Table 5.

Results of multiple ordinal logistic model using three levels of severity as response

Variable	Level	β	OR	95% CI	P value
Age (years)	<40	Ref
	40–69	0.461	1.586	0.824–3.053	0.1675
	⩾70	1.229	3.419	1.596–7.323	0.0016
Hypertension	Present	1.215	3.372	2.185–5.202	<0.0001
	Absent	Ref
ALT (μ/l)	>50	1.195	3.304	2.107–5.180	<0.0001
	⩽50	Ref
cTnI (ng/ml)	⩽0.04	Ref
	>0.04	2.010	7.464	4.292–12.980	<0.0001
Myohaemoglobin (ng/ml)	⩽48.8	Ref
	>48.8	0.795	2.214	1.420–3.453	0.0005
Days between illness onset and diagnosis		0.054	1.056	1.012–1.101	0.0111
Days between illness onset and admission		0.047	1.048	1.009–1.087	0.0142

ALT, alanine aminotransferase; cTnI, cardiac troponin I.