A Study of Duloxetine (LY248686) in Participants With Chronic Osteoarthritis and Knee Pain in Japan

Brief Pain Inventory Severity: Average Pain Score: A self-reported scale that measures the severity of pain based on the average pain experienced during the past 24-hours. The severity scores ranged from 0 (no pain) to 10 (pain as severe as you can imagine). Least squares (LS) mean was calculated using a mixed-effects model repeated measures (MMRM) approach including administration groups, observation points, and interaction between the administration groups and observation points as fixed effects, and BPI average pain severity at baseline as covariates.

Patient's Global Impressions of Improvement Scale: PGI-I measures a participant's perception of improvement at the time of assessment compared with the start of treatment. Score ranges from 1 (very much better) to 7 (very much worse). Least squares (LS) mean was calculated using a mixed-effects model repeated measures (MMRM) approach including administration groups, observation points, and interaction between the administration groups and observation points as fixed effects, and PGI-severity at baseline as covariates.

CSI-S measures severity of illness at the time of assessment compared with start of treatment with scores ranging from 1 (normal, not at all ill) to 7 (among the most extremely ill participants). Least squares (LS) mean was calculated using a mixed-effects model repeated measures (MMRM) approach including administration groups, observation points, and interaction between the administration groups and observation points as fixed effects, and baseline data as covariates.

36-item Short-Form Health Survey: SF-36 Health Status Survey is a generic, health-related scale assessing participant's quality of life on 8 domains: physical functioning, social functioning, bodily pain, vitality, mental health, role-physical, role-emotional and general health. Domain scores: general health (range: 5-25); physical functioning (range: 10-30); role-physical (range: 4-8); role-emotional (range: 3-15); social functioning (range: 2-10); bodily pain (range: 2-12); vitality (range: 4-20); mental health (range: 5-25). Each raw scale score was converted to a scale score ranging from 0-100 points, , with higher values representing a better outcome [(Raw score) - min{raw score}] / (max {raw score} - min{raw score}) x 100]. Least squares (LS) mean was calculated using Analysis of covariance (ANCOVA) approach including administration groups as fixed effects, and baseline data as covariate.

Beck Depression Inventory-II: BDI-II is a 21-item, participant-completed questionnaire to assess characteristics of depression. Each of the 21 items corresponding to symptoms of depression were scored on a 4-point scale ranging from 0 to 3 and was summed to give a single score. A total score of 0-13 was considered minimal range, 14-19 was mild, 20-28 was moderate, and 29-63 was severe. Least squares (LS) mean was calculated using a ANCOVA approach' including administration groups as fixed effects, and baseline data as covariate.

Participants evaluated their experience with and details of falls which were recorded.

The 24-question WOMAC Osteoarthritis Index assesses osteoarthritis symptoms using pain (5 questions), stiffness (2 questions) and physical function (17 questions) subscales. The WOMAC Osteoarthritis Index version 3.1 was administered according to the study schedule. The WOMAC total score was calculated for each participant at each time point for analysis as the mean total score, range 0 (none) -96 (extreme). Least squares (LS) mean was calculated using a mixed-effects model repeated measures (MMRM) approach including administration groups, observation points, and interaction between the administration groups and observation points as fixed effects, and baseline data as covariates.

The EQ-5D is a generic, multidimensional, health-related, quality-of-life instrument and was completed on five dimensions (mobility, self care, usual activities, pain/discomfort and anxiety/depression) to measure health-related quality of life on a scale from 0-1, with the higher score indicating a better health state perceived by the participant. The profile allows participants to rate their health state in 5 health domains: mobility, self-care, usual activities, pain/discomfort, and mood using a three level scale (no problem, some problems, and major problems). These combinations of attributes were converted into a weighted health-state Index Score according to the Japan population-based algorithm. Least squares (LS) mean was calculated using an ANCOVA approach including administration groups as fixed effects, and baseline data as covariate.

BPI-S and BPI-I are self-reported scales measuring severity of pain and interference on function. Severity scores: 0 (no pain) to 10 (severe pain) on each question assessing worst pain, least pain, and average pain in past 24 hours, and pain right now. Interference scores: 0 (does not interfere) to 10 (completely interferes) on each question assessing interference of pain in past 24 hours for general activity, mood, walking ability, normal work, relations with other people, sleep, and enjoyment of life. Average interference = average of non-missing scores of individual interference items. Least squares (LS) mean was calculated using a mixed-effects model repeated measures (MMRM) approach including administration groups, observation points, and interaction between the administration groups and observation points as fixed effects, and baseline data as covariates.

24-hour average pain severity scores were recorded daily on an 11-point Likert scale, an ordinal scale, with scores ranging from 0 (no pain) to 10 (worst possible pain). The 11-point Likert scale was also used for assessment of average pain within 24-hours.

24-hour average pain severity scores were recorded daily on an 11-point Likert scale, an ordinal scale, with scores ranging from 0 (no pain) to 10 (worst possible pain). The 11-point Likert scale was also used for assessment of average pain and worst pain within 24-hours. Least squares (LS) mean was calculated using a mixed-effects model repeated measures (MMRM) approach including administration groups, observation points, and interaction between the administration groups and observation points as fixed effects, and baseline data as covariates.

Brief Pain Inventory Severity: Average Pain Score: A self-reported scale that measures the severity of pain based on the average pain experienced during the past 24-hours. The severity scores ranged from 0 (no pain) to 10 (pain as severe as you can imagine).

A responder is required to meet at least one condition: reduction of ≥50% and ≥2 score in Weekly Mean of the 24-Hour Average Pain Score, reduction of ≥50% or ≥13.6 score in WOMAC (difficulty in dairy activity) and meet ≥2 out of following 3 conditions: reduction of ≥20% and ≥1 score in Weekly Mean of the 24-Hour Average Pain, reduction of ≥20% and ≥6.8 score in WOMAC (difficulty in dairy activity), PGAI score ≥2.

The WOMAC index (pain, stiffness, physical function subscales) was completed by the participant.The pain subscale had 5 questions on pain associated with every day tasks. Each question was answered using a 5-point Likert scale (0 to 4). The pain subscale has a range of scores of 0 (none) to 20 (extreme). Least squares (LS) mean was calculated using a mixed-effects model repeated measures (MMRM) approach including administration groups, observation points, and interaction between the administration groups and observation points as fixed effects, baseline data as covariates.

The WOMAC index (pain, stiffness, physical function subscales) will be completed by the participant.The stiffness subscale had 2 questions on stiffness associated with time of day (morning versus later in the day). Each question was answered using a 5-point Likert scale (0 to 4). The stiffness subscale has a range of scores of 0 (none) to 8 (extreme). Least squares (LS) mean was calculated using a mixed-effects model repeated measures (MMRM) approach including administration groups, observation points, and interaction between the administration groups and observation points as fixed effects, baseline data as covariates.

The WOMAC osteoarthritis scale consists of 24 items in 3 subscales: pain, stiffness, and physical function. The physical function subscale rates participant pain during stair use, rising from sitting, standing, bending, walking, getting in/out of a car, shopping, putting on/taking off socks, rising from bed, lying in bed, getting in/out of the bath, sitting, getting on/off the toilet, heavy household duties, and light household duties. Each question was answered using a 5-point Likert scale (0 to 4). Physical Function Subscale has a range of scores of 0 (none) to 68 (extreme). Least squares (LS) mean was calculated using a mixed-effects model repeated measures (MMRM) approach including administration groups, observation points, and interaction between the administration groups and observation points as fixed effects, baseline data as covariates.