Table 4.

Regression analysis modelling length of stay and escalated treatment

	Length of stay		Escalated treatment
	IRR (95% CI)	P value	OR (95% CI)	P value
Age (years)	0.99 (0.98 to 1.001)	0.082	1.05 (1.02 to 1.09)	0.004
Triage
4 and 5	(ref)		(ref)
3	1.53 (1.36 to 1.74)	<0.001	5.93 (3.12 to 11.25)	<0.001
2	2.25 (1.93 to 2.64)	<0.001	30.44 (15.45 to 59.98)	<0.001
1	2.70 (2.24 to 3.25)	<0.001	214.18 (101.38 to 452.48)	<0.001
Sex (female)	1.05 (0.99 to 1.12)	0.095	1.03 (0.89 to 1.20)	0.690
Tertiary	1.26 (0.92 to 1.74)	0.150	0.98 (0.52 to 1.85)	0.940
Escalated treatment	3.45 (2.93 to 4.06)	<0.001	N/A

Five cases with unspecified gender excluded from analysis.

IRR, incidence rate ratio; N/A, not available.