like there is hope in my life

a

 

Remains in Factor 1

23

O5

I can think straight when I am depressed

a

 

Remains in Factor 1

8

O6

I feel fine about coming into this establishment

a

 

Remains in Factor 1

14

O7

I think that everyone likes me

a

 

Remains in Factor 1

11

O8

If I am nervous I do not lose my appetite

a

 

Remains in Factor 1

1

O9

I do not feel lonely in my room on my own

a

 

Remains in Factor 1

19

O10

If I were depressed I would talk to someone

a

0

Originally in Factor 2, loads and fits with Factor 1

4

 

I will speak to an officer when I have a problem

 

X

Removed due to dependency with item 3

10

P1

When arrested I would say I was sorry

 

a

Remains in Factor 2

3

P2

If I were feeling suicidal I would speak to someone

 

a

Remains in Factor 2

15

P3

The day before I was due to appear in court I would think about the future

 

a

Remains in Factor 2

27

P4

I always turn up in court

 

a

Remains in Factor 2

9

 

If I had been arrested I would try and get in contact with my family

 

X

Removed due to dependency with item 20

2

P5

If I had a job I would not commit crime

 

a

Remains in Factor 2

12

P6

If I stole money for drugs I would feel like I had let myself down

 

a

Remains in Factor 2

22

P7

If I had a fight with a prisoner I would ask to see the governor

 

a

Remains in Factor 2

20

P8

My family support me

 

a

Rescoring suggests dichotomy. Remains in Factor 2

26

P9

If I had a supportive family I would not kill myself

 

a

Rescoring suggests dichotomy. Remains in Factor 2

  1. 1 New item numbering presented by factor structure o = optimism on factor one and p = protective self-worth on factor two
  2. 2 X = item removed from dataset, a = Item remains in original factor, 0 = Item switched from one factor to another
  3. 3 PSelf Worth = Protective Self-Worth