Table 1 Patient characteristics and SABR parameters

Male/Female

120/69

(63.5/26.5)

Institution

Nagoya City University Hospital

175

(92.6)

Nagoya Daini Red Cross Hospital

14

(7.4)

Disease stage

T1N0M0

110

(58.2)

T2aM0N0

47

(24.9)

Metastasis

25

(13.2)

Local recurrence

7

(3.7)

Prescribed dose (Gy/fractions)

52/4

50

(26.5)

50/4

26

(13.8)

48/4

97

(51.3)

44/4

3

(1.6)

36/2

4

(2.1)

34/2

6

(3.2)

24/2

1^*

(0.5)

54/6

2

(1.1)

Age (years)

Median 76 (Range 16 - 89)

Planning target volume (cm ³ )

52.7 ± 29.1^**

Mean lung dose (Gy)

4.5 ± 1.8^*

V20 Gy ^† (%)

6.7 ± 3.1^*