A Study of Enzastaurin in Participants With Follicular Lymphoma

Tumor response rate is defined as the number of responders divided by the number of treated patients. A responder is a patient who exhibits a complete response (CR), complete response unconfirmed (CRu), or partial response (PR) as defined by Cheson et al. CR, the disappearance of target lesions and any pathological lymph nodes [target or non-target] taking as reference the baseline sum of diameters in response to treatment; CRu, complete disappearance of all detectable clinical and radiographic evidence of disease, return of spleen to non-palpable if involved, residual lymph node mass greater than 1.5 centimeters (cm) has regressed by more than 75%; PR, 50% decrease in the sum of the products of the greatest diameter (SPD) of the 6 largest dominant masses, no increase of other nodes, liver or spleen and no new sites of disease.

PFS is defined as the time from the date of study enrollment to the first date of measured progressive disease or death from any cause. For patients not known to have died as of the data cut-off date and who do not have objective progressive disease, PFS will be censored at the date of the last objective progression-free assessment. For patients who receive subsequent anticancer therapy (after discontinuation from the study treatment) prior to objective disease progression or death, PFS will be censored at the date of last objective progression-free assessment prior to the initiation of postdiscontinuation anticancer therapy. For reference, PFS will also be calculated and analyzed based on an alternative definition of censoring: for each patient who is not known to have died or to have had objective progression of disease as of the data cut-off date, PFS will be censored for that analysis at the date of last prior contact.

TtR is defined as the time from the date of study enrollment to the date of response (CR, CRu, or PR) for patients who have responded prior to receiving any subsequent anticancer therapy.CR, the disappearance of target lesions and any pathological lymph nodes [target or non-target] taking as reference the baseline sum of diameters in response to treatment; CRu, complete disappearance of all detectable clinical and radiographic evidence of disease, return of spleen to non-palpable if involved, residual lymph node mass greater than 1.5 centimeters (cm) has regressed by more than 75%; PR, 50% decrease in the sum of the products of the greatest diameter (SPD) of the 6 largest dominant masses, no increase of other nodes, liver or spleen and no new sites of disease.

DoR is defined as the time from the date when the measurement criteria are met for CR, CRu, or PR (whichever status is recorded first) until the date of first observation of measured progressive disease. For responding participants who die without progressive disease (including death from study disease), DoR will be censored at the date of death. For responding participants not known to have died as of the data cut-off date and who do not have progressive disease, DoR will be censored at the last objective progression-free assessment date prior to the data cut-off date. For responding participants who receive subsequent anticancer therapy (after discontinuation from the study treatment) prior to disease progression, DoR will be censored at the date of last objective progression-free assessment prior to the initiation of postdiscontinuation anticancer therapy.

Correlative analyses of tumor RR for PKC-β2 (protein kinase C-β) protein expression. Immunohistochemistry (IHC) staining was performed to assess protein expression of PKC-β2 in cytoplasm reported as H scores (logistic model of response rate), which was derived from a weighted average of staining intensity (scale 0 to 3, increasing intensity) and percentage of positive cells (0 to 100%) at each staining intensity. PKC-β2 expression was further classified into high vs. low expression using the cutpoint of the median of the distribution of PKC-β2 H scores.