TABLE 5.

Factor structure of the City BiTS (Partner version).

			Factor analysis of all symptoms (varimax rotation)
		Uniqueness	General symptoms	Birth-related symptoms
B	Intrusions
3	Recurrent or unwanted memories of the birth that you can’t control	0.36	0.26	0.75
4	Bad dreams or nightmares about the birth	0.69	0.25	0.49
5	Flashbacks to the birth and/or reliving the experience	0.50	0.20	0.68
6	Getting upset when reminded of the birth	0.30	0.23	0.80
7	Feeling tense or anxious when reminded of the birth	0.32	0.28	0.77
C	Avoidance
8	Trying to avoid thinking about the birth	0.34	0.24	0.77
9	Trying to avoid things that remind me of the birth	0.45	0.22	0.71
D	Negative mood and cognitions
10	Not being able to remember details of the birth	0.93	0.24	0.11
11	Blaming myself or others for what happened during the birth	0.67	0.34	0.46
12	Feeling strong negative emotions about the birth	0.36	0.42	0.68
13	Feeling negative about myself or thinking something awful will happen	0.50	0.62	0.34
14	Lost interest in activities that were important to me	0.39	0.72	0.30
15	Feeling detached from other people	0.30	0.77	0.32
16	Not being able to feel positive emotions	0.40	0.71	0.24
E	Hyperarousal
17	Feeling irritable or aggressive	0.47	0.69	0.24
18	Feeling self-destructive or acting recklessly	0.61	0.57	0.25
19	Feeling tense and on edge	0.36	0.77	0.22
20	Feeling jumpy or easily startled	0.61	0.56	0.28
21	Problems concentrating	0.41	0.75	0.16
22	Not sleeping well because of things that aren’t due to the baby’s sleep pattern	0.58	0.61	0.21
	Total variance explained		25.45%	25.36%

Items 23 and 24 do not measure symptoms of PTSD but identify a dissociative PTSD subtype so were therefore excluded from this analysis.