OS was defined as the time from date of randomization to date of death due to any cause. For a subject not expiring, the OS time was censored on the last date of contact that they were known to be alive. The Kaplan-Meier method was used to analyze variables of duration and event associated with possible censoring and estimate the medians survival by treatment groups. The confidence intervals for the medians were calculated using the Brookmeyer and Crowley's method.

FAP = Full analysis population (all treated patients)analyzed in the arm they were assigned by randomization, assuming they had a confirmed small cell lung cancer. The enrollment of Cohort 1 was terminated early per protocol amendment (29 September 2003). With limited number of subjects in Cohort 1, the efficacy analysis was exploratory.

Objective disease response = subjects with confirmed complete response (CR) or partial response (PR) according to the Response Evaluation Criteria in Solid Tumors (RECIST). A CR was defined as the disappearance of all target lesions. A PR was defined as a ≥ 30% decrease in the sum of the longest dimensions of the target lesions taking as a reference the baseline sum longest dimensions.

FAP = Full analysis population (all treated patients)analyzed in the arm they were assigned by randomization, assuming they had a confirmed small cell lung cancer. The enrollment of Cohort 1 was terminated early per protocol amendment (29 September 2003). With limited number of subjects in Cohort 1, the efficacy analysis was exploratory.

OS was defined as the time from date of randomization to date of death due to any cause. For a subject not expiring, the OS time was censored on the last date of contact that they were known to be alive. The Kaplan-Meier method was used to analyze variables of duration and event associated with possible censoring and estimate the medians survival by treatment groups. The confidence intervals for the medians were calculated using the Brookmeyer and Crowley's method.

PP population = a subset of the Cohort 2 FAP. The subjects had to be eligible (subject had no major protocol deviations from inclusion and noninclusion criteria), evaluable for response, without any major protocol deviations during the study.

DR was defined as the time from start of the first documentation of objective tumor response (CR or PR) to the first documentation of objective tumor progression. The Kaplan-Meier method was used to analyze variables of duration and event associated with possible censoring and estimate the medians survival by treatment groups. The confidence intervals for the medians were calculated using the Brookmeyer and Crowley's method.

FAP = Full analysis population (all treated patients) of Cohort 2 (after the 29 September 2003 protocol amendment), analyzed in the arm they were assigned by randomization, assuming they had a confirmed small cell lung cancer.

TTP was defined as the time from date of randomization to the date of the first documentation of tumor progression. The Kaplan-Meier method was used to analyze variables of duration and event associated with possible censoring and estimate the medians survival by treatment groups. The confidence intervals for the medians were calculated using the Brookmeyer and Crowley's method.

FAP = Full analysis population (all treated patients)analyzed in the arm they were assigned by randomization, assuming they had a confirmed small cell lung cancer. The enrollment of Cohort 1 was terminated early per protocol amendment (29 September 2003). With limited number of subjects in Cohort 1, the efficacy analysis was exploratory.

The EORTC QLQ-C30 scales include 5 functional scales (physical, role, cognitive, emotional, and social), a global health status/QL scale and 9 symptom scales: nausea and vomiting, pain, fatigue, dyspnea, insomnia, appetite loss, constipation, diarrhea and financial difficulties. All scales and single-item measures range from 0 to 100. A high score for a functional scale represents a high/healthy level of functioning, for the global health status/QL represents a high QL (better patient state), and for a symptom scale/item represents a high level of symptomatology/problems (worse patient state).

Data were not analyzed.

Improvement of ≥ 1 tumor related symptom = clinical benefit responder. Pain improvement = decrease of ≥ 1 National Cancer Institute (NCI) grade from baseline of ≥ 1 symptom of NCI pain category, without pain symptom worsening. Cough, dyspnea and hemoptysis improvement = decrease of ≥ 1 NCI grade from baseline. Positive weight change ≥ 5 percent gain from baseline. Positive analgesic consumption = change from baseline from opioid to non-opioid category.

Data were not analyzed.