A Study to Assess Efficacy and Safety of Eltrombopag in Combination With a Short Course of Dexamethasone in Patients With Newly Diagnosed ITP

Sustained response off treatment at 52 weeks is defined as maintenance of platelet count ≥ 30 × 10^9/L after treatment discontinuation until Week 52 in the absence of bleeding events ≥ Grade II or use of any rescue medication at all visits until Week 52. Bleeding events ≥ Grade II are assessed by the modified World Health Organization (WHO) Bleeding Scale; Bleeding is graded based on a 1-4 scale (1=minor bleeding to 4=severe bleeding). Characteristics of bleeding events ≥ Grade II include: epistaxis ≥30 minutes, large purpura, joint bleeding, melanotic stool, hematemesis, gross hematuria, abnormal vaginal bleeding, hemoptysis, Visible blood in body cavity fluid, retinal bleeding, bleeding at invasive sites, bleeding requiring transfusion, bleeding associated with moderate or severe hemodynamic instability, fatal bleeding, CNS bleeding.

Overall response after treatment at week 52 was defined as maintenance of platelet count ≥ 30 x 109/L and ≥ 2-fold increase of screening platelet count after treatment discontinuation in the absence of bleeding event ≥ Grade II and no rescue therapy at all visits until Week 52. Bleeding events ≥ Grade II are assessed by the modified World Health Organization (WHO) Bleeding Scale; Bleeding is graded based on a 1-4 scale (1=minor bleeding to 4=severe bleeding). Characteristics of bleeding events ≥ Grade II include: epistaxis ≥30 minutes, large purpura, joint bleeding, melanotic stool, hematemesis, gross hematuria, abnormal vaginal bleeding, hemoptysis, Visible blood in body cavity fluid, retinal bleeding, bleeding at invasive sites, bleeding requiring transfusion, bleeding associated with moderate or severe hemodynamic instability, fatal bleeding, CNS bleeding.

Duration of sustained response off treatment is defined as time of treatment discontinuation until platelet count < 30 × 109/L or bleeding events ≥ Grade II or use of any rescue therapy. If sustained response remains, the interval was censored with the date of the last platelet assessment. Bleeding events ≥ Grade II are assessed by the modified World Health Organization (WHO) Bleeding Scale; Bleeding is graded based on a 1-4 scale (1=minor bleeding to 4=severe bleeding). Characteristics of bleeding events ≥ Grade II include: epistaxis ≥30 minutes, large purpura, joint bleeding, melanotic stool, hematemesis, gross hematuria, abnormal vaginal bleeding, hemoptysis, Visible blood in body cavity fluid, retinal bleeding, bleeding at invasive sites, bleeding requiring transfusion, bleeding associated with moderate or severe hemodynamic instability, fatal bleeding, CNS bleeding.

Overall response by week 4 is defined as platelet count ≥ 30 × 109/L and ≥ 2 fold increase of screening platelet count and absence of bleeding and no rescue therapy within the first 4 weeks

Complete Response by week 4 is defined as platelet count ≥ 100 × 109/L and absence of bleeding and no rescue therapy until week 4.

Absolute change in platelet count from pre-treatment or screening to baseline (week 1) and from pre-treatment / screening to 2, 4, 13, 27 and 53 weeks. If pre-treatment was necessary before inclusion, platelet count data performed directly before pre-treatment were used for study inclusion (screening value to be used for inclusion/exclusion check and for analysis as a covariate).

Relative change in platelet count from pre-treatment or screening to baseline (week 1) and from pre-treatment or screening to 2, 4, 13, 27, and 53 weeks. If pre-treatment was necessary before inclusion, platelet count data performed directly before pre-treatment were used for study inclusion (screening value to be used for inclusion/exclusion check and for analysis as a covariate).

Time to overall response is defined as time from starting study treatment to time of achievement of overall response. Overall response is defined as a platelet count ≥ 30 × 10^9/L and ≥ 2 fold increase of baseline platelet count and absence of bleeding and no rescue therapy censored with the last visit date for patients not achieving overall response. Results of TOR are reported per Kaplan-Meier estimates.

Time to complete response is defined as time from starting study treatment to time of achievement of complete response. Complete response is defined as a platelet count ≥ 100 × 109/L and absence of bleeding and no rescue therapy. Results of time to complete response are reported per Kaplan-Meier estimates.

Duration of overall or complete response (CR) is defined as time of achievement of overall or CR until loss of overall or CR. The duration of CR was calculated from the date of onset of CR until platelet count < 100 x 109/L, or bleeding events ≥ Grade II (assessed by the modified World Health Organization (WHO) Bleeding Scale) or use of any rescue therapy, whatever was earlier. Bleeding is graded based on a 1-4 scale (1=minor bleeding to 4=severe bleeding). Characteristics of bleeding events ≥ Grade II include: epistaxis ≥30 minutes, large purpura, joint bleeding, melanotic stool, hematemesis, gross hematuria, abnormal vaginal bleeding, hemoptysis, Visible blood in body cavity fluid, retinal bleeding, bleeding at invasive sites, bleeding requiring transfusion, bleeding associated with moderate or severe hemodynamic instability, fatal bleeding, CNS bleeding. Results of duration of overall and complete response are reported per Kaplan-Meier estimates.

The Functional Assessment of Chronic Illness Therapy-Fatigue (FACIT-Fatigue) instrument is a 13-item validated tool used to measure an individual's level of fatigue during usual daily activities over the past 7 days. Items are scored on a 0-4 response scale (4=not at all to 0=very much) where the total possible score ranges from 0-52 (all items are summed up to create the total score); A score of less than 30 indicates severe fatigue. The higher scores represent better HRQoL.

SF36 questionnaire is a tool to measure health-related QoL. SF36 questionnaires (physical and mental score) were answered throughout the study and is a validated instrument with 36 questions to measure general physical and mental health status via assessment of 8 domains-Physical Functioning, Role Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role Emotional, and Mental Health-over the past 4 weeks. The SF36 is scored using norm-based scoring procedures and scores ranging from 0-100; higher values indicate less impairment, a higher QoL. In addition to this SAP-planned scoring score, an alternative scoring for both the physical SF36 score and the mental SF36 were performed by QualityMetric (QM) Incorporated, an IQVIA business.

Incidence and severity of bleeding assessed by the modified World Health Organization (WHO) Bleeding Scale; Bleeding is graded based on a 1-4 scale (1=minor bleeding to 4=severe bleeding).

Incidence of bleeding: participants had at least one bleeding event. Severity of bleeding: bleeding event is from grade 2 and higher