Posterior pelvic ring involvement detected with CT taken within a week of admission in acute fragility fractures of the pelvis (FFP) does not predict failure of conservative treatment: a retrospective cohort study

Table 7 Comparison of outcome between subgroup without and with secondary displacement *

	No sec displacement	Sec displacement	P value (chi-square test)
Need for secondary surgery n = 6 on 140	2/105	4/35	0.016
Complications during hospitalisation n = 35 on 119	27/89	8/30	0.703
Mortality rate at 1 year n = 18 on 140	14/105	4/35	0.771
Mortality rate during admission n = 5 on 140	4/105	1/35	0.793

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