Efficacy Trial Comparing ZD6474 With Erlotinib in NSCLC After Failure of at Least One Prior Chemotherapy

Median time (in weeks) from randomisation until objective disease progression or death (by any cause in the absence of objective progression) provided death is within 3 months from the last evaluable Response Evaluation Criteria In Solid Tumors (RECIST) assessment.

Progression was derived according to RECIST 1.0 and is defined as an increase of at least 20% in the total tumour size of measurable lesions over the nadir measurement, unequivocal progression in the non-target lesions or the appearance of one or more new lesions.

Overall survival is defined as the time from date of randomization until death. Any patient not known to have died at the time of analysis will be censored based on the last recorded date on which the patient was known to be alive (ie their status must be known at the censored date and should not be lost to follow up or unknown).

The ORR is the number of patients that are responders ie those patients with a confirmed best objective response of complete response (CR) or partial response (PR) as determined according to RECIST 1.0. CR is defined as the disappearance of all target lesions with no evidence of tumour elsewhere and PR is defined as at least a 30% reduction in the total tumour size of measurable lesions with no new lesions and no progression in the non-target lesions.

Disease control rate is defined as the number of patients who achieved disease control at least 8 weeks following randomisation. Disease control is defined as a best objective response of complete response (CR), partial response (PR) or stable disease (SD) >= 8 weeks as determined according to RECIST 1.0. CR is defined as the disappearance of all target lesions with no evidence of tumour elsewhere, PR is defined as at least a 30% reduction in the total tumour size of measurable lesions with no new lesions and no progression in the non-target lesions and SD >= 8 is assigned to patients who have not responded and have no evidence of progression at least 8 weeks after randomisation.

Pain was assessed as the average score of two items: Question 9 ("Have you had pain") and 19 ("Did pain interfere with your daily activities") of the QLQ-C30.

Time to deterioration in symptoms is defined as the interval from the date of randomization to the first assessment of worsened without an improvement in the next 28 days. A patient is defined as having a deterioration in symptoms if they have a single visit assessment of 'worsened' with no visit assessment of 'improved' within the next 28 days.

Dyspnea was assessed as the average score of four items: Question 8 of the QLQ-C30 ("Were you short of breath") and Question 3 of the QLQ-C30 ("Were you short of breath when you rested"), Questions 4 ("Were you short of breath when you walked") and 5 ("Were you short of breath when you climbed stairs") of the QLQ-LC13 (or, equivalently, Questions 33, 34 and 35 of the combined QLQ-C30 and QLQ-LC13 questionnaires).

Time to deterioration in symptoms is defined as the interval from the date of randomization to the first assessment of worsened without an improvement in the next 28 days. A patient is defined as having a deterioration in symptoms if they have a single visit assessment of 'worsened' with no visit assessment of 'improved' within the next 28 days.

Cough was assessed using Question 1 ("How much did you cough") of the QLQ-LC13 (or, equivalently, Question 31 of the combined QLQ-C30 and QLQ-LC13 questionnaires).

Time to deterioration in symptoms is defined as the interval from the date of randomization to the first assessment of worsened without an improvement in the next 28 days. A patient is defined as having a deterioration in symptoms if they have a single visit assessment of 'worsened' with no visit assessment of 'improved' within the next 28 days.