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Table 2 Baseline characteristics of nab-paclitaxel initiators by line of therapya

From: The treatment patterns, efficacy, and safety of nab®-paclitaxel for the treatment of metastatic breast cancer in the United States: results from health insurance claims analysis

Characteristic

First line (n = 172)

Second line (n = 211)

Third line or later (n = 281)

All (N = 664)

n

%

n

%

n

%

n

%

Age

        

  ≤ 39 y

4

2.3

7

3.3

16

5.7

27

4.1

 40–49 y

36

20.9

53

25.1

64

22.8

153

23.0

 50–59 y

53

30.8

78

37.0

116

41.3

247

37.2

 60–69 y

58

33.7

60

28.4

66

23.5

184

27.7

  ≥ 70 y

21

12.2

13

6.2

19

6.8

53

8.0

Geographic area

        

 Midwest

39

22.7

47

22.3

65

23.1

151

22.7

 Northeast

12

7.0

11

5.2

25

8.9

48

7.2

 South

91

52.9

123

58.3

146

52.0

360

54.2

 West

30

17.4

30

14.2

45

16.0

105

15.8

Healthcare utilization

        

 No. of physician visits

        

  0

0

0

0

0

0

0

0

0

  1–2

2

1.2

2

0.9

3

1.1

7

1.1

   ≥ 3

170

98.8

209

99.1

278

98.9

657

98.9

No. of emergency department visits

        

  0

103

59.9

117

55.5

190

67.6

410

61.7

  1–2

51

29.7

82

38.9

72

25.6

205

30.9

   ≥ 3

18

10.5

12

5.7

19

6.8

49

7.4

No. of hospitalizations

        

  0

119

69.2

138

65.4

196

69.8

453

68.2

  1–2

47

27.3

68

32.2

77

27.4

192

28.9

   ≥ 3

6

3.5

5

2.4

8

2.8

19

2.9

 

Median

IQR

Median

IQR

Median

IQR

Median

IQR

Length of health plan membership, y

2.6

(1.4–4.2)

1.9

(1.0–3.0)

2.7

(1.7–4.0)

2.4

(1.4–3.7)

Length of inpatient stay, db

5.0

(3.0–13.0)

4.0

(2.0–9.0)

5.0

(2.0–8.0)

5.0

(2.0–9.0)

  1. IQR interquartile range
  2. aData are from the Optum Research Database, January 1, 2005 to September 30, 2012
  3. bAmong those with ≥ 1 hospital stay