Table 3 Waiting times: regression analysis parameter estimates (n = 4056†).

Variable	Factor levels	β coefficient	Significance	SE
Study period	Pre‐intervention v intervention	0.069		0.133
	Pre‐intervention v post‐intervention	−0.337	*	0.112
DSH‡ diagnosis	DSH v no DSH	−0.564	**	0.104
Arrival mode	Emergency ambulance v own arrangements	−0.441	**	0.099
	Emergency ambulance v police/prison escort	0.265		0.322
	Emergency ambulance v other mode of arrival	−0.443		0.257
Arrival time band	2 am–8 am v 8 am–2 pm	−0.069		0.165
	2 am–8 am v 2 pm–8 pm	−0.770	**	0.153
	2 am–8 am v 8 pm–2 am	−0.752	**	0.150
Triage category	Normal/routine v immediate	3.758	**	0.237
	Normal/routine v urgent	0.486	**	0.104
See psychiatric nurse	See psychiatric nurse v not see psychiatric nurse	−1.522	**	0.211
No. of A&E attendances	NA	0.023	**	0.002
Site	Hospital 2 v hospital 1	−0.586	**	0.156

*p<0.01, **p<0.001.

†1733 attendees with available waiting times excluded due to missing explanatory variable values.

‡Deliberate self harm.