Skip to main content

Table 1 Clinical characteristics of patients and their distrubution across PPI groups

From: Proton pump inhibitors may reduce the efficacy of ribociclib and palbociclib in metastatic breast cancer patients based on an observational study

Characteristic

PALBOCICLIB

RIBOCICLIB

Total number of patients (n = 105)

Concomitant use of PPIs

P score

Total number of patients (n = 112)

Concomitant use of PPIs

P score

No

Yes

No

Yes

Age, median (Range)

59 (32–83)

58 (35–76)

61 (32–83)

-

53 (32–87)

49 (32–87)

57 (38–87)

-

Menopausal status, n(%)

 Premenopause

32(30.4)

14(35.0)

18(27.7)

0.514

43(38.3)

22(43.1)

21(34.4)

0.436

 Postmenopause

73(69.5)

26(65.0)

47(72.3)

 

69(61.6)

29(56.9)

40(65.6)

ECOG PS, n (%)

 0

19(18)

8(20.0)

11(16.9)

0.079

38(33.9)

23(45.1)

15(24.6)

0.072

 1

74(70.4)

31(77.5)

43(66.2)

 

60(53.5)

23(45.1)

37(60.7)

 2

12(11.4)

1(2.5)

11(16.9)

 

14((12.5)

5(9.8)

9(14.8)

Disease site, n (%)

 Visceral

63(60)

22(55.0)

41(63.1)

0.421

54(48.2)

24(47.1)

30(49.2)

0.851

 Nonvisceral

42(40)

18(45.0)

24(36.9)

 

58(51.7)

27(52.9)

31(50.8)

Number of metastatic site, n (%)

  < 3

95(91.5)

37(92.5)

58(89.2)

0.738

98(87.5)

47(92.2)

51(83.6)

0.252

  ≥ 3

10(9.5)

3(7.5)

7(10.8)

 

14(12.5)

4(7.8)

10(16.4)

Endocrine therapy, n (%)

 Letrozolea

49(46.6)

23(57.5)

26(40.0)

0.107

66(58.9)

34(66.7)

32(52.5)

0.177

 Fulvestranta

56(53.3)

17(42.5)

39(60.0)

 

46(41)

17(33.3)

29(47.5)

Dose Reduction, n (%)

 Yes

56(53.3)

19(47.5)

37(56.9)

0.224

61(54.4)

25(49.0)

36(59.0)

0.254

 No

49(46.7)

21(52.5)

28(43.1)

 

51(45.6)

26(51.0)

25(41.0)

CDK inhibitor intervalb

  < 18 months

65(61.9)

27(67.5)

38(58.5)

0.411

86(76.7)

41(80.4)

45(73.8)

0.502

  ≥ 18 months

40(38)

13(32.5)

27(41.5)

 

26(23.2)

10(19.6)

16(26.2)

PPI, n (%)

 Pantoprazole

  

28(43.1)

   

18(29.5)

 

 Rabeprazole

  

17(26.2)

   

10(16.4)

 

 Esomeprazole

  

8(12.3)

   

18(29.5)

 

 Lansoprazole

  

9(13.8)

   

3(4.9)

 

 Omeprazole

  

3(4.6)

   

12(19.7)

 
  1. aAll hormone sensitive patients used letrozole + CDK inhibitor combination, all hormone resistant patients used fulvestrant + CDK inhibitor combination
  2. bCDK interval: Time between metastatic breast cancer (MBC) diagnosis and CDK treatment