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NCT00422383 · OUTCOME

Maximum Observed Serum Concentrations Following the 1st Infusion of Rituximab (Cfirst) in the 1st and 2nd Courses of Treatment in Micrograms Per mL (µg/mL)

A Study of Retreatment With MabThera (Rituximab) in Combination With Methotrexate in Patients With Rheumatoid Arthritis (RA) · Source last updated 2015-05-04

Results reported by the registry submitting party. Population, time horizon, units and missing values must be read together.

Measure
MEAN
Unit
µg/mL
Interval / dispersion
Standard Deviation
Time frame
Days 1 and 15 (before infusion and 30 minutes following infusion) and Weeks 4, 8, 16, 24, 26, 28, 32, 40, and 48 or early withdrawal and at Weeks 24 and 48 of safety follow-up (1 year period following the completion of study treatment).

What was measured

Cfirst values were estimated from rituximab serum concentrations by non-compartmental methods using the software WinNonlin Enterprise Version 5.2.

Analysis population: ITT-M2 population, n = number of participants analyzed for the given parameter at the specified timepoint.

Groups in this outcome

Rituximab Low Dose + Methotrexate

Participants received rituximab, 0.5 g, IV, on Days 1, 15, 168, and 182. Participants also received methylprednisolone 100 mg, IV, by slow infusion, which was completed at least 30 minutes prior to each infusion of rituximab Days 1, 15, 168, and 182. Participants also received methotrexate 10-25 mg/mL, PO or parenterally, as prescribed by the treating physician and in accordance with the local label. Participants also received a stable dose of folate ≥ 5 mg/week given either as a single dose or as a divided weekly dose.

Rituximab Escalated Dose + Methotrexate

Participants received rituximab, 0.5 g, IV, on Days 1 and 15 and 1.0 g, IV, on Days 168 and 182. Participants also received methylprednisolone 100 mg, IV, by slow infusion, which was completed at least 30 minutes prior to each infusion of rituximab Days 1, 15, 168, and 182. Participants also received methotrexate 10-25 mg/mL, PO or parenterally, as prescribed by the treating physician and in accordance with the local label. Participants also received a stable dose of folate ≥ 5 mg/week given either as a single dose or as a divided weekly dose.

Rituximab High Dose + Methotrexate

Participants received rituximab, 1.0 g, IV, on Days 1, 15, 168, and 182. Participants also received methylprednisolone 100 mg, IV, by slow infusion, which was completed at least 30 minutes prior to each infusion of rituximab Days 1, 15, 168, and 182. Participants also received methotrexate 10-25 mg/mL, PO or parenterally, as prescribed by the treating physician and in accordance with the local label. Participants also received a stable dose of folate ≥ 5 mg/week given either as a single dose or as a divided weekly dose.

Group identifiers and denominators belong to this outcome only. They may differ in another outcome or in safety reporting.

Analysis denominator · Participants

GroupSource count
Rituximab Low Dose + Methotrexate121
Rituximab Escalated Dose + Methotrexate112
Rituximab High Dose + Methotrexate91

Reported measurements

First Course (n=121,112,91)
Values in µg/mL · Interval/dispersion: Standard Deviation
GroupValueSpreadLowerUpperComment
Rituximab Low Dose + Methotrexate16542Not reportedNot reportedNot reported
Rituximab Escalated Dose + Methotrexate16339Not reportedNot reportedNot reported
Rituximab High Dose + Methotrexate31794Not reportedNot reportedNot reported
Second Course (n=120,105,84)
Values in µg/mL · Interval/dispersion: Standard Deviation
GroupValueSpreadLowerUpperComment
Rituximab Low Dose + Methotrexate17741Not reportedNot reportedNot reported
Rituximab Escalated Dose + Methotrexate34592Not reportedNot reportedNot reported
Rituximab High Dose + Methotrexate35086Not reportedNot reportedNot reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        spread
        42
        value
        165
      2. group Id
        OG001
        spread
        39
        value
        163
      3. group Id
        OG002
        spread
        94
        value
        317
    title
    First Course (n=121,112,91)
  2. categories
    1. measurements
      1. group Id
        OG000
        spread
        41
        value
        177
      2. group Id
        OG001
        spread
        92
        value
        345
      3. group Id
        OG002
        spread
        86
        value
        350
    title
    Second Course (n=120,105,84)
denoms
  1. counts
    1. group Id
      OG000
      value
      121
    2. group Id
      OG001
      value
      112
    3. group Id
      OG002
      value
      91
    units
    Participants
description
Cfirst values were estimated from rituximab serum concentrations by non-compartmental methods using the software WinNonlin Enterprise Version 5.2.
dispersion Type
Standard Deviation
groups
  1. description
    Participants received rituximab, 0.5 g, IV, on Days 1, 15, 168, and 182. Participants also received methylprednisolone 100 mg, IV, by slow infusion, which was completed at least 30 minutes prior to each infusion of rituximab Days 1, 15, 168, and 182. Participants also received methotrexate 10-25 mg/mL, PO or parenterally, as prescribed by the treating physician and in accordance with the local label. Participants also received a stable dose of folate ≥ 5 mg/week given either as a single dose or as a divided weekly dose.
    id
    OG000
    title
    Rituximab Low Dose + Methotrexate
  2. description
    Participants received rituximab, 0.5 g, IV, on Days 1 and 15 and 1.0 g, IV, on Days 168 and 182. Participants also received methylprednisolone 100 mg, IV, by slow infusion, which was completed at least 30 minutes prior to each infusion of rituximab Days 1, 15, 168, and 182. Participants also received methotrexate 10-25 mg/mL, PO or parenterally, as prescribed by the treating physician and in accordance with the local label. Participants also received a stable dose of folate ≥ 5 mg/week given either as a single dose or as a divided weekly dose.
    id
    OG001
    title
    Rituximab Escalated Dose + Methotrexate
  3. description
    Participants received rituximab, 1.0 g, IV, on Days 1, 15, 168, and 182. Participants also received methylprednisolone 100 mg, IV, by slow infusion, which was completed at least 30 minutes prior to each infusion of rituximab Days 1, 15, 168, and 182. Participants also received methotrexate 10-25 mg/mL, PO or parenterally, as prescribed by the treating physician and in accordance with the local label. Participants also received a stable dose of folate ≥ 5 mg/week given either as a single dose or as a divided weekly dose.
    id
    OG002
    title
    Rituximab High Dose + Methotrexate
param Type
MEAN
population Description
ITT-M2 population, n = number of participants analyzed for the given parameter at the specified timepoint.
reporting Status
POSTED
time Frame
Days 1 and 15 (before infusion and 30 minutes following infusion) and Weeks 4, 8, 16, 24, 26, 28, 32, 40, and 48 or early withdrawal and at Weeks 24 and 48 of safety follow-up (1 year period following the completion of study treatment).
title
Maximum Observed Serum Concentrations Following the 1st Infusion of Rituximab (Cfirst) in the 1st and 2nd Courses of Treatment in Micrograms Per mL (µg/mL)
type
SECONDARY
unit Of Measure
µg/mL

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Preserved source evidence · Not medical advice