A Study of Pemetrexed/Cisplatin as Pre-operative Treatment of Early Stage Nonsquamous Non-Small Cell Lung Cancer

Response was defined using Response Evaluation Criteria In Solid Tumors (RECIST v1.1) criteria. CR was defined as the disappearance of all target and non-target lesions and all target and non-target lymph nodes were non-pathological or normal in size [<10 millimeter (mm) short axis]. PR was defined as having at least a 30% decrease in sum of longest diameter of target lesions taking as reference the baseline sum diameters. ORR calculated as: (sum of the number of participants with PRs and CRs) divided by (number of evaluable participants) multiplied by 100.

pCR after the participant has undergone surgery was calculated as: (total number of participants with pCR) divided by (the total number of participants in pathological response population) multiplied by 100.

Tumor downstaging compared to baseline (Stage IIIAN2) were those participants who exhibited a downward shift in tumor extent from Stage IIIAN2 to Stages IIIA, II, I, or 0 were reported. Downstaging was based on radiological examination. Stage IIIAN2 was locally advanced and/or involved lymph nodes, metastasis in ipsilateral mediastinal and or subcarinal lymph nodes, tumors were ≤2 centimeters (cm) up to 5 cm in greatest dimension; Stage IIIA was locally advanced and/or involved lymph nodes, tumor extension was restricted to the affected lung; Stage II was locally advanced and/or involved lymph nodes; Stage I was small localized cancers, usually curable; Stage 0 the cancer did not spread beyond the inner lining of the lung. Missing responses were also reported. Percentage of participants calculated as: (number of participants with a downward shift in extent of their tumor) divided by (total number of evaluable participants) multiplied by 100.

OS was defined as duration from the date of study enrollment to the date of death from any cause. Participants not known to have died as of the data inclusion cut-off date were censored at the date of last contact. The last contact for participants in post-discontinuation was the last date participant was known to be alive.

PFS was defined as the time from date of first dose to the first observation of disease progression or death due to any cause. For participants not known to have died or did not have objective progressive disease (PD) as of the data inclusion cut-off date, PFS was censored at the date of the last objective progression-free disease assessment. PD was defined using RECIST v1.1 criteria as at least a 20% increase in the sum of the diameters of target lesions, taking as reference the smallest sum on study (including the baseline sum if that is the smallest). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm. The appearance of one or more new lesions is also considered progression.