This was a study to estimate the proportion of participants with osteoarthritis of the knee(s) who were treated with oral or topical analgesics for their symptoms, who did and did not report adequate pain relief at Baseline and to characterize their pain level over a 12-month follow-up period.
Study Type
OBSERVATIONAL
Enrollment
1,261
All participants will be treated according to standard medical guidelines or usual clinical practice standards of the investigating physician.
Percentage of Participants Who Reported Adequate vs. Inadequate Pain Relief at Baseline
Participant pain at baseline was recorded using the Brief Pain Inventory (BPI). The BPI is an inventory of subject-reported questions, where for each pain severity item the response scale is 0 = No Pain and 10 = Worst Pain You Can Imagine. The questions refer to pain due to osteoarthritis in the affected knee in the last week: at its worst, at its least, on the average, and right now. Adequate pain control was defined as a score of \<=4 on question 5 of the BPI. Inadequate pain control was defined as a score \>4 on question 5 of the BPI. Question 5 of the BPI asked participants to rate their pain by circling the number that best describes their pain on the average scale from 0 to 10 (with 0=no pain and 10=worst pain imaginable).
Time frame: Baseline (Day 1)
Percentage of Participants Who Reported Adequate vs. Inadequate Pain Relief at Month 12
Participant pain at baseline was recorded using the Brief Pain Inventory (BPI). The BPI is an inventory of subject-reported questions, where for each pain severity item the response scale is 0 = No Pain and 10 = Worst Pain You Can Imagine. The questions refer to pain in the last week: at its worst, at its least, on the average, and right now. Adequate pain control was defined as a score of \<=4 on question 5 of the BPI. Inadequate pain control was defined as a score \>4 on question 5 of the BPI. Question 5 of the BPI asked participants to rate their pain by circling the number that best describes their pain on the average scale from 0 to 10 (with 0=no pain and 10=worst pain imaginable).
Time frame: Month 12
Percentage of Participants Who Reported Adequate Relief From Joint Stiffness or Limitation in Physical Function at Baseline (Day 1)
Joint stiffness or limitation in physical function was evaluated using the Western Ontario and McMasters Universities (WOMAC) visual analog (VA)3.0 Index. The WOMAC VA 3.0 is a self-administered, tri-dimensional, disease-specific health status measure. It probes clinically important, subject-relevant symptoms in the areas of pain, joint stiffness and physical function in subjects with osteoarthritis of the knee. The index consists of 24 questions (5 pain, 2 stiffness and 17 physical function) and uses a VA scale of 0-500 mm for pain, 0-200 mm for stiffness, and 0-1700 for physical limitation with higher scores indicating poorer outcomes. Adequate pain was defined as participants reporting less than 4 on the BPI average pain scale.
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Time frame: Baseline (Day 1)
Percentage of Participants Who Reported Adequate Relief From Joint Stiffness or Limitation in Physical Function at Month 1
Joint stiffness or limitation in physical function was evaluated using the Western Ontario McMaster Osteoarthritis (WOMAC) visual analog (VA)3.0 Index. The WOMAC VA 3.0 is a self-administered, tri-dimensional, disease-specific health status measure. It probes clinically important, subject-relevant symptoms in the areas of pain, joint stiffness and physical function in subjects with osteoarthritis of the knee. The index consists of 24 questions (5 pain, 2 stiffness and 17 physical function) and uses a VA scale of 0-500 mm for pain, 0-200 mm for stiffness, and 0-1700 for physical limitation with higher scores indicating poorer outcomes. Adequate pain was defined as participants reporting less than 4 on the BPI average pain scale.
Time frame: Month 1
Percentage of Participants Who Reported Adequate Relief From Joint Stiffness or Limitation in Physical Function at Month 3
Joint stiffness or limitation in physical function was evaluated using the Western Ontario and McMasters Universities (WOMAC) visual analog (VA)3.0 Index. The WOMAC VA 3.0 is a self-administered, tri-dimensional, disease-specific health status measure. It probes clinically important, subject-relevant symptoms in the areas of pain, joint stiffness and physical function in subjects with osteoarthritis of the knee. The index consists of 24 questions (5 pain, 2 stiffness and 17 physical function) and uses a VA scale of 0-500 mm for pain, 0-200 mm for stiffness, and 0-1700 for physical limitation with higher scores indicating poorer outcomes. Adequate pain was defined as participants reporting less than 4 on the BPI average pain scale.
Time frame: Month 3
Percentage of Participants Who Reported Adequate Relief From Joint Stiffness or Limitation in Physical Function at Month 6
Joint stiffness or limitation in physical function was evaluated using the Western Ontario and McMasters Universities (WOMAC) visual analog (VA)3.0 Index. The WOMAC VA 3.0 is a self-administered, tri-dimensional, disease-specific health status measure. It probes clinically important, subject-relevant symptoms in the areas of pain, joint stiffness and physical function in subjects with osteoarthritis of the knee. The index consists of 24 questions (5 pain, 2 stiffness and 17 physical function) and uses a VA scale of 0-500 mm for pain, 0-200 mm for stiffness, and 0-1700 for physical limitation with higher scores indicating poorer outcomes. Adequate pain was defined as participants reporting less than 4 on the BPI average pain scale.
Time frame: Month 6
Percentage of Participants Who Reported Adequate Relief From Joint Stiffness or Limitation in Physical Function at Month 9
Joint stiffness or limitation in physical function was evaluated using the Western Ontario and McMasters Universities (WOMAC) visual analog (VA)3.0 Index. The WOMAC VA 3.0 is a self-administered, tri-dimensional, disease-specific health status measure. It probes clinically important, subject-relevant symptoms in the areas of pain, joint stiffness and physical function in subjects with osteoarthritis of the knee. The index consists of 24 questions (5 pain, 2 stiffness and 17 physical function) and uses a VA scale of 0-500 mm for pain, 0-200 mm for stiffness, and 0-1700 for physical limitation with higher scores indicating poorer outcomes. Adequate pain was defined as participants reporting less than 4 on the BPI average pain scale.
Time frame: Month 9
Percentage of Participants Who Reported Adequate Relief From Joint Stiffness or Limitation in Physical Function at Month 12
Joint stiffness or limitation in physical function was evaluated using the Western Ontario and McMasters Universities (WOMAC) visual analog (VA)3.0 Index. The WOMAC VA 3.0 is a self-administered, tri-dimensional, disease-specific health status measure. It probes clinically important, subject-relevant symptoms in the areas of pain, joint stiffness and physical function in subjects with osteoarthritis of the knee. The index consists of 24 questions (5 pain, 2 stiffness and 17 physical function) and uses a VA scale of 0-500 mm for pain, 0-200 mm for stiffness, and 0-1700 for physical limitation with higher scores indicating poorer outcomes. Adequate pain was defined as participants reporting less than 4 on the BPI average pain scale.
Time frame: Month 12