Potential for reducing immobility times of a mobility monitor in-bed sensor system – a stepped-wedge cluster-randomised trial

Table 3 Cumulative time at risk, number of new pressure ulcers and corresponding density rates per 10 days the patient spent in bed

Period	ICU^a	Study phase	N° of patients	N° of patient-days at risk	N° of new pressure ulcers	Incidence density rate (per 10 days)
Period 1	Neurosurgical	Control	95	654	9	0.138
Period 1	Neurological	Control	194	933	2	0.021
Period 2	Neurosurgical	Control	114	565	4	0.071
Period 2	Neurological	Intervention	160	845	1	0.012
Period 3	Neurosurgical	Intervention	93	530	3	0.057
Period 3	Neurological	Intervention	152	831	1	0.012
All periods	Neurosurgical	Control	209	1219	13	0.107
	Neurosurgical	Intervention	93	530	3	0.057
	Neurological	Control	194	933	2	0.021
	Neurological	Intervention	312	1676	2	0.012
All periods	All ICUs	Control	403	2152	15	0.070
All periods	All ICUs	Intervention	405	2206	5	0.022

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