Heart Rate Variability Is Associated with Survival in Patients with Brain Metastasis: A Preliminary Report

Table 1

Baseline patient characteristics (𝑛=40).

Characteristics	No.	(%)
Gender
Female	21	52.5%
Male	19	47.5%
Age
Median (range)	61 (39–75)
<65	24	60.0%
≥65	16	40.0%
Primary
NSCLC	24	60.0%
SCLC	6	15.0%
Breast cancer	4	10.0%
Others	6	15.0%
BM at diagnosis
Not	23	57.5%
Yes	17	42.5%
KPS
Median (range)	70 (30–80)
<70	16	40.0%
≥70	24	60.0%
Extracranial metastasis
Without	7	17.5%
With	33	82.5%
Primary status
Not controlled	35	87.5%
Controlled	5	12.5%
RPA Class
I	1	2.5%
II	23	57.5%
III	16	40%

NSCLC: Nonsmall cell lung cancer, SCLC: small cell lung cancer, BM at diagnosis: brain metastases confirmed at primary diagnosis, KPS: Karnofsky performance status, and RPA: recursive partitioning analysis.