Table 2 Baseline clinical characteristics

From: Risk stratification in myeloma by detection of circulating plasma cells prior to autologous stem cell transplantation in the novel agent era

Baseline characteristics

Overall (n=840)

CPCs absent (n=678)

CPCs present (n=162)

P-value

Median age at transplant (range), years

61.1 (24.4–76.1)

61.4 (24.4–76.1)

59.9 (32.2–73.8)

0.068

Males (%)

59.6

61.2

53.1

0.060

ISS stage, n (%)

   

0.004

 Stage I

161 (19.2)

143 (21.1)

18 (11.1)

 

 Stage II

313 (37.3)

257 (37.9)

56 (34.6)

 

 Stage III

204 (24.3)

156 (23.0)

48 (29.6)

 

 Missing

162 (19.3)

122 (18.0)

40 (24.7)

 

Median time from diagnosis to transplant (range), months

6.1 (1.3–11.9)

6.1 (1.3–11.9)

6.3 (2.4–11.9)

0.215

FISH cytogeneticsa, n (%)

   

0.001

 High risk

191 (22.7)

138 (20.4)

53 (32.7)

 

 Standard risk

551 (65.6)

453 (66.8)

98 (60.5)

 

 Missing

98 (11.7)

87 (12.8)

11 (6.8)

 

Pre-transplant response, n (%)

   

<0.001

 CR

136 (16.2)

128 (18.9)

8 (4.9)

 

 VGPR

221 (26.3)

193 (28.5)

28 (17.3)

 

 PR

346 (41.2)

284 (41.9)

62 (38.3)

 

 MR or SD

93 (11.1)

57 (8.4)

36 (22.2)

 

 PD

44 (5.2)

16 (2.4)

28 (17.3)

 

Induction regimen

 PI-based only, n (%)

297 (35.4)

255 (37.6)

42 (25.9)

0.004

 IMiD-based only, n (%)

256 (30.5)

206 (30.4)

50 (30.9)

0.905

 PI- and IMiD-based, n (%)

277 (33.0)

211 (31.1)

66 (40.7)

0.021

Melphalan dose, n (%)

   

0.938

 Full

740 (88.1)

597 (88.1)

143 (88.3)

 

 Reduced

100 (11.9)

81 (11.9)

19 (11.7)

 

Post-transplant maintenance or consolidation, n (%)

321 (38.2)

262 (38.6)

59 (36.4)

0.600

  1. Abbreviations: CPC, circulating plasma cell; CR, complete response; FISH, fluorescence in situ hybridization; IMiD, immunomodulator; ISS, International staging system; MR, minimal response; PD, progressive disease; PI, proteasome inhibitor; PR, partial response; SD, stable disease; VGPR, very good partial response.
  2. aHigh-risk FISH cytogenetics was defined by t(4;14), del(17p), t(14;16), t(14;20) and +1q.