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Table 1 Patient characteristics (n = 1176)

From: Radiation-induced bronchiolitis obliterans organizing pneumonia (BOOP) syndrome in breast cancer patients is associated with age

Age(y), median (range)

52 (19-93)

Breast site (right/left/bilateral)

584/573/19

Collagen vascular disease (yes/no)

2/1174

Smoking (yes/no/unknown)

201/973/2

Alcohol (yes/no/unknown)

439/735/2

Allergy (yes/no/unknown) Clinical stage (n = 1195 lesion)

400/775/1

0

163

I

477

IIA/IIB

270/145

IIIA/IIIB/IIIC

48/32/49

IV

2

ocult

4

Ipsilateral breast tumor recurrence

5

Histologictype (n = 1195lesion) Noninvasive ductal carcinoma

169

Invasive ductal carcinoma

929

Others

97