Table 2.

Number of adverse events compared between UL-LOS and non-UL-LOS patients and within the UL-LOS categories

	N records	N records containing at least 1 trigger	N (and % of) records containing at least 1 adverse event
Non-UL-LOS patients	44	6	4 (9)
All patients with a UL-LOS	85	51	43 (51)
Of which patients with 50%–99% longer-than-expected LOS	33	14	9 (27)
Of which patients with 100%–199% longer-than-expected LOS	32	22	20 (63)
Of which patients with 200% and above longer-than-expected LOS	20	15	14 (70)

UL-LOS, unexpectedly long length of stay; LOS, length of stay.