Oligo-recurrence predicts favorable prognosis of brain-only oligometastases in patients with non-small cell lung cancer treated with stereotactic radiosurgery or stereotactic radiotherapy: a multi-institutional study of 61 subjects

Table 5 Univariate Analysis of Local Control of Brain Tumor

Variable	No. of tumors	2-year control rate, months	p value
Histological status
Squamous cell carcinoma	11	53.7 % (11 months)	0.017
Adenocarcinoma	69	85.50 %
Others	9	55.60 %
Size of brain tumor
<3 cm	83	82.80 %	0.002
≥3 cm	6	44.40 %	0.002
Treatment method for brain tumor
SRS	66	84.90 %	0.098
SRT	23	60.0 % (23 months)	0.098
WBRT
Yes	13	84.60 %	0.701
No	76	81.30 %	0.701
Chemotherapy
Yes	29	79.40 %	0.725
No	60	73.90 %	0.725

Abbreviations: SRS stereotactic radiosurgery, SRT stereotactic radiotherapy, WBRT whole brain radiation therapy

ISSN: 1471-2407