Title

Study of Diclofenac Capsules to Treat Osteoarthritis Pain
A Phase 3, Multicenter, Randomized, Double-Blind, Placebo-Controlled, Fixed-Dose, Parallel-Group, Efficacy and Safety Study of Diclofenac [Test] Capsules in Subjects With Osteoarthritis of the Knee or Hip
  • Phase

    Phase 3
  • Study Type

    Interventional
  • Intervention/Treatment

    diclofenac ...
  • Study Participants

    305
The purpose of this study is to determine whether Diclofenac [Test] Capsules are safe and effective for the treatment of osteoarthritis pain of the hip or knee.
Study Started
Oct 31
2011
Primary Completion
Mar 31
2012
Study Completion
Oct 31
2012
Results Posted
May 26
2014
Estimate
Last Update
May 26
2014
Estimate

Drug Diclofenac

35 mg bid Capsules

Drug Diclofenac

35 mg tid Capsules

Drug Placebo

Capsules

Diclofenac Capsules 35 mg bid Experimental

Diclofenac Capsules 35 mg tid Experimental

Placebo Capsule Placebo Comparator

Criteria

Inclusion Criteria:

Primary diagnosis of Functional Class I-III OA of the hip or knee with documented osteoarthritis flare at baseline
Chronic user of nonsteroidal anti-inflammatory drugs (NSAIDs) and/or acetaminophen for OA pain
Discontinued all analgesic therapy at Screening
For women of child-bearing potential: a woman who is not pregnant and not nursing, and who is practicing an acceptable method of birth control

Exclusion Criteria:

History of allergic reaction or clinically significant intolerance to acetaminophen, aspirin, or any NSAIDS, including diclofenac
Requires continuous use of opioid or opioid combination products to control OA pain of the knee or hip
Clinically significant unstable cardiac, respiratory, neurological, immunological, hematological, or renal disease
Significant difficulties swallowing capsules or unable to tolerate oral medication
Previous participation in another clinical study of Diclofenac Capsules or received any investigational drug or device or investigational therapy within 30 days before Screening.

Summary

Diclofenac 35 mg Two Times Daily

Diclofenac 35 mg Three Times Daily

Placebo

All Events

Event Type Organ System Event Term Diclofenac 35 mg Two Times Daily Diclofenac 35 mg Three Times Daily Placebo

Change From Baseline to Week 12 After Trial Entry in Osteoarthritis Pain Measured on the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain Subscale Score.

The pain in subjects with osteoarthritis was measured using the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain subscale score. The WOMAC pain subscale score is calculated as the average of the visual analogue scale (VAS) scores from 5 pain subscale questions. Subjects mark the VAS, which is a horizontal line 100 mm in length, with a single vertical line to indicate their pain level over the last 24 hours, with 0 mm representing "No Pain" and 100 mm representing "Extreme Pain". The WOMAC pain subscale score difference is calculated as the WOMAC pain subscale score assessed at Week 12 minus the WOMAC pain subscale score assessed at baseline.

Diclofenac 35 mg Two Times Daily

-39.04
mm (Least Squares Mean)
Standard Error: 2.905

Diclofenac 35 mg Three Times Daily

-44.14
mm (Least Squares Mean)
Standard Error: 3.070

Placebo

-32.46
mm (Least Squares Mean)
Standard Error: 2.937

Change From Baseline to Week 2 After Trial Entry in Osteoarthritis Pain Measured on the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain Subscale Score.

The pain in subjects with osteoarthritis was measured using the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain subscale score. The WOMAC pain subscale score is calculated as the average of the visual analogue scale (VAS) scores from 5 pain subscale questions. Subjects mark the VAS, which is a horizontal line 100 mm in length, with a single vertical line to indicate their pain level over the last 24 hours, with 0 mm representing "No Pain" and 100 mm representing "Extreme Pain". The WOMAC pain subscale score difference was calculated as the WOMAC pain subscale score assessed at Week 2 minus the WOMAC pain subscale score assessed at baseline.

Diclofenac 35 mg Two Times Daily

-31.4
mm (Least Squares Mean)
Standard Error: 2.742

Diclofenac 35 mg Three Times Daily

-37.42
mm (Least Squares Mean)
Standard Error: 2.907

Placebo

-21.6
mm (Least Squares Mean)
Standard Error: 2.787

Change From Baseline to Week 6 After Trial Entry in Osteoarthritis Pain Measured on the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain Subscale Score.

The pain in subjects with osteoarthritis was measured using the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain subscale score. The WOMAC pain subscale score is calculated as the average of the visual analogue scale (VAS) scores from 5 pain subscale questions. Subjects mark the VAS, which is a horizontal line 100 mm in length, with a single vertical line to indicate their pain level over the last 24 hours, with 0 mm representing "No Pain" and 100 mm representing "Extreme Pain". The WOMAC pain subscale score difference was calculated as the WOMAC pain subscale score assessed at Week 6 minus the WOMAC pain subscale score assessed at baseline.

Diclofenac 35 mg Two Times Daily

-36.64
mm (Least Squares Mean)
Standard Error: 2.889

Diclofenac 35 mg Three Times Daily

-43.51
mm (Least Squares Mean)
Standard Error: 3.051

Placebo

-31.08
mm (Least Squares Mean)
Standard Error: 2.922

Change From Baseline to the Average of Weeks 2, 6, and 12 After Trial Entry in Osteoarthritis Pain Measured on the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain Subscale Score.

The pain in subjects with osteoarthritis was measured using the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain subscale score. The WOMAC pain subscale score is calculated as the average of the visual analogue scale (VAS) scores from 5 pain subscale questions. Subjects mark the VAS, which is a horizontal line 100 mm in length, with a single vertical line to indicate their pain level over the last 24 hours, with 0 mm representing "No Pain" and 100 mm representing "Extreme Pain". The WOMAC pain subscale score difference was calculated as the WOMAC pain subscale score assessed at Weeks 2, 6, and 12 minus the average of the WOMAC pain subscale score assessed at baseline.

Diclofenac 35 mg Two Times Daily

-35.62
mm (Least Squares Mean)
Standard Error: 2.633

Diclofenac 35 mg Three Times Daily

-41.38
mm (Least Squares Mean)
Standard Error: 2.796

Placebo

-28.14
mm (Least Squares Mean)
Standard Error: 2.647

Change From Baseline to the Average of Weeks 2, 6, and 12 After Trial Entry in Osteoarthritis Pain, Stiffness, and Function Measured Using the Total (Composite) Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Score.

Pain, stiffness, and function in subjects with osteoarthritis were measured using the Western Ontario and McMaster Universities (WOMAC) Index, which is a 24-item questionnaire. The total (composite) WOMAC score is calculated as the average of the mean visual analogue scale (VAS) scores from the questions in the pain, stiffness, and function subscales. Subjects mark the VAS, which is a horizontal line 100 mm in length, with a single vertical line to indicate their response to each of the questions, with 0 mm representing "No Pain, Stiffness, or Difficulty" and 100 mm representing "Extreme Pain, Stiffness, and Difficulty". The total (composite) WOMAC score difference was calculated as the total (composite) WOMAC score assessed at Weeks 2, 6, and 12 minus the total (composite) WOMAC score assessed at baseline.

Diclofenac 35 mg Two Times Daily

-30.25
mm (Least Squares Mean)
Standard Error: 2.632

Diclofenac 35 mg Three Times Daily

-35.86
mm (Least Squares Mean)
Standard Error: 2.798

Placebo

-23.22
mm (Least Squares Mean)
Standard Error: 2.656

Change From Baseline to the Average of Weeks 2, 6, and 12 After Trial Entry in Pain Intensity Difference Measured Using the 100-mm Visual Analogue Scale.

The pain intensity is assessed using a visual analogue scale (VAS), which is a horizontal line 100 mm in length. Subjects mark the VAS with a single vertical line to indicate their current pain level, with 0 mm representing "No Pain" and 100 mm representing "Worst Pain Imaginable". The VAS pain intensity difference is calculated as the average of the VAS pain intensity scores at Weeks 2, 6, and 12 minus the VAS pain intensity at baseline.

Diclofenac 35 mg Two Times Daily

-36.41
mm (Least Squares Mean)
Standard Error: 2.670

Diclofenac 35 mg Three Times Daily

-41.33
mm (Least Squares Mean)
Standard Error: 2.830

Placebo

-30.95
mm (Least Squares Mean)
Standard Error: 2.690

Total

305
Participants

Age, Continuous

61.6
years (Mean)
Standard Deviation: 8.87

Baseline Pain Intensity Visual Analogue Scale Score

71.0
mm (Mean)
Standard Deviation: 19.35

Baseline Total (Composite) Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Sc

71.54
mm (Mean)
Standard Deviation: 16.27

Baseline Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain Subscale Score

74.93
mm (Mean)
Standard Deviation: 15.61

Body Mass Index

31.2
kg/m^2 (Mean)
Standard Deviation: 5.16

Height

168.76
cm (Mean)
Standard Deviation: 9.898

Weight

88.97
kg (Mean)
Standard Deviation: 17.167

Ethnicity (NIH/OMB)

Race/Ethnicity, Customized

Sex: Female, Male

Overall Study

Diclofenac 35 mg Two Times Daily

Diclofenac 35 mg Three Times Daily

Placebo

Drop/Withdrawal Reasons

Diclofenac 35 mg Two Times Daily

Diclofenac 35 mg Three Times Daily

Placebo