A Study of Tarceva (Erlotinib) in Sequential Combination With Gemcitabine as First Line Therapy in Patients With Advanced Non-Small Cell Lung Cancer

Progression-free survival (PFS) was defined as the time from randomization to the date of first documentation of progressive disease (PD), according to Response Evaluation Criteria in Solid Tumors (RECIST) version (V) 1.0, or date of death from any cause. PD was defined for target lesions (TLs) as at least a 20 percent (%) increase in the sum of the longest diameter (SLD), taking as reference the smallest SLD recorded since the start of treatment, and for non-target lesions (NTLs) as unequivocal progression of NTLs. Participants without documented PD were censored at the date of last tumor assessment, the last date recorded in the drug log, or the last date of follow-up the participant was known to be progression free, whichever was last. Participants without a post-Baseline (BL) tumor assessment who were known to be alive were censored at the date of randomization.

The median time, in weeks, between randomization and PFS event. Participants without documented PD were censored at the date of last tumor assessment, the last date recorded in the drug log, or the last date of follow-up the participant was known to be progression free, whichever was last. Participants without a post-BL tumor assessment who were known to be alive were censored at the date of randomization. PFS was estimated by using Kaplan-Meier methodology.

As per RECIST V 1.0: for TLs, CR was defined as the disappearance of all TLs, and PR was defined as at least a 30% decrease in the SLD of TLs taking as reference the BL SLD. For NTLs, CR was defined as the disappearance of all NTLs and normalization of tumor marker levels. The 95% confidence interval (CI) for one-sample binomial was determined using the Pearson-Clopper Method.

Non-progression was defined as CR, PR, or stable disease according to RECIST V 1.0: for TLs, CR was defined as the disappearance of all TLs, PR was defined as at least a 30% decrease in the SLD of TLs taking as reference the BL SLD, and SD was defined as neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD, taking as reference the smallest SLD recorded since the start of treatment. For NTLs, CR was defined as the disappearance of all NTLs and normalization of tumor marker levels, and SD was defined as the persistence of 1 or more NTLs and/or maintenance of tumor marker levels above the normal limits. The 95% CI for one-sample binomial was determined using the Pearson-Clopper method.

OS was defined as the median time, in weeks, between randomization and death due to any cause. Participants without documented death were censored at the last date recorded in the drug log, or the last date of follow-up the participant was known to be alive, whichever was last. Participants without a post-BL assessment who were known to be alive were censored at the date of randomization. OS was estimated using Kaplan-Meier methodology.

Duration of response was defined as the time between the first documentation of CR or PR (whichever status was recorded first as assessed by the RECIST V 1.0) until the date of documented disease progression or death. Participants with no documented disease progression or death after confirmed CR or PR were censored at the date of the last tumor assessment or last date of follow-up when the participant was known to be progression free, whichever was last.