Efficacy And Safety Study Of Tanezumab Subcutaneous Administration In Osteoarthritis - A Subcutaneous/Intravenous Bridging Study

Change From Baseline in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Physical Function Subscale at Weeks 1, 2, 4, 8, and 12

The WOMAC physical function subscale is a 17-item questionnaire used to assess the degree of difficulty experienced due to osteoarthritis in the index joint in the past 48 hours. It is calculated as the mean of the scores from the 17 individual questions scored on a NRS of 0 to 10, where higher scores indicate worse function. Total score range for WOMAC physical function subscale score is 0 to 10, where higher scores indicate worse function.

Time frame: Baseline, Weeks 1, 2, 4, 8, and 12

Change From Baseline in Patient Global Assessment (PGA) of Osteoarthritis at Weeks 1, 2, 4, 8, and 12

Participants answered the question: "Considering all the ways your osteoarthritis in your knee affects you, how are you doing today?" Participants responded by using a 5-point scale where 1 = very good (asymptomatic and no limitation of normal activities), 2 = good (mild symptoms and no limitation of normal activities), 3 = fair (moderate symptoms and limitation of some normal activities), 4 = poor (severe symptoms and inability to carry out most normal activities) and 5 = very poor (very severe symptoms which are intolerable and inability to carry out all normal activities). Higher score indicated severe condition.

Time frame: Baseline, Weeks 1, 2, 4, 8, and 12

Percentage of Participants With Outcome Measures in Rheumatology - Osteoarthritis Research Society International (OMERACT-OARSI) Response

The OMERACT-OARSI responder index is based on 3 parameters. OMERACT-OARSI response: greater than or equal to (\>=) 50 percent (%) improvement from baseline and absolute change from baseline of \>=2 units at week of interest in WOMAC pain or physical function subscale, or at least 2 of the following 3 being true: \>=20% improvement from baseline and absolute change from baseline of \>=1 unit at week of interest in 1) WOMAC pain subscale, 2) WOMAC physical function subscale, 3) PGA of osteoarthritis (score range: 1-5, higher score=more affected). WOMAC pain, physical function subscales assess amount of pain/difficulty experienced (score range: 0-10, higher score=higher pain/difficulty).

Time frame: Weeks 1, 2, 4, 8, 12, and 16

Percentage of Participants With at Least 30%, 50%, 70% and 90% Reduction From Baseline in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain Subscale Score

The WOMAC pain subscale is a 5-item questionnaire used to assess the amount of pain experienced due to osteoarthritis in the index knee in the past 48 hours. It is calculated as the mean of the scores from the 5 individual questions scored on a numerical rating scale (NRS) of 0 to 10, where higher scores indicate higher pain. Total score range for WOMAC pain subscale score is 0 to 10, where higher scores indicate higher pain.

Time frame: Weeks 1, 2, 4, 8, 12, and 16

Number of Participants With Cumulative Reduction From Baseline in Western Ontario and McMaster Universities Osteoarthritis (WOMAC) Pain Subscale Score at Weeks 1, 2, 4, 8, 12, and 16

The WOMAC pain subscale is a 5-item questionnaire used to assess the amount of pain experienced due to osteoarthritis in the index knee in the past 48 hours. It is calculated as the mean of the scores from the 5 individual questions scored on a NRS of 0 to 10, where higher scores indicate higher pain. Total score range for WOMAC pain subscale score is 0 to 10, where higher scores indicate higher pain. Participants with specified reduction (as percent) from baseline at Week 16 are reported.

Time frame: Weeks 1, 2, 4, 8, 12, 16

Number of Participants With Improvement of at Least 2 Points in Patient's Global Assessment (PGA) of Osteoarthritis

Participants answered the question: "Considering all the ways your osteoarthritis in your knee affects you, how are you doing today?" Participants responded by using a 5-point scale where 1 = very good (asymptomatic and no limitation of normal activities), 2 = good (mild symptoms and no limitation of normal activities), 3 = fair (moderate symptoms and limitation of some normal activities), 4 = poor (severe symptoms and inability to carry out most normal activities) and 5 = very poor (very severe symptoms which are intolerable and inability to carry out all normal activities). Higher score indicated severe condition. Improvement signifies a decrease of at least 2 points on the 5-point scale relative to baseline value.

Time frame: Weeks 1, 2, 4, 8, 12, and 16

Change From Baseline in Average Pain Score in the Index Knee at Weeks 1, 2, 4, 8, 12 and 16

Participants assessed average osteoarthritis pain in their knee in the past 24 hours on an 11-point NRS ranging from 0 (no pain) to 10 (worst pain). Higher score indicated greater pain. Baseline score was calculated as the mean of the scores over the 3 days in the initial pain assessment period and a weekly mean was calculated using the daily pain scores within each study week.

Time frame: Baseline, Weeks 1, 2, 4, 8, 12, and 16

Change From Baseline in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Stiffness Subscale Score at Weeks 1, 2, 4, 8, 12, and 16

The WOMAC stiffness subscale is a 2-item questionnaire used to assess the amount of stiffness experienced in the index joint in the past 48 hours. It is calculated as the mean of the scores from the 2 individual questions scored on NRS of 0 to 10, with higher scores indicating more stiffness. Total score range for WOMAC stiffness subscale score is 0 to 10, where higher scores indicate more stiffness. Stiffness is defined as a sensation of decreased ease in movement of the knee.

Time frame: Baseline, Weeks 1, 2, 4, 8, 12, and 16

Change From Baseline in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Average Score at Weeks 1, 2, 4, 8, 12, and 16

WOMAC: self-administered, disease-specific 24-item questionnaire, which assesses clinically important, participant-relevant symptoms for pain (5 items), stiffness (2 items) and physical function (17 items) in participants with osteoarthritis of knee. WOMAC average score is the mean of WOMAC pain, physical function and stiffness subscale scores. WOMAC pain, physical function and stiffness subscale and average score ranges from 0 to 10, where higher score indicates worse response.

Time frame: Baseline, Weeks 1, 2, 4, 8, 12, and 16

Change From Baseline For Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain Subscale Item: Pain When Walking on a Flat Surface at Weeks 1, 2, 4, 8, 12, and 16

Participants answered: "How much pain have you had when walking on a flat surface?" Participants responded by using a NRS of 0 to 10, where 0 = no pain and 10 = extreme pain. Higher score indicated greater pain.

Time frame: Baseline, Weeks 1, 2, 4, 8, 12, and 16

Change From Baseline For Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain Subscale Item: Pain When Going Up or Down Stairs at Weeks 1, 2, 4, 8, 12, and 16

Participants answered: "How much pain have you had when going up or down stairs?" Participants responded by using a NRS of 0 to 10, where 0 = no pain and 10 = extreme pain. Higher score indicated greater pain.

Time frame: Baseline, Weeks 1, 2, 4, 8, 12, and 16

Change From Baseline in 36-Item Short-Form Health Survey Version 2 (SF-36v2) Domain Scores at Week 16

SF-36v2 is a standardized self-administered survey evaluating 8 aspects/domains of functional health and well-being: physical and social functioning, physical and emotional role limitations, bodily pain, general health, vitality, mental health. The total score for each domain is scaled 0-100 (100 = highest level of functioning).

Time frame: Baseline, Week 16

Change From Baseline in 36-Item Short-Form Health Survey Version 2 (SF-36v2) Physical and Mental Component Scores at Week 16

SF-36v2: standardized self-administered survey evaluating 8 aspects of functional health and wellbeing (physical and social functioning, physical and emotional role limitations, bodily pain, general health, vitality, mental health). Total score for each aspect were scaled 0-100 (100=highest level of functioning). For obtaining physical and mental component scores, z-score for each scale=(observed score - mean score for general 1990 United States \[US\] population)/corresponding standard deviation. The 2 component scores were obtained by multiplying each aspect z-score by physical or mental factor score coefficient (1990 general US population) and summing the eight products. Component scores indicated how many standard deviations higher (in case of positive z-score \[better functioning\])/lower (in case of negative z-score \[worse functioning\]) participant's value was relative to the mean of the reference population.

Time frame: Baseline, Week 16

Time to Discontinuation Due to Lack of Efficacy

Median time to discontinuation due to lack of efficacy for participants who discontinued due to lack of efficacy was reported.

Time frame: Baseline up to Week 24

Percentage of Participants Who Used Rescue Medication

In case of inadequate pain relief for osteoarthritis, acetaminophen up to 3000 mg per day up to 3 days per week could be taken as rescue medication. Incidence of rescue medication use is calculated as any use of rescue medication during the study week in question.

Time frame: Weeks 1, 2, 4, 8, 12, and 16

Duration of Rescue Medication Use

In case of inadequate pain relief for osteoarthritis, acetaminophen up to 3000 mg per day up to 3 days per week could be taken as rescue medication. Duration of rescue medication use is calculated as the number of study days per week when any rescue medication was taken.

Time frame: Weeks 1, 2, 4, 8, 12, and 16

Amount of Rescue Medication Taken

In case of inadequate pain relief for osteoarthritis, acetaminophen up to 3000 mg per day up to 3 days per week could be taken as rescue medication. The amount of rescue medication taken is the total dose (in mg) of acetaminophen rescue medication over the study week in question.

Time frame: Weeks 1, 2, 4, 8, 12, and 16