Table 1

Baseline characteristics of study cohort

Characteristic*

All patients (n = 355)


N

%


Age in years


< 55

92

26


55-64

106

30


65-74

94

27


≥ 75

63

18


ACE-27 Comorbidity Index (score)


None (0)

120

34


Mild (1)

140

39


Moderate (2)

51

14


Severe (3)

44

12


Race


Non-white

134

38


White

221

62


Gender


Female

120

34

Male

235

66


Insurance


Missing

19

5


Public

45

13


Medicare + Supplemental

96

27


Veterans Administration

67

19


Private

128

36


Geographic region


West/Midwest

178

50


South

91

26

Atlantic

86

24


Health system


Fee-for-Service

212

60


Integrated health system

143

40


Annual household income


Missing

66

19


< $20,000/year

100

28


≥ $20,000/year

189

53


Diagnosis of metastatic disease


Recurrence

58

16


Stage IV at diagnosis

297

84


Primary tumor site


Missing

5

1


Colon

258

73


Rectum

76

21

Colorectal

16

5


Receipt of surgery within 4 weeks of chemotherapy


No qualifying surgery within 4 weeks

321

90


Qualifying surgery within 4 weeks

34

10


Presence of any of following 5 cardiovascular risks


No risk factor grade > 0

181

51


Presence of ≥ 1 risk factor grade > 0

174

49


Hypertension


Grade 0

203

57


Grade > 0

152

43


Angina/coronary artery disease


Grade 0

307

87


Grade > 0

48

14


Venous disease including venous thrombosis


Grade 0

346

98


Grade > 0

9

3


Peripheral artery disease


Grade 0

345

97


Grade > 0

10

3


Congestive heart failure


Grade 0

342

96


Grade > 0

13

4


*Only three patients had missing insurance data after imputation. The composition of health systems in the health system categorization of fee-for-services vs. integrated has been previously described [8]. Comorbidity was calculated using the Adult Comorbidity Evaluation-27 (ACE-27) index [11]. The cardiovascular comorbidities were collected as a part of the ACE-27. Some percentages may not sum to 100 due to rounding.

Zafar et al. BMC Cancer 2011 11:354   doi:10.1186/1471-2407-11-354

Open Data