Table 5. Correlates of IMH on admission in ATAAD.

Variable	Parameter estimate	Odds ratio	95% confidence limits	Attributable risk**	P value
Intercept	–2.4338
Age >60 years	1.0353	2.82	1.72–4.60	14.3%±3.4%	<0.001
Female	0.4927	1.64	1.01–2.65	7.4%±3.7%	0.045
Marfan	1.3557	3.88	0.96–15.67	19.1%±11.6%	0.057
Retrograde dissection	1.5894	4.90	2.71–8.87	12.7%±5.1%	<0.001

*, odds-ratios, parameter estimates, 95% confidence-intervals and P value from MLR; **, % attributable mortality (±Standard error) obtained from GLM-analysis.