EXTEND (Eltrombopag Extended Dosing Study)

Subjects who achieved maximum platelet count at least once during treatment. All platelet counts after an on-study splenectomy are not classed as responses.

Platelet counts within 7 days after a platelet transfusion are not classed as responses.

Platelet counts while taking an increased ITP medication or within 6 weeks after the end of an increased ITP medication are not classed as responses.

If a subject has more than 1 platelet count result within a week, the lowest value observed is used to determine response. All platelet counts after an on-study splenectomy are not classed as responses. Platelet counts within 7 days after a platelet transfusion are not classed as responses.

Platelet counts while taking an increased ITP medication or within 6 weeks after the end of an increased ITP medication are not classed as responses.

Responder in TRA100773: Platelet count 50 Gi/L and 2 x baseline (BL) at last on-treatment assessment. Responders in EXTEND: Platelet count 50 Gi/L and 2 x baseline (BL), 50 Gi/L, and 30 Gi/L at any time. Responder in RAISE: Platelet count 50GI/L and 2 x baseline at Week 6 assessment. Responders in EXTEND: Platelet count 50 Gi/L and 2 x baseline, 50 Gi/L, and 30 Gi/L at any time. Responder in REPEAT: Platelet count 50 GI/L and 2 x baseline (BL) at Week 6 assessment in Cycle 1. Responders in EXTEND: Platelet count 50 Gi/L and 2 x baseline (BL) 50 Gi/L, and 30 Gi/L at any time.

Sustain reduct: Sustained reduction 1 Denominator is number of subjects taking an ITP medication at baseline. 2 Denominator is number of subjects with a sustained reduction. Note: Sustained reduction defined as reduction from baseline in dose and/or frequency which is maintained for at least 4 weeks. Excludes sustained reductions started more than 1 day after last dose.

Rescue treatment is defined as a composite of: new ITP medication, increased dose of a concomitant ITP medication, platelet transfusion, and splenectomy. Subjects may have received more than 1 type of rescue therapy

The ITP bleeding score is a tool which has been designed specifically to assess the bruising and bleeding in patients with ITP across body sites, ranging from mild to severe. The WHO Grades were dichotomized into the following categories: - Grade 0, No bleeding -Grade 1 to 4, Any bleeding -Grade 0 to 1: No clinically significant bleeding -Grade 2 to 4 Clinically significant bleeding

The SF-36v2 assessment tool was used to obtain information about subjects' general health status and health-related quality of life. Until a formal assessment of minimal clinically important differences (MCID) is performed, changes from baseline of more than 0.5 standard deviations are suggested as clinically meaningful. Scores were transformed to a 0-100 point scale, with higher scores representing more positive answers. Scores were normalized to have a mean of 50 and SD of 10 to allow for comparison with outcomes from other chronic diseases. Recall period is the past week prior to administration. The change in scores was measured at the transitioning period and immediately prior to withdrawal/completion over 2 years, and the mean of these measurements was recorded to calculate the change from baseline and the best post baseline change score was reported for the entire group

The MEI-SF (18 questions) was used to measure the reductions in mental energy, physical energy, and social motivation, either as symptoms of chronic ITP or as a side effect of pharmacotherapy. Minimal clinically important differences are estimated as 0.5 standard deviations or 7.5 points. All items use either a 7-level (0 to 6) or 5-level (0 to 4) response scale; items with a 5-level response scale were rescaled to 7-levels, and items were reverse-scored as necessary such that higher scores represent higher HRQoL Total score ranges from 0 to 108 points. Recall period is past week prior to administration. The change in scores was measured at the transitioning period and immediately prior to withdrawal/completion over 2 years, and the mean of these measurements was recorded to calculate the change from baseline and the best post baseline change score was reported for the entire group

The FACIT-Fatigue consists of 13 questions in which patients rate the frequency (0-4) of symptoms of fatigue, in terms of tiredness, weakness, and fatigue Items were reverse-scored as necessary such that higher scores represent higher HRQoL Total score ranges from 0 to 52.Using anchor-based estimates, the minimally important difference in this subscale is 3.0 points.

Recall period is past week prior to administration. The change in scores was measured at the transitioning period and immediately prior to withdrawal/completion over 2 years, and the mean of these measurements was recorded to calculate the change from baseline and the best post baseline change score was reported for the entire group

The FACT-TH6 consists of 6 questions in which patients rate (0-4) their general degree of worry related to bleeding and bruising, and resulting activity impairment and frustration. Although the six items do not constitute a formal domain or subscale of the FACT-Th assessment tool, these items had been identified by focus groups of patients with chronic ITP as important indicators of their HRQoL. Items were reverse-scored as necessary such that higher scores represent higher HRQoL. Total scores ranged from 0 to 24. Recall period is not specified. The change in scores was measured at the transitioning period and immediately prior to withdrawal/completion over 2 years, and the mean of these measurements was recorded to calculate the change from baseline and the best post baseline change score was reported for the entire group