Table 5.

Patient characteristics and MRA outcomes (Modified from [1] and reproduced by permission)

Patients undergoing MRA (N = 371)	MRA “uninterpretable” n (%N)
Demographic characteristic
Outpatients (345)	88 (25.5)
Inpatients (23)	3 (13.0)
Female sex (206)	52 (25.2)
Male sex (165)	40 (24.2)
Race
White (252)	58 (23.0)
Black (103)	32 (31.1)
Other (16)	2 (12.5)
Co-Existing conditions
Smoking history (182)	45 (21)
Heart failure (24)	3 (9)
Current asthma (51)	19 (35)
Chronic obstructive pulmonary disease (35)	11 (28)
Current pneumonia (57)	16 (28.1)
Surgery within past 3 months (44)	10 (22.7)
Cancer (60)	13 (21.7)
Symptoms and signs
Dyspnea (118)	32 (27.1)
Pleuritic pain (45)	16 (35.6)
Cough (134)	42 (31.3)
Hemoptysis (16)	5 (31.3)
Tachypnea (≥20 breaths/min) (115)	28 (24.3)
Tachycardia (> 100 beats/min) (54)	15 (25.9)
Wells’ score [17]
Low (226)	57 (25.2)
Moderate (122)	28 (23.0)
High (23)	7 (30.4)