The Royal Marsden
Supine
Prone
p
Chest-wall
displacement
(A–P)
3 (1–7)
1 (0–2)
<0.001
Clip
R–L
1 (0–3)
0 (0–1)
S–I
0.001
A–P
3 (0–6)
0.5 (0–2)