Table 3 Primary outcome (complete remission rate after 3 cycles) and secondary outcomes of effectiveness, including best-documented response achieved during whole treatment course, progression-free survival and overall survival

From: High-dose methotrexate-based immuno-chemotherapy for elderly primary CNS lymphoma patients (PRIMAIN study)

Response after three cycles

R-MPL (N=69)

R-MP (N=38)

All (N=107)

CR

26 (37.7, 26.5–50.2)

12 (31.6, 18.0–48.8)

38 (35.5, 26.5–45.4)

PR

6 (8.7, 3.6–18.6)

9 (23.7, 12.0–40.6)

15 (14.0, 8.3–22.4)

SD

0

0

0

PD/relapse

8 (11.6, 5.5–22.1)

4 (10.5, 3.4–25.7)

12 (11.2, 6.2–19.1)

Not done

29 (42.0, 30.4–54.5)

13 (34.2, 20.1–51.4)

42 (42.1, 32.7–52.0)

Best response achieved

 CR

30 (43.5, 31.8–55.9)

15 (39.5, 24.5–56.5)

45 (42.1, 32.7–52.0)

 PR

20 (29.0, 19.0–41.3)

14 (36.8, 22.3–54.0)

34 (31.8, 23.3–41.6)

 SD

1 (1.4, 0.08–8.9)

0

1 (0.9, 0.05–5.8)

 PD

1 (1.4, 0.08–8.9)

1 (2.6, 0.1–15.4)

2 (1.9, 0.3–7.3)

 Not done

17 (24.6, 15.4–36.7)

8 (21.1, 10.1–37.8)

25 (23.4, 16.0–32.7)

Progression-free survival

 Median months (95% CI)

9.6 (4.8–24.0)

11.2 (5.7–27.3)

10.3 (6.5–15.9)

 1-year rate % (95% CI)

44.9 (33.2–56.7)

48.9 (32.8–65.0)

46.3 (36.8–55.8)

 2-year rate % (95% CI)

38.8 (27.2–50.4)

34.9 (19.3–50.4)

37.3 (28.0–46.6)

Overall survival

 Median months (95% CI)

15.4 (7.7–44.8)

22.6 (10.3 – inf)

20.7 (10.7–44.8)

 1-year rate % (95% CI)

53.6 (41.9–65.4)

62.4 (46.8–78.0)

56.7 (47.2–66.1)

 2-year rate % (95% CI)

46.0 (34.1–57.8)

47.9 (30.4–65.3)

47.0 (37.3–56.7)

  1. Abbreviations: CI, confidence interval; CR, complete remission; PD, progressive disease; PR, partial remission; R-MP, rituximab, methotrexate and procarbazine; R-MPL, rituximab, methotrexate, procarbazine and lomustine; SD, stable disease.
  2. Numbers are frequencies (proportion, 95% CI) if not stated otherwise.