Table 3 Sub-group analysis for survival outcomes in patients based on prognostic factors and therapy

From: Natural history of multiple myeloma with de novo del(17p)

Survival outcomes and subgroups

De novo del(17p)

High-risk translocation

Standard-risk

P a

Progression free survival, (months)

  

 Age <65 years (n = 487)

21.0 (16.8–27.0)

25.4 (17.5–32.6)

32.3 (28.7–37.7)

0.176; <0.001

 Age ≥65 years (n = 443)

21.3 (16.0–25.8)

16.6 (11.2–25.5)

27.4 (25.3–30.6)

0.520; 0.002

 ISS I/II (n = 541)

27.0 (21.1–30.3)

24.6 (17.1–31.5)

30.9 (29.1–34.8)

0.699; 0.002

 ISS III (n = 265)

14.3 (9.6–16.9)

16.7 (5.1–34.4)

24.8 (19.7–28.5)

0.212; <0.001

 PI-containing induction (n = 557)

22.6 (18.4–27.5)

25.0 (18.1–32.6)

29.5 (26.3–31.8)

0.336; <0.001

 Others (n = 371)

16.1 (13.8–22.0)

13.3 (5.1–25.5)

30.6 (27.1–33.8)

0.840; <0.001

 Normal LDH (n = 556)

22.5 (18.4–28.2)

18.4 (15.1–25.4)

30.8 (28.0–33.1)

0.241; <0.001

 High LDH (n = 115)

16.1 (8.3–17.9)

6.7 (1.5–21.9)

27.1 (18.3–32.3)

0.245; <0.001

 Low PC proliferative rate (n = 405)

22.3 (17.8–28.8)

16.6 (13.3–22.0)

29.8 (26.3–32.1)

0.106; 0.044

 High PC proliferative rate (n = 101)

10.4 (5.1–18.6)

6.7 (2.3–17.1)

25.0 (17.9–31.3)

0.264; <0.001

Overall survival, (months)

  

 Age < 65 years (n = 487)

55.2 (42.0–67.4)

81.6 (60.5-NR)

130.6 (112.6-NR)

0.030; <0.001

 Age ≥ 65 years (n = 443)

44.7 (37.5–54.6)

67.1 (25.2-NR)

78.6 (70.4–103.6)

0.201; <0.001

 ISS I/II (n = 541)

58.3 (45.3–71.8)

81.6 (60.5-NR)

112.3 (103.6-NR)

0.039; <0.001

 ISS III (n = 265)

33.3 (23.2–44.7)

38.7 (21.1-NR)

64.7 (59.6–124.4)

0.179; <0.001

 Normal LDH (n = 556)

53.9 (43.9–65.9)

67.1 (38.7–81.6)

105.0 (83.9–125.6)

0.322; <0.001

 High LDH (n = 115)

26.8 (18.6–46.4)

NR (7.3-NR)

106.1 (71.7-NR)

0.295; <0.001

 Low PC proliferative rate (n = 405)

47.8 (41.6–67.4)

72.3 (38.7-NR)

103.6 (80.4–130.6)

0.144; <0.001

 High PC proliferative rate (n = 101)

32.9 (15.2–54.9)

21.5 (7.6–28.0)

62.5 (42.7–85.9)

0.217; 0.008

 PI-containing induction (n = 557)

54.3 (40.7–62.6)

NR (54.0-NR)

124.4 (79.9-NR)

0.007; <0.001

 Others (n = 371)

45.2 (36.5–58.3)

67.1 (27.5–85.4)

106.1 (84.8–125.6)

0.405; <0.001

 Early SCT (n = 466)

54.9 (45.3–66.5)

85.4 (72.3-NR)

130.6 (106.1-NR)

0.038; <0.001

 Delayed or no SCT (n = 150)

77.2 (44.6-NR)

NR (38.7-NR)

125.6 (105.6-NR)

0.289; 0.001

  1. ISS indicates international staging system
  2. LDH lactate dehydrogenase, NR not reached, PC plasma cell, PI proteasome inhibitor, and SCT stem cell transplant
  3. aP-value for log-rank test in Kaplan-Meier analysis. The first value represents comparison between del(17p) and high-risk translocation groups and the second value represents comparison between del(17p) and standard-risk groups
  4. The values given in bold represent P-values <0.05, which are considered statistically significant