Table 1. Clinical characteristics of the patients.

Clinical characteristics
	Patients who had CTA and D-dimer	Patients with no PE	Main branch and lobar PE	(Sub)segmental PE
n	693	640	14	39
Age (years)	59.82±15.66	59.22±15.6*	66.78±14.39*	67.02±14.94*
Male	366 (52.81%)	336 (52.5%)	8 (1.15%)	22 (44.8%)
CTSI	2.3±1.3	2.27±1.29	2.64±1.49	2.69±1.28
Disease duration (days)	6.58±4.05	6.67±4.08	5.83±3.76	4.82±3.18

The age of the patients who had PE was significantly higher than the age of non-PE patients. Disease duration is the time since symptom onset(*). CTSI: CT severity index. Disease duration: Time since the onset of symptoms to the CTA scan.