Table 3.

Survival estimates by treatment-related factors of 69 registered osteosarcoma patients with primary multi-systemic metastases including bone lesions.

			Overall Survival
	Patients		1-Year		2-Year		5-Year
			Rate	SE	Rate	SE	Rate	SE	p *
All eligible patients with bone metastases		69	0.473	0.061	0.182	0.049	0.073	0.034
Complete local treatment of all bone metastases
	No	46	0.370	0.071	0.095	0.045	0.024	0.023	0.010
	Yes (radiotherapy and/or surgery)	12	0.667	0.136	0.476	0.150	0.190	0.120
	Unknown	11
Type of local treatment of all bone metastases
	No	46	0.370	0.071	0.095	0.045	0.024	0.023	0.037
	Surgery only	9	0.778	0.139	0.519	0.176	0.130	0.121
	Radiotherapy involved	3	0.333	0.272	0.333	0.272	0.333	0.272
	Unknown	11
Type of local treatment of all bone metastases
	Surgery only	9	0.778	0.139	0.519	0.176	0.130	0.121	0.913
	Radiotherapy involved	3	0.333	0.272	0.333	0.272	0.333	0.272
	Not all bone metastases treated locally/unknown	47
Macroscopically complete resection of all bone metastases
	No	57	0.424	0.065	0.129	0.046	0.064	0.035	0.062
	Yes	9	0.778	0.139	0.519	0.176	0.130	0.121
	Unknown	3
Radiotherapy as part of local treatment of all unresected bone metastases
	No	55	0.436	0.067	0.163	0.052	0.041	0.028	0.250
	Yes, radiotherapy involved	3	0.333	0.272	0.333	0.272	0.333	0.272
	Unknown	11

* p-value, log-rank test.