Table 1

Demographics, signs and symptoms, risk factors and prior medical history by year for 850 patients undergoing CT angiography
Characteristics 2000 2005 2008 Total p
n 74 383 393 850
Demographics
 Age (years) (mean ± SD) 66.8 ± 16.8 62.9 ± 17 60 ± 19.3 61.9 ± 18.2 0.004
 Female (%) 59.5 65 67.9 65.9 0.33
 Females < 40 years (%) 6.8 7.8 16.5 11.8 0.004
 Body mass index (kg/m2) (mean ± SD) 27.3 ± 5.5 27.4 ± 7.2 27.8 ± 6.2 27.6 ± 6.7 0.760
Signs and symptoms
 Shortness of breath (%) 79.7 63.7 62.3 64.5 0.015
 Chest pain (%) 27 38.9 50.1 43.1 <0.001
 Palpitations (%) 5.5 1.3 3.3 2.6 0.06
 Syncope (%) 2.7 1 3.8 2.5 0.04
 Hypoxia (%) 13.7 6.5 10.2 8.8 0.06
 Cough (%) 9.5 9.9 12 10.8 0.60
 Hemoptysis (%) 1.4 0.3 3.6 1.9 0.003
 Lower extremity pain (%) 4.1 0 5.9 3.1 <0.001
 Leg edema/tenderness (%) 1.4 0 8.9 4.2 <0.001
 Other (%) 14.9 10.2 27.2 18.5 <0.001
 Systolic blood pressure (mmHg) 128 ± 27 131 ± 23 129 ± 22 130 ± 23 0.389
 Diastolic blood pressure (mmHg) 73 ± 13 75 ± 15 73 ± 14 74 ± 14 0.19
 Respiratory rate (/min) 23.8 ± 7.5 20.7 ± 6 20 ± 5.7 20.6 ± 6 <0.001
 Oxygen saturation (%) 92.7 ± 6.8 94.1 ± 6 95.3 ± 9.6 94.5 ± 8 0.01
 Requiring supplemental O2 (%) 40.5 22.1 19 22.3 <0.001
Risk factors for thrombosis (%)
 Immobility 31.1 24.8 15.8 21.2 0.001
 Active malignancy 31.1 29.8 22.1 26.4 0.03
 Hospitalized in the prior 4 weeks 38.4 34.7 28.3 32.1 0.08
 Surgery in the prior 4 weeks 25.7 17 16.3 17.4 0.14
 Prior PE or DVT 17.6 9.4 12.5 11.5 0.01
 Pregnant 1.4 1.6 5.1 3.2 0.01
 Known hypercoagulable disorder 0 1.6 1 1.2 0.48
 On estrogen therapy 6.8 1.8 3.6 3.1 0.06
Prior medical history (%)
 Any lung disease 29.7 26.4 24.4 25.8 0.58
 Hypertension 48.7 16.5 51.2 35.3 <0.001
 Coronary artery disease 27 18.5 23.2 21.4 0.14
 Congestive heart failure 18.9 6 6.6 7.4 <0.001
 Other cardiac disease 25.8 6.8 13.5 11.5 0.26
 Dialysis 0 1.3 2.3 1.7 0.28
 Transferred from another institution 8.2 11.5 8.4 9.8 0.31

Chandra et al.

Chandra et al. BMC Pulmonary Medicine 2013 13:9   doi:10.1186/1471-2466-13-9

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