TOSCARA Study: A Study of Subcutaneous Tocilizumab (RoActemra/Actemra) in Participants With Active Rheumatoid Arthritis Naïve to RoActemra/Actemra Treatment

The DAS28 score is a measure of the participant's disease activity calculated using the tender joint count of 28 joints (TJC28), swollen joint count of 28 joints (SJC28), patient's global assessment of disease activity visual analog scale (PGA VAS) with 0=no disease activity to 100=maximum disease activity displayed on the 100-millimeter (mm) horizontal VAS and acute phase reactant (erythrocyte sedimentation rate [ESR] or C-reactive protein [CRP]) for a total possible score of 0 to 10. For this study ESR was used to calculate the DAS28 score. The index is calculated using the following formula: DAS28 = (0.56*√[TJC28]) + (0.28*√[SJC28]) + (0.70*ln[ESR]) + (0.014*VAS). Higher scores represent higher disease activity. A negative change from baseline indicates an improvement.

The DAS28 score is a measure of the participant's disease activity calculated using the TJC28, SJC28, PGA VAS with 0=no disease activity to 100=maximum disease activity displayed on the 100-mm horizontal VAS and acute phase reactant (ESR or CRP) for a total possible score of 0 to 10. For this study ESR was used to calculate the DAS28 score. The index is calculated using the following formula: DAS28 = (0.56*√[TJC28]) + (0.28*√[SJC28]) + (0.70*ln[ESR]) + (0.014*VAS). Higher scores represent higher disease activity. A negative change from baseline indicates an improvement.

The ACR core set of outcome measures and their definition of improvement includes a >= 20% improvement (ACR20) compared to Baseline in both SJC and TJC as well as in three out of five additional parameters: Physician's Global Assessment of disease activity VAS, PGA VAS, patient's assessment of pain VAS, Health Assessment Questionnaire-Disability Index (HAQ-DI), and acute phase reactant (CRP or ESR). VAS range for all assessments was 0=no disease activity to 100=maximum disease activity displayed on the 100-mm horizontal VAS. Achievement of an ACR50 requires a >= 50% improvement in the same parameters and an ACR70 requires a >= 70% improvement.

EULAR response was calculated as the difference between DAS28-ESR scores at baseline and Week 24, and reported as the percentage of participants with good, moderate, or no response. Good responders = decrease from baseline >1.2 with a DAS28 score of <=3.2; moderate responders = decrease from baseline >1.2 with a DAS28 score of >3.2, or decrease from baseline >0.6 to <=1.2 with a DAS28 score of <=5.1; non-responders = decrease from baseline <=0.6 or decrease from baseline >0.6 and <=1.2 with a DAS28 score of >5.1.

SDAI is a similar index to DAS28 but has the advantage of not needing a complicated mathematical formula for its determination, but a simple arithmetical addition of TJC28 and SJC28, PGA VAS and Physician Global Assessment of disease activity VAS, and CRP concentration in mg/L. CDAI does not incorporate an acute response, therefore it can be used to evaluate disease activity in the absence of laboratory testing of CRP and ESR. VAS range for all assessments was 0=no disease activity to 100=maximum disease activity displayed on the 100-mm horizontal VAS. SDAI scores ranged from 0 to 86, CDAI from 0 to 76 with higher scores indicating increased disease activity. A negative change from baseline indicates an improvement.

An assessment of 66 joints for swelling and 68 joints for tenderness was made. Joints were assessed and classified as swollen/not swollen and tender/not tender by pressure and joint manipulation on physical examination. Joint prosthesis, arthrodesis or fused joints were not taken into consideration for swelling or tenderness. A negative change from baseline indicates an improvement.

CDAI is calculated by simple arithmetical addition of TJC28 and SJC28, PGA VAS and Physician Global Assessment of disease activity VAS. VAS range was 0=no disease activity to 100=maximum disease activity displayed on the 100-mm horizontal VAS. Total CDAI score ranges from 0 to 76 with higher scores indicating increased disease activity. Clinical remission = score ≤ 2.8; Low disease activity = score > 2.8 and ≤ 10.0; Moderate disease activity = score > 10.0 and ≤ 22.0; High disease activity = score > 22.0.

SDAI is calculated by simple arithmetical addition of TJC28 and SJC28, PGA VAS and Physician Global Assessment of disease activity VAS, and CRP concentration in mg/L. VAS range was 0=no disease activity to 100=maximum disease activity displayed on the 100-mm horizontal VAS. Total SDAI score ranges from 0 to 86 with higher scores indicating increased disease activity. Clinical remission = score ≤ 3.3; Low disease activity = score > 3.3 and ≤ 11.0; Moderate disease activity = score > 11.0 and ≤ 26.0; high disease activity = score > 26.0.

The DAS28 score is a measure of the participant's disease activity calculated using TJC28, SJC28, PGA VAS with 0=no disease activity to 100=maximum disease activity displayed on the 100-millimeter (mm) horizontal VAS and acute phase reactant (erythrocyte sedimentation rate [ESR] or C-reactive protein [CRP]) for a total possible score of 0 to 10. For this study ESR was used to calculate the DAS28 score. The index is calculated using the following formula: DAS28 = (0.56*√[TJC28]) + (0.28*√[SJC28]) + (0.70*ln[ESR]) + (0.014*VAS). Higher scores represent higher disease activity. Clinical remission = score <2.6; Low disease activity = score ≥2.6 and ≤3.2; Moderate disease activity = score > 3.2 and ≤5.1; High disease activity = score >5.1.

The DAS28 score is a measure of the participant's disease activity calculated using TJC28, SJC28, PGA VAS with 0=no disease activity to 100=maximum disease activity displayed on the 100-millimeter (mm) horizontal VAS and acute phase reactant (erythrocyte sedimentation rate [ESR] or C-reactive protein [CRP]) for a total possible score of 0 to 10. For this study ESR was used to calculate the DAS28 score. The index is calculated using the following formula: DAS28 = (0.56*√[TJC28]) + (0.28*√[SJC28]) + (0.70*ln[ESR]) + (0.014*VAS). Higher scores represent higher disease activity. DAS28 Clinically Significant Improvement was defined as a DAS28 score reduction of at least 1.2 units from Baseline.

Physician's Global Assessment of disease activity VAS represents the physician's assessment of the participant's current disease activity on a 100 mm horizontal VAS. The extreme left end of the line represents 0= "no disease activity" (symptom-free and no arthritis symptoms) and the extreme right end 100= "maximum disease activity". This was completed by the Treating Physician (or designee). A negative change from baseline indicates an improvement.

PGA VAS represents the participant's overall assessment of their current disease activity on a 100 mm horizontal VAS. The extreme left end of the line represents 0= "no disease activity" (symptom-free and no arthritis symptoms) and the extreme right end 100="maximum disease activity" (maximum arthritis disease activity). A negative change from baseline indicates an improvement.

Patient's Assessment of Pain VAS represents the participant's assessment of his/her current level of pain on a 100 mm horizontal VAS. The extreme left end of the line represents 0="no pain" and the extreme right end 100="unbearable pain". A negative change from baseline indicates an improvement.

A negative change from baseline in CRP level indicates an improvement.

A negative change from baseline in ESR indicates an improvement.

The Stanford HAQ-DI is a patient-oriented outcome assessment questionnaire specific for rheumatoid arthritis. It consists of 20 questions referring to eight component sets: dressing/grooming, arising, eating, walking, hygiene, reach, grip, and other common activities. Each category contains multiple questions, which were answered using a 4-point scale from 0 to 3. The overall index score was an average of the individual item responses and may range from 0 to 3, where higher scores indicate more difficulty in daily living activities. A negative change from baseline indicates an improvement.

The symptom-specific measure FACIT-F was developed to assess chronic illness therapy with special emphasis on fatigue in the past 7 days. In this study, only the FACIT-F short questionnaire, which is a shorter version of the initial FACIT-F questionnaire, was used. Each of the questions is categorically answered using the scales 0=not at all, 1=a little bit, 2=somewhat, 3=quite a bit, and 4=very much. The figures are reversed during score calculations, so that higher score values indicate more favorable conditions. The 13 items included in the FACIT-F short can be used to calculate the brief score for FACIT-F scale (score range: 0-52). A positive change from baseline indicates an improvement.

The PSQI is a self-rated questionnaire which assesses sleep quality and disturbances over 1-month time interval. Nineteen individual items generate seven "component" scores: subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, use of sleeping medication, and daytime dysfunction. The participant self-rates each of these seven areas of sleep. Scoring of answers is based on a 0 to 3 scale, whereby 3 reflects the negative extreme on the Likert Scale. Global scores range from 0 to 21 and a global sum of "5" or greater indicates a "poor" sleeper. Although there are several questions that request the evaluation of the participant's bed mate or roommate, these are not scored. A negative change from baseline indicates an improvement.

The Patient Quality of Sleep VAS assessment represents the participant's assessment of his/her current quality of sleep on a 100 mm horizontal VAS. The extreme left end of the line represents 0="no difficulty to sleep" and the extreme right end 100="extreme sleeping difficulties". A negative change from baseline indicates an improvement.

The AIMS-SF is a reduced version of the validated AIMS2 questionnaire. The Short Form has been developed using a comprehensive expert-based approach and supported by psychometric testing. The AIMS-SF is a self-administered questionnaire to measure changes in global health, pain, mobility and social function in adult patients with arthritis and reports scores for physical, symptoms, affect, social and work assessments. Scores range from 0 to 10, higher scores indicating higher impact of arthritis on the assessments. A negative change from baseline indicates an improvement.

The Patient Fatigue VAS assessment represents the participant's assessment of his/her current level of fatigue on a 100 mm horizontal VAS. The extreme left end of the line represents 0="no fatigue" and the extreme right end 100="extreme fatigue". A negative change from baseline indicates an improvement.

The Patient Satisfaction VAS assessment represents the participant's assessment of his/her current satisfaction with treatment on a 100 mm horizontal VAS. The extreme left end of the line represents 0="no satisfaction" and the extreme right end 100="extremely satisfied". A positive change from baseline indicates an improvement.

The 23-item RA-WIS is a simple, validated screening tool for work instability, i.e., the consequences of a mismatch between an individual's functional ability and their work tasks. This self-administered questionnaire covers a broad range of specific work-related issues and enables monitoring the risk of work disability in rheumatoid arthritis patients. The RA-WIS is scored by summing responses from all 23 scale items. The scale ranges from 0 to 23. Cut points have been established to differentiate levels of work instability: low < 10, moderate 10-17 and high > 17. A negative change from baseline indicates an improvement.

The abbreviated 9-item Treatment Satisfaction Questionnaire for Medication (TSQM-9) derived from the TSQM Version 1.4 but without the five items of the side effects domain, is a reliable and valid measure to assess participants' satisfaction with treatment. The TSQM-9 domain scores range from 0 to 100 with higher scores representing higher satisfaction on that domain. Domains included are effectiveness, convenience and global satisfaction.

An adverse event is any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with the treatment. An adverse event can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of a pharmaceutical product, whether or not considered related to the pharmaceutical product. Preexisting conditions which worsen during a study are also considered as adverse events.