2.

Stratified analysis of various treatment modalities

Groups	n	5-year LRFS (%)	P	5-year MMFS (%)	P	5-year PFS (%)	P	5-year OS (%)	P
LRFS, local progression-free survival; MMFS, multiple myeloma-free survival; PFS, progression-free survival; OS, overall survival; RT, radiotherapy; CT, chemotherapy; S, surgery.
Treatment			0.125		0.027		0.013		0.335
RT+/–CT	20	88.7		92.9		88.7		85.2
S+/–CT	17	73.1	0.069	70.3	0.027	41.1	0.005	67.5	0.275
S+RT+/–CT	12	90.9	0.755	77.9	0.077	68.8	0.197	91.7	0.345
Dose (Gy)
<45	6	62.5	0.008	53.3	0.036	41.7	<0.001	80.0	0.661
≥45	26	94.7		94.4		90.0		88.8