Table 3.

Rate of self-harm per 100 bed days per month pre- and post-intervention, without outliers

	Self-harm incidents, total		Self-harm incidents, evening		Self-harm incidents, non-evening
	Mean (SD)	Range	Mean (SD)	Range	Mean (SD)	Range
Pre-intervention	5.49 (3.47)	1.07–13.61	3.58 (2.36)	1.07–9.20	1.91 (1.34)	0–4.42
Post-intervention	3.23 (2.27)	0–9.20	2.21 (1.81)	0–7	1.02 (0.93)	0–2.94

Pre-intervention dates: 1st June 2016 to 31st May 2018; Post-intervention dates: 1st June 2018 to 31st November 2019; Evening = 3–11 pm; Non-evening = any time excluding 3–11 pm