Table 1.

Patient and tumor characteristics

Characteristic	HDR-BT (n = 36)	EBRT (n = 100)
Age in years
Median	58	62
Range*	54.75-65.25	50-69
Breast volume [cc]
Median	1102.6	1179.3
Range	874-1380.75	871.9-1491.2
Side of the tumor
Right-sided	21	46
Left-sided	15	54
Localization of tumor
Upper outer quadrant	21	58
Upper inner quadrant	4	10
Lower outer quadrant	2	17
Lower inner quadrant	4	8
Other	5	7
Size of the tumor [cm]
Median	18	16
Range	11-29.25	11-23

HDR-BT – high-dose-rate interstitial brachytherapy, EBRT – external beam radiotherapy

^*Range: 25^th quartile – 75^th quartile